/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:37:28,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:37:28,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:37:28,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:37:28,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:37:28,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:37:28,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:37:28,366 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-Separate.epf [2021-06-05 14:37:28,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:37:28,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:37:28,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:37:28,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:37:28,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:37:28,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:37:28,404 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:37:28,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:37:28,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:37:28,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:37:28,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:37:28,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:37:28,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:37:28,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:37:28,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:37:28,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:37:28,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:37:28,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:37:28,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:37:28,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:37:28,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:37:28,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:37:28,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:37:28,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:37:28,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:37:28,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:37:28,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:37:28,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:37:28,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:37:28,409 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:37:28,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:37:28,409 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:37:28,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:37:28,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:37:28,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:37:28,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:37:28,752 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:37:28,754 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:37:28,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2021-06-05 14:37:28,755 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2021-06-05 14:37:29,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:37:29,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:37:29,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:37:29,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:37:29,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:37:29,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:37:29,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:37:29,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:37:29,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:37:29,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... [2021-06-05 14:37:29,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:37:29,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:37:29,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:37:29,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:37:29,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:37:29,208 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:37:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:37:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:37:29,209 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:37:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:37:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:37:29,210 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:37:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:37:29,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:37:29,210 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:37:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:37:29,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:37:29,211 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:37:29,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:37:29,676 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 14:37:29,677 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:37:29 BoogieIcfgContainer [2021-06-05 14:37:29,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:37:29,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:37:29,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:37:29,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:37:29,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:37:29" (1/2) ... [2021-06-05 14:37:29,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2020f2 and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:37:29, skipping insertion in model container [2021-06-05 14:37:29,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:37:29" (2/2) ... [2021-06-05 14:37:29,683 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2021-06-05 14:37:29,688 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:37:29,688 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:37:29,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:37:29,689 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:37:29,717 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 14:37:29,735 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 14:37:29,751 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:37:29,751 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:37:29,752 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:37:29,752 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:37:29,752 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:37:29,752 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:37:29,752 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:37:29,752 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:37:29,759 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-06-05 14:37:29,774 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:37:29,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:29,784 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:29,785 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 454115418, now seen corresponding path program 1 times [2021-06-05 14:37:29,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:29,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985875996] [2021-06-05 14:37:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:30,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985875996] [2021-06-05 14:37:30,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985875996] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:30,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:30,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:30,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308690420] [2021-06-05 14:37:30,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:30,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:30,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:30,105 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:30,308 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2021-06-05 14:37:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:37:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:30,325 INFO L225 Difference]: With dead ends: 265 [2021-06-05 14:37:30,325 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 14:37:30,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 14:37:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-06-05 14:37:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-06-05 14:37:30,370 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-06-05 14:37:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:30,371 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-06-05 14:37:30,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-06-05 14:37:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:37:30,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:30,373 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:30,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:37:30,373 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:30,374 INFO L82 PathProgramCache]: Analyzing trace with hash -947352844, now seen corresponding path program 2 times [2021-06-05 14:37:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:30,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191641649] [2021-06-05 14:37:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:30,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191641649] [2021-06-05 14:37:30,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191641649] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:30,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:30,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:30,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079360937] [2021-06-05 14:37:30,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:30,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:30,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:30,460 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:30,585 INFO L93 Difference]: Finished difference Result 326 states and 1050 transitions. [2021-06-05 14:37:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:30,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:37:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:30,589 INFO L225 Difference]: With dead ends: 326 [2021-06-05 14:37:30,589 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 14:37:30,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 14:37:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 132. [2021-06-05 14:37:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-06-05 14:37:30,603 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-06-05 14:37:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:30,604 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-06-05 14:37:30,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-06-05 14:37:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:37:30,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:30,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:30,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:37:30,606 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:30,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:30,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-06-05 14:37:30,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:30,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161607336] [2021-06-05 14:37:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:30,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:30,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161607336] [2021-06-05 14:37:30,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161607336] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:30,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:30,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:30,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417948072] [2021-06-05 14:37:30,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:30,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:30,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:30,763 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:30,904 INFO L93 Difference]: Finished difference Result 261 states and 774 transitions. [2021-06-05 14:37:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:37:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:30,911 INFO L225 Difference]: With dead ends: 261 [2021-06-05 14:37:30,912 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 14:37:30,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 14:37:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 140. [2021-06-05 14:37:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 14:37:30,934 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 14:37:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:30,934 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 14:37:30,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 14:37:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:37:30,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:30,936 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:30,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:37:30,936 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-06-05 14:37:30,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:30,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281341689] [2021-06-05 14:37:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:31,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:31,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281341689] [2021-06-05 14:37:31,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281341689] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:31,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:31,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:31,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347896798] [2021-06-05 14:37:31,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:31,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:31,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:31,018 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:31,190 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2021-06-05 14:37:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:31,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:37:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:31,192 INFO L225 Difference]: With dead ends: 264 [2021-06-05 14:37:31,193 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 14:37:31,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 14:37:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2021-06-05 14:37:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-05 14:37:31,215 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-05 14:37:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:31,215 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-05 14:37:31,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-05 14:37:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:37:31,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:31,217 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:31,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:37:31,218 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-06-05 14:37:31,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:31,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133700362] [2021-06-05 14:37:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:31,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:31,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133700362] [2021-06-05 14:37:31,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133700362] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:31,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:31,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:31,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095003376] [2021-06-05 14:37:31,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:31,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:31,328 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,572 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-05 14:37:31,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:31,602 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2021-06-05 14:37:31,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:31,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:37:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:31,604 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:37:31,604 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 14:37:31,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 14:37:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2021-06-05 14:37:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 14:37:31,612 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 14:37:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:31,612 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 14:37:31,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 14:37:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:37:31,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:31,613 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:31,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:37:31,614 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:31,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:31,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-06-05 14:37:31,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:31,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553018802] [2021-06-05 14:37:31,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:31,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:31,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:31,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553018802] [2021-06-05 14:37:31,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553018802] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:31,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:31,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:31,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655727235] [2021-06-05 14:37:31,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:31,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:31,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:31,715 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,060 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-05 14:37:32,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,084 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2021-06-05 14:37:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:37:32,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:37:32,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,087 INFO L225 Difference]: With dead ends: 336 [2021-06-05 14:37:32,087 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:37:32,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:37:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:37:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2021-06-05 14:37:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-05 14:37:32,094 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-05 14:37:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,094 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-05 14:37:32,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-05 14:37:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:37:32,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,095 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:37:32,096 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1444712772, now seen corresponding path program 1 times [2021-06-05 14:37:32,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534529446] [2021-06-05 14:37:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534529446] [2021-06-05 14:37:32,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534529446] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:32,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:32,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:37:32,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048086183] [2021-06-05 14:37:32,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:37:32,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:37:32,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:37:32,112 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,117 INFO L93 Difference]: Finished difference Result 166 states and 549 transitions. [2021-06-05 14:37:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:37:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:37:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,119 INFO L225 Difference]: With dead ends: 166 [2021-06-05 14:37:32,119 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 14:37:32,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:37:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 14:37:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-06-05 14:37:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-06-05 14:37:32,124 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-06-05 14:37:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,124 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-06-05 14:37:32,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-06-05 14:37:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:37:32,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,125 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:37:32,125 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash 868256482, now seen corresponding path program 1 times [2021-06-05 14:37:32,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081931380] [2021-06-05 14:37:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081931380] [2021-06-05 14:37:32,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081931380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:32,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:32,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:37:32,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012462802] [2021-06-05 14:37:32,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:37:32,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:37:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:37:32,142 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,147 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2021-06-05 14:37:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:37:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:37:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,149 INFO L225 Difference]: With dead ends: 192 [2021-06-05 14:37:32,149 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 14:37:32,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:37:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 14:37:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-06-05 14:37:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-06-05 14:37:32,155 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-06-05 14:37:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,155 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-06-05 14:37:32,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-06-05 14:37:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:37:32,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,156 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:37:32,156 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-06-05 14:37:32,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669862310] [2021-06-05 14:37:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669862310] [2021-06-05 14:37:32,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669862310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:32,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:32,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:37:32,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700731450] [2021-06-05 14:37:32,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:37:32,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:37:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:37:32,174 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,179 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2021-06-05 14:37:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:37:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:37:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,181 INFO L225 Difference]: With dead ends: 223 [2021-06-05 14:37:32,181 INFO L226 Difference]: Without dead ends: 223 [2021-06-05 14:37:32,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:37:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-05 14:37:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-05 14:37:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-06-05 14:37:32,188 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-06-05 14:37:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,188 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-06-05 14:37:32,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-06-05 14:37:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:32,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,189 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:37:32,190 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1505443044, now seen corresponding path program 1 times [2021-06-05 14:37:32,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788901793] [2021-06-05 14:37:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:32,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788901793] [2021-06-05 14:37:32,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788901793] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:32,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:32,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:32,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221524901] [2021-06-05 14:37:32,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:32,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:32,234 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,274 INFO L93 Difference]: Finished difference Result 414 states and 1238 transitions. [2021-06-05 14:37:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:32,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,276 INFO L225 Difference]: With dead ends: 414 [2021-06-05 14:37:32,276 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:37:32,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:37:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:37:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 223. [2021-06-05 14:37:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.3063063063063063) internal successors, (734), 222 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 734 transitions. [2021-06-05 14:37:32,285 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 734 transitions. Word has length 16 [2021-06-05 14:37:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,285 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 734 transitions. [2021-06-05 14:37:32,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 734 transitions. [2021-06-05 14:37:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:32,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,286 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:37:32,286 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,287 INFO L82 PathProgramCache]: Analyzing trace with hash 821727578, now seen corresponding path program 1 times [2021-06-05 14:37:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928584441] [2021-06-05 14:37:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:32,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928584441] [2021-06-05 14:37:32,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928584441] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:32,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:32,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221143303] [2021-06-05 14:37:32,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:32,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:32,322 INFO L87 Difference]: Start difference. First operand 223 states and 734 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,387 INFO L93 Difference]: Finished difference Result 571 states and 1740 transitions. [2021-06-05 14:37:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:37:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,390 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:37:32,390 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 14:37:32,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:37:32,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 14:37:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2021-06-05 14:37:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2021-06-05 14:37:32,400 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2021-06-05 14:37:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,400 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2021-06-05 14:37:32,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2021-06-05 14:37:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:32,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 14:37:32,402 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1911442418, now seen corresponding path program 2 times [2021-06-05 14:37:32,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093710367] [2021-06-05 14:37:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:32,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093710367] [2021-06-05 14:37:32,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093710367] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:32,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:32,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:37:32,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564699665] [2021-06-05 14:37:32,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:37:32,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:37:32,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:37:32,425 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,438 INFO L93 Difference]: Finished difference Result 347 states and 1054 transitions. [2021-06-05 14:37:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:37:32,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,441 INFO L225 Difference]: With dead ends: 347 [2021-06-05 14:37:32,441 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 14:37:32,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:37:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 14:37:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 14:37:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.2620087336244543) internal successors, (747), 229 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 747 transitions. [2021-06-05 14:37:32,448 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 747 transitions. Word has length 16 [2021-06-05 14:37:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,448 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 747 transitions. [2021-06-05 14:37:32,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 747 transitions. [2021-06-05 14:37:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:32,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,449 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:32,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 14:37:32,449 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-06-05 14:37:32,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:32,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596052794] [2021-06-05 14:37:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:32,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596052794] [2021-06-05 14:37:32,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596052794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465917225] [2021-06-05 14:37:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:32,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:37:32,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:32,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465917225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:32,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:32,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 14:37:32,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386537771] [2021-06-05 14:37:32,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:37:32,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:37:32,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:32,659 INFO L87 Difference]: Start difference. First operand 230 states and 747 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:32,777 INFO L93 Difference]: Finished difference Result 529 states and 1519 transitions. [2021-06-05 14:37:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:37:32,778 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 16 [2021-06-05 14:37:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:32,780 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:37:32,780 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 14:37:32,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:37:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 14:37:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2021-06-05 14:37:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1380753138075312) internal successors, (750), 239 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 750 transitions. [2021-06-05 14:37:32,794 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 750 transitions. Word has length 16 [2021-06-05 14:37:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:32,794 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 750 transitions. [2021-06-05 14:37:32,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 750 transitions. [2021-06-05 14:37:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:32,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:32,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 14:37:33,009 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 3 times [2021-06-05 14:37:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424529215] [2021-06-05 14:37:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:33,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424529215] [2021-06-05 14:37:33,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424529215] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:33,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:33,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:37:33,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80947494] [2021-06-05 14:37:33,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:37:33,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:37:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:37:33,029 INFO L87 Difference]: Start difference. First operand 240 states and 750 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,049 INFO L93 Difference]: Finished difference Result 335 states and 978 transitions. [2021-06-05 14:37:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:37:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,051 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:37:33,051 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 14:37:33,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 14:37:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 234. [2021-06-05 14:37:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.0257510729613735) internal successors, (705), 233 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 705 transitions. [2021-06-05 14:37:33,057 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 705 transitions. Word has length 16 [2021-06-05 14:37:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,058 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 705 transitions. [2021-06-05 14:37:33,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 705 transitions. [2021-06-05 14:37:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:33,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,059 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 14:37:33,059 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 2 times [2021-06-05 14:37:33,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172285881] [2021-06-05 14:37:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:33,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172285881] [2021-06-05 14:37:33,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172285881] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:33,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:33,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:37:33,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181747421] [2021-06-05 14:37:33,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:37:33,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:33,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:37:33,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:37:33,100 INFO L87 Difference]: Start difference. First operand 234 states and 705 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,117 INFO L93 Difference]: Finished difference Result 314 states and 885 transitions. [2021-06-05 14:37:33,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:37:33,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,119 INFO L225 Difference]: With dead ends: 314 [2021-06-05 14:37:33,119 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 14:37:33,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:37:33,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 14:37:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 213. [2021-06-05 14:37:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9669811320754715) internal successors, (629), 212 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-06-05 14:37:33,125 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 16 [2021-06-05 14:37:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,125 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-06-05 14:37:33,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-06-05 14:37:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:33,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,126 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 14:37:33,127 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-06-05 14:37:33,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54108118] [2021-06-05 14:37:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:33,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54108118] [2021-06-05 14:37:33,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54108118] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:33,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:33,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:33,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504362119] [2021-06-05 14:37:33,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:33,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:33,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:33,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:33,192 INFO L87 Difference]: Start difference. First operand 213 states and 629 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,211 INFO L93 Difference]: Finished difference Result 281 states and 773 transitions. [2021-06-05 14:37:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:33,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,212 INFO L225 Difference]: With dead ends: 281 [2021-06-05 14:37:33,212 INFO L226 Difference]: Without dead ends: 240 [2021-06-05 14:37:33,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:37:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-05 14:37:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 209. [2021-06-05 14:37:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2021-06-05 14:37:33,218 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2021-06-05 14:37:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,218 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2021-06-05 14:37:33,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2021-06-05 14:37:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:37:33,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,219 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 14:37:33,220 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-06-05 14:37:33,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318975342] [2021-06-05 14:37:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:33,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318975342] [2021-06-05 14:37:33,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318975342] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:37:33,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:37:33,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:37:33,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155767419] [2021-06-05 14:37:33,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:37:33,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:33,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:37:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:37:33,254 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:33,288 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2021-06-05 14:37:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:37:33,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:37:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:33,298 INFO L225 Difference]: With dead ends: 238 [2021-06-05 14:37:33,298 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 14:37:33,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:37:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 14:37:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-06-05 14:37:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-05 14:37:33,306 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2021-06-05 14:37:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:33,306 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-05 14:37:33,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-05 14:37:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:33,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:33,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:33,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 14:37:33,308 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:33,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-06-05 14:37:33,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:33,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064180702] [2021-06-05 14:37:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:33,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064180702] [2021-06-05 14:37:33,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064180702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:33,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631682486] [2021-06-05 14:37:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:33,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:37:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:34,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631682486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:34,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:34,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:37:34,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976829053] [2021-06-05 14:37:34,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:34,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:34,049 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,157 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 14:37:35,413 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 14:37:35,581 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-05 14:37:35,727 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 14:37:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:35,793 INFO L93 Difference]: Finished difference Result 577 states and 1611 transitions. [2021-06-05 14:37:35,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:37:35,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 20 [2021-06-05 14:37:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:35,797 INFO L225 Difference]: With dead ends: 577 [2021-06-05 14:37:35,797 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 14:37:35,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1684.7ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:37:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 14:37:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 243. [2021-06-05 14:37:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9545454545454546) internal successors, (715), 242 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 715 transitions. [2021-06-05 14:37:35,807 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 715 transitions. Word has length 20 [2021-06-05 14:37:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:35,807 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 715 transitions. [2021-06-05 14:37:35,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 715 transitions. [2021-06-05 14:37:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:35,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:35,811 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:36,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:37:36,027 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 56489052, now seen corresponding path program 2 times [2021-06-05 14:37:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:36,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437696934] [2021-06-05 14:37:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:36,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:36,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437696934] [2021-06-05 14:37:36,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437696934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:36,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989857026] [2021-06-05 14:37:36,174 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:36,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:36,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:36,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:36,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989857026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:36,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:36,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 14:37:36,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145944313] [2021-06-05 14:37:36,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:36,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:36,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:36,563 INFO L87 Difference]: Start difference. First operand 243 states and 715 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:37,118 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-05 14:37:37,821 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 14:37:38,130 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 14:37:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:38,687 INFO L93 Difference]: Finished difference Result 801 states and 2205 transitions. [2021-06-05 14:37:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:37:38,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 20 [2021-06-05 14:37:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:38,691 INFO L225 Difference]: With dead ends: 801 [2021-06-05 14:37:38,691 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:37:38,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1974.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:37:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:37:38,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 284. [2021-06-05 14:37:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-06-05 14:37:38,701 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-06-05 14:37:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:38,701 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-06-05 14:37:38,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:38,701 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-06-05 14:37:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:38,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:38,702 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:38,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:38,926 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 3 times [2021-06-05 14:37:38,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:38,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581991655] [2021-06-05 14:37:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:39,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581991655] [2021-06-05 14:37:39,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581991655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683594278] [2021-06-05 14:37:39,149 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:39,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:39,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:37:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:39,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683594278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:39,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:39,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:37:39,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676936438] [2021-06-05 14:37:39,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:39,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:39,512 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:40,547 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:37:41,313 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-05 14:37:41,486 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 14:37:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:41,566 INFO L93 Difference]: Finished difference Result 766 states and 2175 transitions. [2021-06-05 14:37:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:37:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 20 [2021-06-05 14:37:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:41,570 INFO L225 Difference]: With dead ends: 766 [2021-06-05 14:37:41,570 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 14:37:41,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1881.2ms TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:37:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 14:37:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 303. [2021-06-05 14:37:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9205298013245033) internal successors, (882), 302 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 882 transitions. [2021-06-05 14:37:41,582 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 882 transitions. Word has length 20 [2021-06-05 14:37:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:41,583 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 882 transitions. [2021-06-05 14:37:41,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 882 transitions. [2021-06-05 14:37:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:41,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:41,584 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:41,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:41,808 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash 585717068, now seen corresponding path program 4 times [2021-06-05 14:37:41,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:41,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560548565] [2021-06-05 14:37:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:42,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:42,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560548565] [2021-06-05 14:37:42,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560548565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994126528] [2021-06-05 14:37:42,072 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:42,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:42,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:42,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:42,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994126528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:42,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:42,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 14:37:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688852476] [2021-06-05 14:37:42,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:37:42,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:42,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:37:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:42,459 INFO L87 Difference]: Start difference. First operand 303 states and 882 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:43,726 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-05 14:37:44,341 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 14:37:44,753 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 14:37:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:44,980 INFO L93 Difference]: Finished difference Result 971 states and 2714 transitions. [2021-06-05 14:37:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:37:44,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:44,984 INFO L225 Difference]: With dead ends: 971 [2021-06-05 14:37:44,984 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 14:37:44,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2434.9ms TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:37:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 14:37:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 362. [2021-06-05 14:37:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0554016620498614) internal successors, (1103), 361 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1103 transitions. [2021-06-05 14:37:44,996 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1103 transitions. Word has length 20 [2021-06-05 14:37:44,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:44,996 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1103 transitions. [2021-06-05 14:37:44,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:44,996 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1103 transitions. [2021-06-05 14:37:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:44,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:44,998 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:45,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 14:37:45,213 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 5 times [2021-06-05 14:37:45,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:45,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187961765] [2021-06-05 14:37:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:45,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:45,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187961765] [2021-06-05 14:37:45,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187961765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948179144] [2021-06-05 14:37:45,428 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:45,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:37:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:45,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948179144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:45,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:45,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 14:37:45,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100615365] [2021-06-05 14:37:45,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:37:45,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:45,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:37:45,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:45,694 INFO L87 Difference]: Start difference. First operand 362 states and 1103 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:46,886 INFO L93 Difference]: Finished difference Result 667 states and 1967 transitions. [2021-06-05 14:37:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:37:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 20 [2021-06-05 14:37:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:46,892 INFO L225 Difference]: With dead ends: 667 [2021-06-05 14:37:46,892 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 14:37:46,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:37:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 14:37:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 368. [2021-06-05 14:37:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0544959128065394) internal successors, (1121), 367 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1121 transitions. [2021-06-05 14:37:46,903 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1121 transitions. Word has length 20 [2021-06-05 14:37:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:46,904 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1121 transitions. [2021-06-05 14:37:46,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1121 transitions. [2021-06-05 14:37:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:46,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:46,905 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:47,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,121 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 6 times [2021-06-05 14:37:47,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:47,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310656510] [2021-06-05 14:37:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:47,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:47,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310656510] [2021-06-05 14:37:47,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310656510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086885806] [2021-06-05 14:37:47,255 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:47,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:47,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086885806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:47,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:47,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 14:37:47,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957549039] [2021-06-05 14:37:47,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:47,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:47,591 INFO L87 Difference]: Start difference. First operand 368 states and 1121 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:47,820 INFO L93 Difference]: Finished difference Result 643 states and 1884 transitions. [2021-06-05 14:37:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:37:47,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:47,822 INFO L225 Difference]: With dead ends: 643 [2021-06-05 14:37:47,822 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 14:37:47,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:37:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 14:37:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 374. [2021-06-05 14:37:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.06970509383378) internal successors, (1145), 373 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1145 transitions. [2021-06-05 14:37:47,832 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1145 transitions. Word has length 20 [2021-06-05 14:37:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:47,832 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1145 transitions. [2021-06-05 14:37:47,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1145 transitions. [2021-06-05 14:37:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:47,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:47,833 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:48,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,056 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 685722764, now seen corresponding path program 7 times [2021-06-05 14:37:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:48,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046066312] [2021-06-05 14:37:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:48,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046066312] [2021-06-05 14:37:48,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046066312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:48,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871448264] [2021-06-05 14:37:48,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:48,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:37:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:48,907 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1, ends_with_6], 1=[ends_with_2]} [2021-06-05 14:37:48,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:48,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,925 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 4 treesize of output 2 [2021-06-05 14:37:48,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,930 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 4 treesize of output 2 [2021-06-05 14:37:48,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:48,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:48,939 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:48,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:37:48,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,013 INFO L628 ElimStorePlain]: treesize reduction 83, result has 46.1 percent of original size [2021-06-05 14:37:49,018 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 3 treesize of output 1 [2021-06-05 14:37:49,020 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,059 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-05 14:37:49,062 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 4 treesize of output 2 [2021-06-05 14:37:49,063 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,066 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 3 treesize of output 1 [2021-06-05 14:37:49,067 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:49,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:49,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:49,084 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-05 14:37:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:49,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871448264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:49,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:49,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:37:49,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647002751] [2021-06-05 14:37:49,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:37:49,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:37:49,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:37:49,146 INFO L87 Difference]: Start difference. First operand 374 states and 1145 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,215 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 14:37:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:50,411 INFO L93 Difference]: Finished difference Result 613 states and 1787 transitions. [2021-06-05 14:37:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:37:50,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:50,413 INFO L225 Difference]: With dead ends: 613 [2021-06-05 14:37:50,413 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 14:37:50,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1106.0ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:37:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 14:37:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 384. [2021-06-05 14:37:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0548302872062663) internal successors, (1170), 383 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1170 transitions. [2021-06-05 14:37:50,422 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1170 transitions. Word has length 20 [2021-06-05 14:37:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:50,423 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1170 transitions. [2021-06-05 14:37:50,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1170 transitions. [2021-06-05 14:37:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:50,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:50,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:50,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 14:37:50,645 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 8 times [2021-06-05 14:37:50,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:50,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213816243] [2021-06-05 14:37:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:50,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:50,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213816243] [2021-06-05 14:37:50,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213816243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:50,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041610322] [2021-06-05 14:37:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:50,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:50,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:51,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041610322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:51,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:37:51,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991200000] [2021-06-05 14:37:51,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:51,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:51,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:51,004 INFO L87 Difference]: Start difference. First operand 384 states and 1170 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:51,294 INFO L93 Difference]: Finished difference Result 663 states and 1941 transitions. [2021-06-05 14:37:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:37:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:51,296 INFO L225 Difference]: With dead ends: 663 [2021-06-05 14:37:51,296 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 14:37:51,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 344.2ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 14:37:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 389. [2021-06-05 14:37:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-05 14:37:51,305 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-05 14:37:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:51,305 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-05 14:37:51,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-05 14:37:51,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:51,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:51,306 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:51,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,521 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1287248534, now seen corresponding path program 9 times [2021-06-05 14:37:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:51,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312283789] [2021-06-05 14:37:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:51,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312283789] [2021-06-05 14:37:51,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312283789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402469649] [2021-06-05 14:37:51,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:51,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:37:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:51,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:51,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402469649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:51,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:51,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:37:51,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625020354] [2021-06-05 14:37:51,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:51,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:51,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:51,943 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:52,488 INFO L93 Difference]: Finished difference Result 865 states and 2507 transitions. [2021-06-05 14:37:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:52,491 INFO L225 Difference]: With dead ends: 865 [2021-06-05 14:37:52,491 INFO L226 Difference]: Without dead ends: 722 [2021-06-05 14:37:52,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 605.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:37:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-05 14:37:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 395. [2021-06-05 14:37:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.068527918781726) internal successors, (1209), 394 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1209 transitions. [2021-06-05 14:37:52,501 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1209 transitions. Word has length 20 [2021-06-05 14:37:52,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:52,501 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1209 transitions. [2021-06-05 14:37:52,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1209 transitions. [2021-06-05 14:37:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:52,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:52,502 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:52,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 14:37:52,709 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:52,709 INFO L82 PathProgramCache]: Analyzing trace with hash 326318200, now seen corresponding path program 10 times [2021-06-05 14:37:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:52,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645748565] [2021-06-05 14:37:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:52,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:52,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645748565] [2021-06-05 14:37:52,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645748565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:52,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27600479] [2021-06-05 14:37:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:52,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:52,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:53,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27600479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:53,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:37:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148084418] [2021-06-05 14:37:53,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:37:53,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:53,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:37:53,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:37:53,093 INFO L87 Difference]: Start difference. First operand 395 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:53,399 INFO L93 Difference]: Finished difference Result 717 states and 2094 transitions. [2021-06-05 14:37:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:37:53,400 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:53,401 INFO L225 Difference]: With dead ends: 717 [2021-06-05 14:37:53,401 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 14:37:53,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 14:37:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 389. [2021-06-05 14:37:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-05 14:37:53,410 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-05 14:37:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:53,410 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-05 14:37:53,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-05 14:37:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:53,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:53,411 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:53,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 14:37:53,634 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 11 times [2021-06-05 14:37:53,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:53,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343378537] [2021-06-05 14:37:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:53,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:53,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343378537] [2021-06-05 14:37:53,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343378537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:53,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307258761] [2021-06-05 14:37:53,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:53,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:37:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:54,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307258761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:54,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:54,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:37:54,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937568502] [2021-06-05 14:37:54,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:37:54,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:37:54,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:37:54,052 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:55,711 INFO L93 Difference]: Finished difference Result 980 states and 2855 transitions. [2021-06-05 14:37:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:37:55,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:55,714 INFO L225 Difference]: With dead ends: 980 [2021-06-05 14:37:55,714 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 14:37:55,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1484.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:37:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 14:37:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 442. [2021-06-05 14:37:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-05 14:37:55,724 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-05 14:37:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:55,724 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-05 14:37:55,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-05 14:37:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:55,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:55,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:55,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 14:37:55,948 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:55,948 INFO L82 PathProgramCache]: Analyzing trace with hash -852916892, now seen corresponding path program 12 times [2021-06-05 14:37:55,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:55,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260075096] [2021-06-05 14:37:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:56,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260075096] [2021-06-05 14:37:56,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260075096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556199468] [2021-06-05 14:37:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:56,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:37:56,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:56,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:37:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:56,184 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 3 treesize of output 1 [2021-06-05 14:37:56,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:56,264 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.5 percent of original size [2021-06-05 14:37:56,268 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 3 treesize of output 1 [2021-06-05 14:37:56,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:56,272 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 4 treesize of output 2 [2021-06-05 14:37:56,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:56,327 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.6 percent of original size [2021-06-05 14:37:56,330 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 4 treesize of output 2 [2021-06-05 14:37:56,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:56,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:37:56,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:37:56,356 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:55 [2021-06-05 14:37:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:56,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556199468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:56,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:56,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:37:56,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837602305] [2021-06-05 14:37:56,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:56,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:56,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:56,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:56,707 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:57,147 INFO L93 Difference]: Finished difference Result 830 states and 2406 transitions. [2021-06-05 14:37:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:37:57,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:57,149 INFO L225 Difference]: With dead ends: 830 [2021-06-05 14:37:57,149 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 14:37:57,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 536.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 14:37:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 452. [2021-06-05 14:37:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0776053215077606) internal successors, (1388), 451 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1388 transitions. [2021-06-05 14:37:57,166 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1388 transitions. Word has length 20 [2021-06-05 14:37:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:57,167 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1388 transitions. [2021-06-05 14:37:57,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1388 transitions. [2021-06-05 14:37:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 14:37:57,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:57,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:57,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 14:37:57,385 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1463437194, now seen corresponding path program 13 times [2021-06-05 14:37:57,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:57,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766264125] [2021-06-05 14:37:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:57,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:57,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766264125] [2021-06-05 14:37:57,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766264125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:57,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391936231] [2021-06-05 14:37:57,464 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:37:57,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:57,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391936231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:57,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:57,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:37:57,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714224342] [2021-06-05 14:37:57,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:57,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:57,761 INFO L87 Difference]: Start difference. First operand 452 states and 1388 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:57,902 INFO L93 Difference]: Finished difference Result 595 states and 1752 transitions. [2021-06-05 14:37:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:37:57,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 14:37:57,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:57,904 INFO L225 Difference]: With dead ends: 595 [2021-06-05 14:37:57,904 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:37:57,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:37:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:37:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 442. [2021-06-05 14:37:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-05 14:37:57,913 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-05 14:37:57,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:57,913 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-05 14:37:57,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:57,913 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-05 14:37:57,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:57,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:57,914 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:58,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:58,138 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:58,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:58,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1353227094, now seen corresponding path program 14 times [2021-06-05 14:37:58,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:58,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086398341] [2021-06-05 14:37:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:58,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086398341] [2021-06-05 14:37:58,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086398341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724194023] [2021-06-05 14:37:58,214 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:58,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:37:58,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:37:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:58,316 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 4 treesize of output 2 [2021-06-05 14:37:58,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,320 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 4 treesize of output 2 [2021-06-05 14:37:58,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,324 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 4 treesize of output 2 [2021-06-05 14:37:58,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,367 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:37:58,370 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 4 treesize of output 2 [2021-06-05 14:37:58,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,373 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 3 treesize of output 1 [2021-06-05 14:37:58,374 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:58,405 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:37:58,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:58,407 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:37:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:58,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724194023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:58,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 14:37:58,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403297301] [2021-06-05 14:37:58,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:58,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:58,455 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:58,663 INFO L93 Difference]: Finished difference Result 699 states and 2099 transitions. [2021-06-05 14:37:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:58,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 21 [2021-06-05 14:37:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:58,665 INFO L225 Difference]: With dead ends: 699 [2021-06-05 14:37:58,665 INFO L226 Difference]: Without dead ends: 648 [2021-06-05 14:37:58,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-05 14:37:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 421. [2021-06-05 14:37:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0904761904761906) internal successors, (1298), 420 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1298 transitions. [2021-06-05 14:37:58,674 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1298 transitions. Word has length 21 [2021-06-05 14:37:58,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:58,674 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1298 transitions. [2021-06-05 14:37:58,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1298 transitions. [2021-06-05 14:37:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:58,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:58,675 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:58,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 14:37:58,892 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2142789994, now seen corresponding path program 15 times [2021-06-05 14:37:58,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:58,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089285153] [2021-06-05 14:37:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:58,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:58,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089285153] [2021-06-05 14:37:58,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089285153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:58,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348372178] [2021-06-05 14:37:58,968 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:59,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:37:59,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:59,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:37:59,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:59,075 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 4 treesize of output 2 [2021-06-05 14:37:59,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,079 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 4 treesize of output 2 [2021-06-05 14:37:59,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,083 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 4 treesize of output 2 [2021-06-05 14:37:59,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,127 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:37:59,130 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 4 treesize of output 2 [2021-06-05 14:37:59,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,133 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 3 treesize of output 1 [2021-06-05 14:37:59,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:37:59,161 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:37:59,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:37:59,162 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:37:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:59,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348372178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:59,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:59,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 14:37:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769874505] [2021-06-05 14:37:59,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:37:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:59,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:37:59,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:37:59,218 INFO L87 Difference]: Start difference. First operand 421 states and 1298 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:37:59,447 INFO L93 Difference]: Finished difference Result 665 states and 2020 transitions. [2021-06-05 14:37:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:37:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 21 [2021-06-05 14:37:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:37:59,451 INFO L225 Difference]: With dead ends: 665 [2021-06-05 14:37:59,451 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 14:37:59,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:37:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 14:37:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 432. [2021-06-05 14:37:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1113689095127612) internal successors, (1341), 431 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1341 transitions. [2021-06-05 14:37:59,461 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1341 transitions. Word has length 21 [2021-06-05 14:37:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:37:59,462 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1341 transitions. [2021-06-05 14:37:59,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:37:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1341 transitions. [2021-06-05 14:37:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:37:59,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:37:59,463 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:37:59,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:59,685 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:37:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:37:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash -967299350, now seen corresponding path program 16 times [2021-06-05 14:37:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:37:59,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874002224] [2021-06-05 14:37:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:37:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:37:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:37:59,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:37:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874002224] [2021-06-05 14:37:59,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874002224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:59,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338570676] [2021-06-05 14:37:59,770 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:37:59,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:37:59,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:37:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:37:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:37:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:37:59,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338570676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:37:59,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:37:59,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 14:37:59,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449681306] [2021-06-05 14:37:59,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:37:59,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:37:59,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:37:59,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:37:59,927 INFO L87 Difference]: Start difference. First operand 432 states and 1341 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:00,136 INFO L93 Difference]: Finished difference Result 728 states and 2188 transitions. [2021-06-05 14:38:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:00,137 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 21 [2021-06-05 14:38:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:00,139 INFO L225 Difference]: With dead ends: 728 [2021-06-05 14:38:00,139 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 14:38:00,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:00,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 14:38:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 443. [2021-06-05 14:38:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1561085972850678) internal successors, (1395), 442 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1395 transitions. [2021-06-05 14:38:00,149 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1395 transitions. Word has length 21 [2021-06-05 14:38:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:00,149 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1395 transitions. [2021-06-05 14:38:00,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1395 transitions. [2021-06-05 14:38:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:00,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:00,150 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:00,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 14:38:00,365 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:00,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:00,365 INFO L82 PathProgramCache]: Analyzing trace with hash 646267384, now seen corresponding path program 17 times [2021-06-05 14:38:00,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:00,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122162820] [2021-06-05 14:38:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:00,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:00,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122162820] [2021-06-05 14:38:00,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122162820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814451285] [2021-06-05 14:38:00,437 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:00,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:00,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814451285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:00,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:00,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 14:38:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148487662] [2021-06-05 14:38:00,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:00,632 INFO L87 Difference]: Start difference. First operand 443 states and 1395 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:00,967 INFO L93 Difference]: Finished difference Result 654 states and 1967 transitions. [2021-06-05 14:38:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:00,967 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 21 [2021-06-05 14:38:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:00,969 INFO L225 Difference]: With dead ends: 654 [2021-06-05 14:38:00,970 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 14:38:00,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 14:38:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 413. [2021-06-05 14:38:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0728155339805827) internal successors, (1266), 412 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1266 transitions. [2021-06-05 14:38:00,979 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1266 transitions. Word has length 21 [2021-06-05 14:38:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:00,979 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1266 transitions. [2021-06-05 14:38:00,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1266 transitions. [2021-06-05 14:38:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:00,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:00,980 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:01,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 14:38:01,197 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:01,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1289968066, now seen corresponding path program 18 times [2021-06-05 14:38:01,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:01,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170866319] [2021-06-05 14:38:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:01,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:01,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170866319] [2021-06-05 14:38:01,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170866319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253753756] [2021-06-05 14:38:01,296 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:01,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:01,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:01,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:01,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:01,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253753756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:01,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:01,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 14:38:01,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984937591] [2021-06-05 14:38:01,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:01,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:01,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:01,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:01,522 INFO L87 Difference]: Start difference. First operand 413 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:01,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:01,977 INFO L93 Difference]: Finished difference Result 864 states and 2562 transitions. [2021-06-05 14:38:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:01,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 21 [2021-06-05 14:38:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:01,990 INFO L225 Difference]: With dead ends: 864 [2021-06-05 14:38:01,991 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 14:38:01,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 14:38:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2021-06-05 14:38:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1684901531728666) internal successors, (1448), 457 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1448 transitions. [2021-06-05 14:38:02,001 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1448 transitions. Word has length 21 [2021-06-05 14:38:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:02,001 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1448 transitions. [2021-06-05 14:38:02,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1448 transitions. [2021-06-05 14:38:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:02,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:02,002 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:02,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:02,217 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:02,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:02,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1898744654, now seen corresponding path program 19 times [2021-06-05 14:38:02,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:02,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984896774] [2021-06-05 14:38:02,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984896774] [2021-06-05 14:38:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984896774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383665713] [2021-06-05 14:38:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:02,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:02,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383665713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:02,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:02,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 14:38:02,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563122477] [2021-06-05 14:38:02,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:02,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:02,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:02,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:02,495 INFO L87 Difference]: Start difference. First operand 458 states and 1448 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:03,051 INFO L93 Difference]: Finished difference Result 906 states and 2628 transitions. [2021-06-05 14:38:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:03,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 21 [2021-06-05 14:38:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:03,054 INFO L225 Difference]: With dead ends: 906 [2021-06-05 14:38:03,054 INFO L226 Difference]: Without dead ends: 837 [2021-06-05 14:38:03,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-06-05 14:38:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 464. [2021-06-05 14:38:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-06-05 14:38:03,065 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-06-05 14:38:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:03,065 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-06-05 14:38:03,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-06-05 14:38:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:03,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:03,066 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:03,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 14:38:03,281 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1066038364, now seen corresponding path program 20 times [2021-06-05 14:38:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:03,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765046962] [2021-06-05 14:38:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:03,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:03,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765046962] [2021-06-05 14:38:03,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765046962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:03,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493578510] [2021-06-05 14:38:03,371 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:03,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:03,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:03,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:03,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493578510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:03,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:03,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 14:38:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822354961] [2021-06-05 14:38:03,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:03,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:03,589 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:03,971 INFO L93 Difference]: Finished difference Result 795 states and 2331 transitions. [2021-06-05 14:38:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:03,973 INFO L225 Difference]: With dead ends: 795 [2021-06-05 14:38:03,973 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 14:38:03,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 14:38:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 471. [2021-06-05 14:38:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0914893617021275) internal successors, (1453), 470 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1453 transitions. [2021-06-05 14:38:03,981 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1453 transitions. Word has length 21 [2021-06-05 14:38:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:03,981 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1453 transitions. [2021-06-05 14:38:03,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1453 transitions. [2021-06-05 14:38:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:03,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:03,982 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:04,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 14:38:04,204 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:04,204 INFO L82 PathProgramCache]: Analyzing trace with hash 601158056, now seen corresponding path program 21 times [2021-06-05 14:38:04,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:04,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216003446] [2021-06-05 14:38:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:04,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216003446] [2021-06-05 14:38:04,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216003446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463772338] [2021-06-05 14:38:04,286 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:04,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:04,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:04,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:04,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:04,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463772338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:04,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:04,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 14:38:04,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532638641] [2021-06-05 14:38:04,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:04,485 INFO L87 Difference]: Start difference. First operand 471 states and 1453 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:04,857 INFO L93 Difference]: Finished difference Result 773 states and 2266 transitions. [2021-06-05 14:38:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 21 [2021-06-05 14:38:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:04,859 INFO L225 Difference]: With dead ends: 773 [2021-06-05 14:38:04,859 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 14:38:04,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 14:38:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 462. [2021-06-05 14:38:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0390455531453364) internal successors, (1401), 461 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1401 transitions. [2021-06-05 14:38:04,865 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1401 transitions. Word has length 21 [2021-06-05 14:38:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:04,865 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1401 transitions. [2021-06-05 14:38:04,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1401 transitions. [2021-06-05 14:38:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:04,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:04,866 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:05,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:05,067 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash 454395940, now seen corresponding path program 22 times [2021-06-05 14:38:05,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:05,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392853807] [2021-06-05 14:38:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:05,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:05,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392853807] [2021-06-05 14:38:05,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392853807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:05,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369579318] [2021-06-05 14:38:05,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:05,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:05,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:05,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:05,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:05,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369579318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:05,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:05,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 14:38:05,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534238479] [2021-06-05 14:38:05,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:05,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:05,356 INFO L87 Difference]: Start difference. First operand 462 states and 1401 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:05,570 INFO L93 Difference]: Finished difference Result 807 states and 2396 transitions. [2021-06-05 14:38:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 21 [2021-06-05 14:38:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:05,571 INFO L225 Difference]: With dead ends: 807 [2021-06-05 14:38:05,572 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 14:38:05,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:05,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 14:38:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 506. [2021-06-05 14:38:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.130693069306931) internal successors, (1581), 505 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1581 transitions. [2021-06-05 14:38:05,579 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1581 transitions. Word has length 21 [2021-06-05 14:38:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:05,579 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1581 transitions. [2021-06-05 14:38:05,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1581 transitions. [2021-06-05 14:38:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:05,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:05,580 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:05,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 14:38:05,790 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash -651858636, now seen corresponding path program 23 times [2021-06-05 14:38:05,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:05,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126167203] [2021-06-05 14:38:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:05,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:05,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126167203] [2021-06-05 14:38:05,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126167203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:05,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467248845] [2021-06-05 14:38:05,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:05,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:05,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467248845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:06,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 14:38:06,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537336768] [2021-06-05 14:38:06,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:06,116 INFO L87 Difference]: Start difference. First operand 506 states and 1581 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:06,501 INFO L93 Difference]: Finished difference Result 851 states and 2469 transitions. [2021-06-05 14:38:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:06,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:06,502 INFO L225 Difference]: With dead ends: 851 [2021-06-05 14:38:06,503 INFO L226 Difference]: Without dead ends: 782 [2021-06-05 14:38:06,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-05 14:38:06,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 491. [2021-06-05 14:38:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.0816326530612246) internal successors, (1510), 490 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1510 transitions. [2021-06-05 14:38:06,512 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1510 transitions. Word has length 21 [2021-06-05 14:38:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:06,512 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1510 transitions. [2021-06-05 14:38:06,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1510 transitions. [2021-06-05 14:38:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:06,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:06,513 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:06,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 14:38:06,714 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:06,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1484564926, now seen corresponding path program 24 times [2021-06-05 14:38:06,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:06,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216804571] [2021-06-05 14:38:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:06,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216804571] [2021-06-05 14:38:06,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216804571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065756822] [2021-06-05 14:38:06,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:06,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:06,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:06,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065756822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:07,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:38:07,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6444998] [2021-06-05 14:38:07,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:07,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:07,028 INFO L87 Difference]: Start difference. First operand 491 states and 1510 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:07,332 INFO L93 Difference]: Finished difference Result 682 states and 1999 transitions. [2021-06-05 14:38:07,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:07,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 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 21 [2021-06-05 14:38:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:07,333 INFO L225 Difference]: With dead ends: 682 [2021-06-05 14:38:07,333 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 14:38:07,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 14:38:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 476. [2021-06-05 14:38:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0442105263157893) internal successors, (1446), 475 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1446 transitions. [2021-06-05 14:38:07,341 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1446 transitions. Word has length 21 [2021-06-05 14:38:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:07,341 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1446 transitions. [2021-06-05 14:38:07,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1446 transitions. [2021-06-05 14:38:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:07,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:07,342 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:07,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 14:38:07,545 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:07,545 INFO L82 PathProgramCache]: Analyzing trace with hash -818537768, now seen corresponding path program 25 times [2021-06-05 14:38:07,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:07,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016442361] [2021-06-05 14:38:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:07,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016442361] [2021-06-05 14:38:07,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016442361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697876701] [2021-06-05 14:38:07,623 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:07,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:07,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697876701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:07,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:07,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 14:38:07,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255055505] [2021-06-05 14:38:07,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:07,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:07,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:07,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:07,778 INFO L87 Difference]: Start difference. First operand 476 states and 1446 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:07,986 INFO L93 Difference]: Finished difference Result 853 states and 2541 transitions. [2021-06-05 14:38:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 21 [2021-06-05 14:38:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:07,988 INFO L225 Difference]: With dead ends: 853 [2021-06-05 14:38:07,988 INFO L226 Difference]: Without dead ends: 801 [2021-06-05 14:38:07,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:07,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-06-05 14:38:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 514. [2021-06-05 14:38:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.142300194931774) internal successors, (1612), 513 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1612 transitions. [2021-06-05 14:38:07,996 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1612 transitions. Word has length 21 [2021-06-05 14:38:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:07,996 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1612 transitions. [2021-06-05 14:38:07,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1612 transitions. [2021-06-05 14:38:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:07,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:07,997 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:08,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:08,207 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:08,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1924792344, now seen corresponding path program 26 times [2021-06-05 14:38:08,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:08,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830345661] [2021-06-05 14:38:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:08,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:08,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830345661] [2021-06-05 14:38:08,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830345661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:08,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381989028] [2021-06-05 14:38:08,285 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:08,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:08,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381989028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:08,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:08,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 14:38:08,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651288769] [2021-06-05 14:38:08,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:08,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:08,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:08,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:08,442 INFO L87 Difference]: Start difference. First operand 514 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:08,737 INFO L93 Difference]: Finished difference Result 772 states and 2308 transitions. [2021-06-05 14:38:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 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 21 [2021-06-05 14:38:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:08,738 INFO L225 Difference]: With dead ends: 772 [2021-06-05 14:38:08,738 INFO L226 Difference]: Without dead ends: 703 [2021-06-05 14:38:08,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-05 14:38:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 501. [2021-06-05 14:38:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.092) internal successors, (1546), 500 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1546 transitions. [2021-06-05 14:38:08,746 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1546 transitions. Word has length 21 [2021-06-05 14:38:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:08,746 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1546 transitions. [2021-06-05 14:38:08,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1546 transitions. [2021-06-05 14:38:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:08,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:08,747 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:08,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 14:38:08,949 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash 941515172, now seen corresponding path program 27 times [2021-06-05 14:38:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:08,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629062930] [2021-06-05 14:38:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629062930] [2021-06-05 14:38:09,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629062930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455768924] [2021-06-05 14:38:09,045 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:09,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:09,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:09,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455768924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:09,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-05 14:38:09,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146834322] [2021-06-05 14:38:09,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:09,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:09,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:09,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:09,198 INFO L87 Difference]: Start difference. First operand 501 states and 1546 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:09,389 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-06-05 14:38:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 21 [2021-06-05 14:38:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:09,390 INFO L225 Difference]: With dead ends: 688 [2021-06-05 14:38:09,390 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 14:38:09,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:38:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 14:38:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 481. [2021-06-05 14:38:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0625) internal successors, (1470), 480 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1470 transitions. [2021-06-05 14:38:09,397 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1470 transitions. Word has length 21 [2021-06-05 14:38:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:09,397 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1470 transitions. [2021-06-05 14:38:09,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1470 transitions. [2021-06-05 14:38:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:09,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:09,398 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:09,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:09,598 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:09,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1149829974, now seen corresponding path program 28 times [2021-06-05 14:38:09,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:09,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833939285] [2021-06-05 14:38:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:09,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:09,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833939285] [2021-06-05 14:38:09,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833939285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:09,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196210377] [2021-06-05 14:38:09,755 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:09,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:09,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:09,859 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 4 treesize of output 2 [2021-06-05 14:38:09,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:09,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:09,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:38:09,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2021-06-05 14:38:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:10,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196210377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:10,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:10,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:38:10,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397542190] [2021-06-05 14:38:10,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:10,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:10,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:10,030 INFO L87 Difference]: Start difference. First operand 481 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:10,876 INFO L93 Difference]: Finished difference Result 800 states and 2393 transitions. [2021-06-05 14:38:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:38:10,877 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 21 [2021-06-05 14:38:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:10,878 INFO L225 Difference]: With dead ends: 800 [2021-06-05 14:38:10,878 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 14:38:10,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:38:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 14:38:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 466. [2021-06-05 14:38:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0602150537634407) internal successors, (1423), 465 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1423 transitions. [2021-06-05 14:38:10,884 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1423 transitions. Word has length 21 [2021-06-05 14:38:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:10,884 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1423 transitions. [2021-06-05 14:38:10,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1423 transitions. [2021-06-05 14:38:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:10,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:10,885 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:11,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 14:38:11,086 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:11,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:11,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1969646678, now seen corresponding path program 29 times [2021-06-05 14:38:11,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:11,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115933810] [2021-06-05 14:38:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115933810] [2021-06-05 14:38:11,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115933810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664999492] [2021-06-05 14:38:11,173 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:11,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:11,259 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 4 treesize of output 2 [2021-06-05 14:38:11,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:11,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:38:11,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-05 14:38:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664999492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:11,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 14:38:11,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742105379] [2021-06-05 14:38:11,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:11,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:11,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:11,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:11,447 INFO L87 Difference]: Start difference. First operand 466 states and 1423 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:11,614 INFO L93 Difference]: Finished difference Result 732 states and 2198 transitions. [2021-06-05 14:38:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:38:11,615 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 21 [2021-06-05 14:38:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:11,616 INFO L225 Difference]: With dead ends: 732 [2021-06-05 14:38:11,616 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 14:38:11,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 14:38:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 480. [2021-06-05 14:38:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1022964509394573) internal successors, (1486), 479 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1486 transitions. [2021-06-05 14:38:11,622 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1486 transitions. Word has length 21 [2021-06-05 14:38:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:11,623 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1486 transitions. [2021-06-05 14:38:11,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1486 transitions. [2021-06-05 14:38:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:11,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:11,623 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:11,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:11,824 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash -356079944, now seen corresponding path program 30 times [2021-06-05 14:38:11,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:11,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821544553] [2021-06-05 14:38:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:11,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:11,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821544553] [2021-06-05 14:38:11,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821544553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:11,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675830680] [2021-06-05 14:38:11,902 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:11,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:11,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:11,978 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 4 treesize of output 2 [2021-06-05 14:38:11,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:11,998 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.0 percent of original size [2021-06-05 14:38:11,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:11,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:18 [2021-06-05 14:38:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:12,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675830680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:12,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 14:38:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085583354] [2021-06-05 14:38:12,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:12,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:12,171 INFO L87 Difference]: Start difference. First operand 480 states and 1486 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:12,307 INFO L93 Difference]: Finished difference Result 663 states and 1991 transitions. [2021-06-05 14:38:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:12,307 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 21 [2021-06-05 14:38:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:12,309 INFO L225 Difference]: With dead ends: 663 [2021-06-05 14:38:12,309 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 14:38:12,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 14:38:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 446. [2021-06-05 14:38:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0584269662921346) internal successors, (1361), 445 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1361 transitions. [2021-06-05 14:38:12,317 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1361 transitions. Word has length 21 [2021-06-05 14:38:12,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:12,317 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1361 transitions. [2021-06-05 14:38:12,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1361 transitions. [2021-06-05 14:38:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:12,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:12,318 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:12,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 14:38:12,519 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:12,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:12,519 INFO L82 PathProgramCache]: Analyzing trace with hash 110824918, now seen corresponding path program 31 times [2021-06-05 14:38:12,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:12,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697268459] [2021-06-05 14:38:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:12,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:12,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697268459] [2021-06-05 14:38:12,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697268459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811389877] [2021-06-05 14:38:12,597 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:12,702 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 4 treesize of output 2 [2021-06-05 14:38:12,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,707 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 4 treesize of output 2 [2021-06-05 14:38:12,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,711 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 3 treesize of output 1 [2021-06-05 14:38:12,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,715 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 4 treesize of output 2 [2021-06-05 14:38:12,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:12,764 INFO L628 ElimStorePlain]: treesize reduction 40, result has 56.5 percent of original size [2021-06-05 14:38:12,764 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:38:12,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:12,765 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:107, output treesize:52 [2021-06-05 14:38:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:12,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811389877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:12,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:12,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 14:38:12,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612144803] [2021-06-05 14:38:12,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:12,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:12,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:12,873 INFO L87 Difference]: Start difference. First operand 446 states and 1361 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:13,079 INFO L93 Difference]: Finished difference Result 613 states and 1807 transitions. [2021-06-05 14:38:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:13,079 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 21 [2021-06-05 14:38:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:13,080 INFO L225 Difference]: With dead ends: 613 [2021-06-05 14:38:13,080 INFO L226 Difference]: Without dead ends: 561 [2021-06-05 14:38:13,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-05 14:38:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 431. [2021-06-05 14:38:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.041860465116279) internal successors, (1308), 430 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1308 transitions. [2021-06-05 14:38:13,088 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1308 transitions. Word has length 21 [2021-06-05 14:38:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:13,089 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1308 transitions. [2021-06-05 14:38:13,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1308 transitions. [2021-06-05 14:38:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:13,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:13,090 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:13,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 14:38:13,312 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1724391652, now seen corresponding path program 32 times [2021-06-05 14:38:13,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:13,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978790672] [2021-06-05 14:38:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:13,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:13,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978790672] [2021-06-05 14:38:13,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978790672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673293508] [2021-06-05 14:38:13,493 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:13,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:13,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673293508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:13,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:13,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 14:38:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625670389] [2021-06-05 14:38:13,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:13,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:13,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:13,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:13,779 INFO L87 Difference]: Start difference. First operand 431 states and 1308 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:14,755 INFO L93 Difference]: Finished difference Result 819 states and 2339 transitions. [2021-06-05 14:38:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:38:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 21 [2021-06-05 14:38:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:14,757 INFO L225 Difference]: With dead ends: 819 [2021-06-05 14:38:14,757 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 14:38:14,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 969.0ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:38:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 14:38:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 427. [2021-06-05 14:38:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0) internal successors, (1278), 426 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1278 transitions. [2021-06-05 14:38:14,767 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1278 transitions. Word has length 21 [2021-06-05 14:38:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:14,767 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1278 transitions. [2021-06-05 14:38:14,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:14,767 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1278 transitions. [2021-06-05 14:38:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:14,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:14,768 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:14,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:14,981 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:14,981 INFO L82 PathProgramCache]: Analyzing trace with hash -214051430, now seen corresponding path program 33 times [2021-06-05 14:38:14,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:14,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354103576] [2021-06-05 14:38:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:15,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:15,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354103576] [2021-06-05 14:38:15,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354103576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:15,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973839088] [2021-06-05 14:38:15,055 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:15,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:38:15,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:15,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:15,154 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 3 treesize of output 1 [2021-06-05 14:38:15,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,231 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 14:38:15,234 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 4 treesize of output 2 [2021-06-05 14:38:15,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,238 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 3 treesize of output 1 [2021-06-05 14:38:15,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:15,269 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 4 treesize of output 2 [2021-06-05 14:38:15,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:15,310 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2021-06-05 14:38:15,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:38:15,315 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:49 [2021-06-05 14:38:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:15,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973839088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:15,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:15,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 14:38:15,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191638316] [2021-06-05 14:38:15,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:15,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:15,412 INFO L87 Difference]: Start difference. First operand 427 states and 1278 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:15,673 INFO L93 Difference]: Finished difference Result 542 states and 1584 transitions. [2021-06-05 14:38:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 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 21 [2021-06-05 14:38:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:15,674 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:38:15,674 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:38:15,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:38:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 385. [2021-06-05 14:38:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0) internal successors, (1152), 384 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1152 transitions. [2021-06-05 14:38:15,681 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1152 transitions. Word has length 21 [2021-06-05 14:38:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:15,681 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1152 transitions. [2021-06-05 14:38:15,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1152 transitions. [2021-06-05 14:38:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:15,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:15,682 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:15,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 14:38:15,885 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1805824578, now seen corresponding path program 34 times [2021-06-05 14:38:15,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:15,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594154577] [2021-06-05 14:38:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:38:15,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:15,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594154577] [2021-06-05 14:38:15,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594154577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:15,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850539210] [2021-06-05 14:38:15,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:16,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:16,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:16,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850539210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:16,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:16,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:38:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025627747] [2021-06-05 14:38:16,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:16,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:16,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:16,157 INFO L87 Difference]: Start difference. First operand 385 states and 1152 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:17,206 INFO L93 Difference]: Finished difference Result 1027 states and 2935 transitions. [2021-06-05 14:38:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:38:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 21 [2021-06-05 14:38:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:17,208 INFO L225 Difference]: With dead ends: 1027 [2021-06-05 14:38:17,209 INFO L226 Difference]: Without dead ends: 876 [2021-06-05 14:38:17,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 910.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:38:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-06-05 14:38:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 395. [2021-06-05 14:38:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-05 14:38:17,219 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-05 14:38:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:17,219 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-05 14:38:17,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-05 14:38:17,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:17,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:17,220 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:17,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:17,437 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1761625290, now seen corresponding path program 35 times [2021-06-05 14:38:17,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:17,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637585943] [2021-06-05 14:38:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637585943] [2021-06-05 14:38:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637585943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780128807] [2021-06-05 14:38:17,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:17,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:17,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:17,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:17,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780128807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:17,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:17,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 14:38:17,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003354955] [2021-06-05 14:38:17,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:17,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:17,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:17,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:17,701 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:18,063 INFO L93 Difference]: Finished difference Result 561 states and 1670 transitions. [2021-06-05 14:38:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:18,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:18,064 INFO L225 Difference]: With dead ends: 561 [2021-06-05 14:38:18,064 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 14:38:18,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 14:38:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 404. [2021-06-05 14:38:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0124069478908186) internal successors, (1214), 403 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1214 transitions. [2021-06-05 14:38:18,072 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1214 transitions. Word has length 21 [2021-06-05 14:38:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:18,072 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1214 transitions. [2021-06-05 14:38:18,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1214 transitions. [2021-06-05 14:38:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:18,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:18,073 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:18,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 14:38:18,289 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:18,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:18,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1539064924, now seen corresponding path program 36 times [2021-06-05 14:38:18,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:18,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398887564] [2021-06-05 14:38:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:18,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:18,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398887564] [2021-06-05 14:38:18,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398887564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:18,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592934047] [2021-06-05 14:38:18,405 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:18,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:18,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592934047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-05 14:38:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987569769] [2021-06-05 14:38:18,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:18,610 INFO L87 Difference]: Start difference. First operand 404 states and 1214 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:18,923 INFO L93 Difference]: Finished difference Result 648 states and 1890 transitions. [2021-06-05 14:38:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:18,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:18,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:18,924 INFO L225 Difference]: With dead ends: 648 [2021-06-05 14:38:18,924 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:38:18,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:38:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 433. [2021-06-05 14:38:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0300925925925926) internal successors, (1309), 432 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1309 transitions. [2021-06-05 14:38:18,930 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1309 transitions. Word has length 21 [2021-06-05 14:38:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:18,930 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1309 transitions. [2021-06-05 14:38:18,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1309 transitions. [2021-06-05 14:38:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:18,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:18,931 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:19,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:19,131 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1609295264, now seen corresponding path program 37 times [2021-06-05 14:38:19,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:19,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143050383] [2021-06-05 14:38:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:19,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:19,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143050383] [2021-06-05 14:38:19,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143050383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913646125] [2021-06-05 14:38:19,256 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:19,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:19,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913646125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:19,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 14:38:19,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597388174] [2021-06-05 14:38:19,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:19,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:19,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:19,427 INFO L87 Difference]: Start difference. First operand 433 states and 1309 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:19,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:19,665 INFO L93 Difference]: Finished difference Result 583 states and 1717 transitions. [2021-06-05 14:38:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 21 [2021-06-05 14:38:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:19,667 INFO L225 Difference]: With dead ends: 583 [2021-06-05 14:38:19,667 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:38:19,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:38:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 395. [2021-06-05 14:38:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-05 14:38:19,672 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-05 14:38:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:19,672 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-05 14:38:19,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-05 14:38:19,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:19,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:19,673 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:19,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 14:38:19,873 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:19,874 INFO L82 PathProgramCache]: Analyzing trace with hash 927641802, now seen corresponding path program 38 times [2021-06-05 14:38:19,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:19,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896798889] [2021-06-05 14:38:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:38:19,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:19,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896798889] [2021-06-05 14:38:19,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896798889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:19,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772965125] [2021-06-05 14:38:19,968 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:20,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:20,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:20,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:20,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:20,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772965125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:20,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:20,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:38:20,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402637844] [2021-06-05 14:38:20,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:20,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:20,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:20,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:20,193 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:20,874 INFO L93 Difference]: Finished difference Result 659 states and 1867 transitions. [2021-06-05 14:38:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:38:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 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 21 [2021-06-05 14:38:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:20,875 INFO L225 Difference]: With dead ends: 659 [2021-06-05 14:38:20,876 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:38:20,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:38:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:38:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 388. [2021-06-05 14:38:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.992248062015504) internal successors, (1158), 387 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1158 transitions. [2021-06-05 14:38:20,881 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1158 transitions. Word has length 21 [2021-06-05 14:38:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:20,881 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1158 transitions. [2021-06-05 14:38:20,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1158 transitions. [2021-06-05 14:38:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:20,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:20,882 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:21,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 14:38:21,095 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:21,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:21,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1063950666, now seen corresponding path program 39 times [2021-06-05 14:38:21,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:21,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193956791] [2021-06-05 14:38:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:21,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193956791] [2021-06-05 14:38:21,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193956791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857500960] [2021-06-05 14:38:21,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:21,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:21,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857500960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:21,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:38:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567376379] [2021-06-05 14:38:21,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:21,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:21,418 INFO L87 Difference]: Start difference. First operand 388 states and 1158 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:22,649 INFO L93 Difference]: Finished difference Result 733 states and 2120 transitions. [2021-06-05 14:38:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:38:22,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:38:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:22,651 INFO L225 Difference]: With dead ends: 733 [2021-06-05 14:38:22,651 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 14:38:22,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:38:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 14:38:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 370. [2021-06-05 14:38:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.97289972899729) internal successors, (1097), 369 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1097 transitions. [2021-06-05 14:38:22,658 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1097 transitions. Word has length 21 [2021-06-05 14:38:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:22,659 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1097 transitions. [2021-06-05 14:38:22,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1097 transitions. [2021-06-05 14:38:22,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:22,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:22,660 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:22,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:22,873 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:22,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1824010934, now seen corresponding path program 40 times [2021-06-05 14:38:22,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:22,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996952617] [2021-06-05 14:38:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:22,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:22,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996952617] [2021-06-05 14:38:22,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996952617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:22,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765330578] [2021-06-05 14:38:22,977 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:23,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:23,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:23,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765330578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:23,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:23,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:38:23,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555618863] [2021-06-05 14:38:23,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:23,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:23,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:23,179 INFO L87 Difference]: Start difference. First operand 370 states and 1097 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:24,158 INFO L93 Difference]: Finished difference Result 858 states and 2494 transitions. [2021-06-05 14:38:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:38:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 21 [2021-06-05 14:38:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:24,160 INFO L225 Difference]: With dead ends: 858 [2021-06-05 14:38:24,160 INFO L226 Difference]: Without dead ends: 761 [2021-06-05 14:38:24,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 734.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:38:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-05 14:38:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2021-06-05 14:38:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.025706940874036) internal successors, (1177), 389 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1177 transitions. [2021-06-05 14:38:24,166 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1177 transitions. Word has length 21 [2021-06-05 14:38:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:24,166 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1177 transitions. [2021-06-05 14:38:24,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1177 transitions. [2021-06-05 14:38:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:24,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:24,167 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:24,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:24,367 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash -223501882, now seen corresponding path program 41 times [2021-06-05 14:38:24,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:24,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883967258] [2021-06-05 14:38:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:24,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:24,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883967258] [2021-06-05 14:38:24,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883967258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:24,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047064852] [2021-06-05 14:38:24,446 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:24,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:24,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:24,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047064852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:24,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:24,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:38:24,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696158038] [2021-06-05 14:38:24,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:24,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:24,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:24,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:24,599 INFO L87 Difference]: Start difference. First operand 390 states and 1177 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:25,479 INFO L93 Difference]: Finished difference Result 851 states and 2515 transitions. [2021-06-05 14:38:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:38:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 21 [2021-06-05 14:38:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:25,481 INFO L225 Difference]: With dead ends: 851 [2021-06-05 14:38:25,481 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 14:38:25,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 659.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:38:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 14:38:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 400. [2021-06-05 14:38:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0526315789473686) internal successors, (1218), 399 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1218 transitions. [2021-06-05 14:38:25,490 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1218 transitions. Word has length 21 [2021-06-05 14:38:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:25,490 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1218 transitions. [2021-06-05 14:38:25,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1218 transitions. [2021-06-05 14:38:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:25,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:25,491 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:25,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 14:38:25,705 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash 59224522, now seen corresponding path program 42 times [2021-06-05 14:38:25,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:25,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297856323] [2021-06-05 14:38:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:25,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:25,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297856323] [2021-06-05 14:38:25,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297856323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:25,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329137019] [2021-06-05 14:38:25,788 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:25,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:25,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329137019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:25,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:25,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:38:25,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281166166] [2021-06-05 14:38:25,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:25,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:25,966 INFO L87 Difference]: Start difference. First operand 400 states and 1218 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:26,676 INFO L93 Difference]: Finished difference Result 777 states and 2233 transitions. [2021-06-05 14:38:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:38:26,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 21 [2021-06-05 14:38:26,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:26,678 INFO L225 Difference]: With dead ends: 777 [2021-06-05 14:38:26,678 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 14:38:26,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:38:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 14:38:26,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 385. [2021-06-05 14:38:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.9817708333333335) internal successors, (1145), 384 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1145 transitions. [2021-06-05 14:38:26,684 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1145 transitions. Word has length 21 [2021-06-05 14:38:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:26,684 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1145 transitions. [2021-06-05 14:38:26,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1145 transitions. [2021-06-05 14:38:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:38:26,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:26,685 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:26,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:26,886 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -191892094, now seen corresponding path program 43 times [2021-06-05 14:38:26,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:26,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950451494] [2021-06-05 14:38:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:26,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:26,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950451494] [2021-06-05 14:38:26,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950451494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:26,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551248762] [2021-06-05 14:38:26,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:38:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:27,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551248762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:27,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:27,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 14:38:27,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918187772] [2021-06-05 14:38:27,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:38:27,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:27,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:38:27,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:38:27,130 INFO L87 Difference]: Start difference. First operand 385 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:27,747 INFO L93 Difference]: Finished difference Result 528 states and 1542 transitions. [2021-06-05 14:38:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:38:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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 21 [2021-06-05 14:38:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:27,748 INFO L225 Difference]: With dead ends: 528 [2021-06-05 14:38:27,748 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:38:27,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 483.5ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:38:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:38:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 304. [2021-06-05 14:38:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-06-05 14:38:27,754 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 21 [2021-06-05 14:38:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:27,754 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-06-05 14:38:27,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-06-05 14:38:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:27,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:27,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:27,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:27,955 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1148844402, now seen corresponding path program 44 times [2021-06-05 14:38:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:27,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681462425] [2021-06-05 14:38:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:28,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:28,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681462425] [2021-06-05 14:38:28,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681462425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:28,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952043399] [2021-06-05 14:38:28,040 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 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 [2021-06-05 14:38:28,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:28,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:28,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:28,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952043399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:28,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:28,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 14:38:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355208840] [2021-06-05 14:38:28,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:28,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:28,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:28,326 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:29,026 INFO L93 Difference]: Finished difference Result 791 states and 2249 transitions. [2021-06-05 14:38:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:29,027 INFO L225 Difference]: With dead ends: 791 [2021-06-05 14:38:29,027 INFO L226 Difference]: Without dead ends: 673 [2021-06-05 14:38:29,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 758.5ms TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-05 14:38:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 311. [2021-06-05 14:38:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.97741935483871) internal successors, (923), 310 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 923 transitions. [2021-06-05 14:38:29,032 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 923 transitions. Word has length 22 [2021-06-05 14:38:29,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:29,032 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 923 transitions. [2021-06-05 14:38:29,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,032 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 923 transitions. [2021-06-05 14:38:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:29,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:29,033 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:29,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 14:38:29,255 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:29,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1439910460, now seen corresponding path program 45 times [2021-06-05 14:38:29,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:29,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615571987] [2021-06-05 14:38:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:29,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:29,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615571987] [2021-06-05 14:38:29,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615571987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638517691] [2021-06-05 14:38:29,345 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:29,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:38:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:38:29,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638517691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:29,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:29,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 14:38:29,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354235177] [2021-06-05 14:38:29,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:38:29,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:38:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:38:29,608 INFO L87 Difference]: Start difference. First operand 311 states and 923 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:29,844 INFO L93 Difference]: Finished difference Result 694 states and 1967 transitions. [2021-06-05 14:38:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:38:29,844 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 22 [2021-06-05 14:38:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:29,845 INFO L225 Difference]: With dead ends: 694 [2021-06-05 14:38:29,845 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:38:29,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:38:29,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 302. [2021-06-05 14:38:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.956810631229236) internal successors, (890), 301 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 890 transitions. [2021-06-05 14:38:29,849 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 890 transitions. Word has length 22 [2021-06-05 14:38:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:29,849 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 890 transitions. [2021-06-05 14:38:29,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 890 transitions. [2021-06-05 14:38:29,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:29,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:29,850 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:30,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:30,051 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:30,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1043150932, now seen corresponding path program 46 times [2021-06-05 14:38:30,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:30,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908252024] [2021-06-05 14:38:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908252024] [2021-06-05 14:38:30,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908252024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972920778] [2021-06-05 14:38:30,129 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:30,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:30,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:30,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:30,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972920778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:30,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 14:38:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966776593] [2021-06-05 14:38:30,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:30,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:30,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:30,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:30,423 INFO L87 Difference]: Start difference. First operand 302 states and 890 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:31,198 INFO L93 Difference]: Finished difference Result 620 states and 1775 transitions. [2021-06-05 14:38:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:31,199 INFO L225 Difference]: With dead ends: 620 [2021-06-05 14:38:31,199 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 14:38:31,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 827.9ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:38:31,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 14:38:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 269. [2021-06-05 14:38:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.966417910447761) internal successors, (795), 268 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 795 transitions. [2021-06-05 14:38:31,203 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 795 transitions. Word has length 22 [2021-06-05 14:38:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:31,203 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 795 transitions. [2021-06-05 14:38:31,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 795 transitions. [2021-06-05 14:38:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:31,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:31,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:31,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:31,404 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:31,405 INFO L82 PathProgramCache]: Analyzing trace with hash 942011964, now seen corresponding path program 47 times [2021-06-05 14:38:31,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:31,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620089230] [2021-06-05 14:38:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:38:31,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:31,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620089230] [2021-06-05 14:38:31,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620089230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:31,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289338728] [2021-06-05 14:38:31,478 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:31,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:38:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:31,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:31,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289338728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:31,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:31,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 14:38:31,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917123735] [2021-06-05 14:38:31,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:31,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:31,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:31,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:31,783 INFO L87 Difference]: Start difference. First operand 269 states and 795 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:33,158 INFO L93 Difference]: Finished difference Result 887 states and 2504 transitions. [2021-06-05 14:38:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:38:33,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:33,160 INFO L225 Difference]: With dead ends: 887 [2021-06-05 14:38:33,160 INFO L226 Difference]: Without dead ends: 635 [2021-06-05 14:38:33,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1362.2ms TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:38:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-05 14:38:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 269. [2021-06-05 14:38:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.9365671641791047) internal successors, (787), 268 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 787 transitions. [2021-06-05 14:38:33,164 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 787 transitions. Word has length 22 [2021-06-05 14:38:33,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:33,164 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 787 transitions. [2021-06-05 14:38:33,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 787 transitions. [2021-06-05 14:38:33,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:33,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:33,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:33,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:33,365 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash 746481008, now seen corresponding path program 48 times [2021-06-05 14:38:33,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:33,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472049952] [2021-06-05 14:38:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:33,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:33,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472049952] [2021-06-05 14:38:33,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472049952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:33,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956242141] [2021-06-05 14:38:33,514 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:33,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:33,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:33,713 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 3 treesize of output 1 [2021-06-05 14:38:33,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:33,720 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 8 treesize of output 1 [2021-06-05 14:38:33,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:33,875 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 14:38:33,875 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 14:38:33,878 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 3 treesize of output 1 [2021-06-05 14:38:33,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:33,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:33,944 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 4 treesize of output 2 [2021-06-05 14:38:33,945 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:33,947 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 4 treesize of output 2 [2021-06-05 14:38:33,948 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:34,017 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 4 treesize of output 2 [2021-06-05 14:38:34,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,022 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 4 treesize of output 2 [2021-06-05 14:38:34,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:34,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:38:34,090 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:38:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:34,357 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 9 treesize of output 2 [2021-06-05 14:38:34,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:34,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,397 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-06-05 14:38:34,400 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 3 treesize of output 1 [2021-06-05 14:38:34,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:34,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:34,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:34,416 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 14:38:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:34,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956242141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:34,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:34,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:38:34,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127849768] [2021-06-05 14:38:34,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:34,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:34,471 INFO L87 Difference]: Start difference. First operand 269 states and 787 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:35,186 INFO L93 Difference]: Finished difference Result 639 states and 1819 transitions. [2021-06-05 14:38:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 22 [2021-06-05 14:38:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:35,187 INFO L225 Difference]: With dead ends: 639 [2021-06-05 14:38:35,187 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 14:38:35,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 842.4ms TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:38:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 14:38:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-05 14:38:35,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.98961937716263) internal successors, (864), 289 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 864 transitions. [2021-06-05 14:38:35,191 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 864 transitions. Word has length 22 [2021-06-05 14:38:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:35,191 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 864 transitions. [2021-06-05 14:38:35,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 864 transitions. [2021-06-05 14:38:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:35,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:35,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:35,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 14:38:35,392 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash -959731426, now seen corresponding path program 49 times [2021-06-05 14:38:35,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:35,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920266674] [2021-06-05 14:38:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:35,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:35,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920266674] [2021-06-05 14:38:35,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920266674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:35,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944666409] [2021-06-05 14:38:35,542 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:35,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:35,764 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 8 treesize of output 1 [2021-06-05 14:38:35,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:35,768 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 3 treesize of output 1 [2021-06-05 14:38:35,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:35,921 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 14:38:35,922 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 14:38:35,925 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 4 treesize of output 2 [2021-06-05 14:38:35,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:35,929 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 4 treesize of output 2 [2021-06-05 14:38:35,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:35,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:35,993 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 4 treesize of output 2 [2021-06-05 14:38:35,994 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:35,997 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 4 treesize of output 2 [2021-06-05 14:38:35,998 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,057 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 3 treesize of output 1 [2021-06-05 14:38:36,058 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:38:36,115 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:38:36,359 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 4 treesize of output 2 [2021-06-05 14:38:36,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:36,365 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 9 treesize of output 2 [2021-06-05 14:38:36,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,445 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-05 14:38:36,448 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 3 treesize of output 1 [2021-06-05 14:38:36,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,481 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 3 treesize of output 1 [2021-06-05 14:38:36,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,513 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 4 treesize of output 2 [2021-06-05 14:38:36,514 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:36,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:36,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:36,543 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 14:38:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:36,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944666409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:36,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:36,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:38:36,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377994365] [2021-06-05 14:38:36,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:36,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:36,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:36,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:36,621 INFO L87 Difference]: Start difference. First operand 290 states and 864 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:38,612 INFO L93 Difference]: Finished difference Result 703 states and 1960 transitions. [2021-06-05 14:38:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:38:38,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 22 [2021-06-05 14:38:38,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:38,614 INFO L225 Difference]: With dead ends: 703 [2021-06-05 14:38:38,614 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 14:38:38,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1898.1ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:38:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 14:38:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 283. [2021-06-05 14:38:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9645390070921986) internal successors, (836), 282 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 836 transitions. [2021-06-05 14:38:38,619 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 836 transitions. Word has length 22 [2021-06-05 14:38:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:38,619 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 836 transitions. [2021-06-05 14:38:38,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 836 transitions. [2021-06-05 14:38:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:38,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:38,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:38,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 14:38:38,837 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash 205767280, now seen corresponding path program 50 times [2021-06-05 14:38:38,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:38,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371648187] [2021-06-05 14:38:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:39,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:39,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371648187] [2021-06-05 14:38:39,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371648187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:39,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46645290] [2021-06-05 14:38:39,039 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:39,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:39,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:39,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:39,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:39,278 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 4 treesize of output 2 [2021-06-05 14:38:39,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:39,283 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 9 treesize of output 2 [2021-06-05 14:38:39,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,420 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 14:38:39,421 INFO L628 ElimStorePlain]: treesize reduction 32, result has 79.7 percent of original size [2021-06-05 14:38:39,424 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 3 treesize of output 1 [2021-06-05 14:38:39,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:39,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:39,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 14:38:39,491 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:170, output treesize:120 [2021-06-05 14:38:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:39,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46645290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:39,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:39,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:38:39,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077663666] [2021-06-05 14:38:39,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:38:39,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:39,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:38:39,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:38:39,720 INFO L87 Difference]: Start difference. First operand 283 states and 836 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,297 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-06-05 14:38:40,423 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 14:38:40,664 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 14:38:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:40,940 INFO L93 Difference]: Finished difference Result 463 states and 1318 transitions. [2021-06-05 14:38:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:40,941 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:38:40,941 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 14:38:40,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1255.2ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 14:38:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-06-05 14:38:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.938181818181818) internal successors, (808), 275 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 808 transitions. [2021-06-05 14:38:40,944 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 808 transitions. Word has length 22 [2021-06-05 14:38:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:40,944 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 808 transitions. [2021-06-05 14:38:40,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 808 transitions. [2021-06-05 14:38:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:40,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:40,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:41,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-05 14:38:41,145 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -388078088, now seen corresponding path program 51 times [2021-06-05 14:38:41,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:41,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910195993] [2021-06-05 14:38:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:41,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910195993] [2021-06-05 14:38:41,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910195993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:41,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586561987] [2021-06-05 14:38:41,266 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:41,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:41,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:41,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:41,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:41,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,492 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 8 treesize of output 1 [2021-06-05 14:38:41,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:41,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,502 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 3 treesize of output 1 [2021-06-05 14:38:41,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,506 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 4 treesize of output 2 [2021-06-05 14:38:41,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,510 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 4 treesize of output 2 [2021-06-05 14:38:41,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:41,515 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:38:41,520 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:41,523 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,597 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-05 14:38:41,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:38:41,599 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-05 14:38:41,800 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 4 treesize of output 2 [2021-06-05 14:38:41,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:41,805 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 9 treesize of output 2 [2021-06-05 14:38:41,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,844 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-05 14:38:41,846 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 3 treesize of output 1 [2021-06-05 14:38:41,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:41,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:41,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:38:41,860 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 14:38:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:41,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586561987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:41,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:41,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:38:41,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380157939] [2021-06-05 14:38:41,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:41,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:41,904 INFO L87 Difference]: Start difference. First operand 276 states and 808 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:42,534 INFO L93 Difference]: Finished difference Result 730 states and 2080 transitions. [2021-06-05 14:38:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 22 [2021-06-05 14:38:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:42,536 INFO L225 Difference]: With dead ends: 730 [2021-06-05 14:38:42,536 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:38:42,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:38:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 304. [2021-06-05 14:38:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.036303630363036) internal successors, (920), 303 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-06-05 14:38:42,542 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 22 [2021-06-05 14:38:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:42,542 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-06-05 14:38:42,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-06-05 14:38:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:42,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:42,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:42,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-05 14:38:42,743 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:42,744 INFO L82 PathProgramCache]: Analyzing trace with hash -2094290522, now seen corresponding path program 52 times [2021-06-05 14:38:42,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:42,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680034484] [2021-06-05 14:38:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:42,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:42,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680034484] [2021-06-05 14:38:42,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680034484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:42,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961020413] [2021-06-05 14:38:42,863 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:42,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:42,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:42,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:42,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:43,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:38:43,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,046 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 3 treesize of output 1 [2021-06-05 14:38:43,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,051 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 4 treesize of output 2 [2021-06-05 14:38:43,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,054 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 9 treesize of output 2 [2021-06-05 14:38:43,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,119 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-05 14:38:43,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:38:43,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:132, output treesize:66 [2021-06-05 14:38:43,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:38:43,288 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 9 treesize of output 2 [2021-06-05 14:38:43,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:38:43,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,356 INFO L628 ElimStorePlain]: treesize reduction 43, result has 56.1 percent of original size [2021-06-05 14:38:43,359 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 4 treesize of output 2 [2021-06-05 14:38:43,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:43,386 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 3 treesize of output 1 [2021-06-05 14:38:43,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:38:43,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:38:43,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:38:43,410 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-06-05 14:38:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:43,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961020413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:43,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:43,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:38:43,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822702204] [2021-06-05 14:38:43,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:38:43,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:43,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:38:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:38:43,481 INFO L87 Difference]: Start difference. First operand 304 states and 920 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:44,899 INFO L93 Difference]: Finished difference Result 858 states and 2428 transitions. [2021-06-05 14:38:44,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:38:44,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 22 [2021-06-05 14:38:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:44,900 INFO L225 Difference]: With dead ends: 858 [2021-06-05 14:38:44,900 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 14:38:44,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1364.3ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:38:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 14:38:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 317. [2021-06-05 14:38:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-06-05 14:38:44,904 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 22 [2021-06-05 14:38:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:44,905 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-06-05 14:38:44,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-06-05 14:38:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:44,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:44,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:45,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-05 14:38:45,106 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash 129512560, now seen corresponding path program 53 times [2021-06-05 14:38:45,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:45,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268659734] [2021-06-05 14:38:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:45,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:45,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268659734] [2021-06-05 14:38:45,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268659734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:45,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641766262] [2021-06-05 14:38:45,241 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:45,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:45,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:45,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641766262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:45,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:45,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 14:38:45,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656543556] [2021-06-05 14:38:45,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:38:45,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:45,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:38:45,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:45,434 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:46,052 INFO L93 Difference]: Finished difference Result 594 states and 1685 transitions. [2021-06-05 14:38:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:46,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:46,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:46,053 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:38:46,053 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:38:46,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 679.3ms TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:38:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:38:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 304. [2021-06-05 14:38:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 14:38:46,056 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 14:38:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:46,056 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 14:38:46,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 14:38:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:46,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:46,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:46,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 14:38:46,257 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:46,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:46,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1694127950, now seen corresponding path program 54 times [2021-06-05 14:38:46,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:46,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622436585] [2021-06-05 14:38:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:46,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622436585] [2021-06-05 14:38:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622436585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094741580] [2021-06-05 14:38:46,325 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:46,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:46,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:46,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:46,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094741580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:46,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:46,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:38:46,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16002900] [2021-06-05 14:38:46,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:38:46,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:38:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:38:46,501 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:46,768 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2021-06-05 14:38:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:46,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:46,769 INFO L225 Difference]: With dead ends: 485 [2021-06-05 14:38:46,769 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 14:38:46,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 14:38:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2021-06-05 14:38:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 14:38:46,773 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 14:38:46,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:46,773 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 14:38:46,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 14:38:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:46,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:46,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:46,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:46,975 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:46,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:46,975 INFO L82 PathProgramCache]: Analyzing trace with hash -541317644, now seen corresponding path program 55 times [2021-06-05 14:38:46,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:46,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522290250] [2021-06-05 14:38:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:47,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522290250] [2021-06-05 14:38:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522290250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219029671] [2021-06-05 14:38:47,052 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219029671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:47,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:47,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137065583] [2021-06-05 14:38:47,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:47,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:47,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:47,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:47,225 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:47,528 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2021-06-05 14:38:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:38:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:47,529 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:38:47,529 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:38:47,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:47,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:38:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2021-06-05 14:38:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-06-05 14:38:47,533 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2021-06-05 14:38:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:47,533 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-06-05 14:38:47,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:47,533 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-06-05 14:38:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:47,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:47,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:47,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,750 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:47,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:47,750 INFO L82 PathProgramCache]: Analyzing trace with hash 953285320, now seen corresponding path program 56 times [2021-06-05 14:38:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:47,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312307683] [2021-06-05 14:38:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:47,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:47,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312307683] [2021-06-05 14:38:47,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312307683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:47,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883336536] [2021-06-05 14:38:47,819 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:47,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883336536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:48,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:48,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417392860] [2021-06-05 14:38:48,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:48,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:48,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:48,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:48,007 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:48,266 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2021-06-05 14:38:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:48,266 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:48,267 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:38:48,267 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:38:48,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:38:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2021-06-05 14:38:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2021-06-05 14:38:48,271 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2021-06-05 14:38:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:48,271 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2021-06-05 14:38:48,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2021-06-05 14:38:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:48,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:48,272 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:48,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:48,472 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:48,473 INFO L82 PathProgramCache]: Analyzing trace with hash 634173000, now seen corresponding path program 57 times [2021-06-05 14:38:48,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:48,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272049568] [2021-06-05 14:38:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:48,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272049568] [2021-06-05 14:38:48,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272049568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471992217] [2021-06-05 14:38:48,598 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:48,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:48,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471992217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:48,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:48,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996480271] [2021-06-05 14:38:48,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:48,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:48,753 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:48,964 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2021-06-05 14:38:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:38:48,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:48,965 INFO L225 Difference]: With dead ends: 506 [2021-06-05 14:38:48,966 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:38:48,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:38:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2021-06-05 14:38:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 14:38:48,970 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 14:38:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:48,970 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 14:38:48,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 14:38:48,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:48,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:48,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:49,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 14:38:49,171 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:49,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1424442098, now seen corresponding path program 58 times [2021-06-05 14:38:49,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:49,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566563199] [2021-06-05 14:38:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:49,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:49,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566563199] [2021-06-05 14:38:49,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566563199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:49,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895724018] [2021-06-05 14:38:49,236 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:49,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:49,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895724018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:49,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:49,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:49,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211589949] [2021-06-05 14:38:49,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:49,414 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:49,702 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2021-06-05 14:38:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:38:49,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:49,703 INFO L225 Difference]: With dead ends: 458 [2021-06-05 14:38:49,703 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 14:38:49,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:38:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 14:38:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2021-06-05 14:38:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2021-06-05 14:38:49,707 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2021-06-05 14:38:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:49,707 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2021-06-05 14:38:49,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2021-06-05 14:38:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:49,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:49,708 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:49,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:49,908 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash 70160866, now seen corresponding path program 59 times [2021-06-05 14:38:49,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:49,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735639761] [2021-06-05 14:38:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:49,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735639761] [2021-06-05 14:38:49,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735639761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:49,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753636019] [2021-06-05 14:38:49,978 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:50,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:50,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:50,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:50,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753636019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:50,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:50,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:50,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671587679] [2021-06-05 14:38:50,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:50,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:50,153 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:50,347 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-06-05 14:38:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:50,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:50,355 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:38:50,355 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:38:50,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:38:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2021-06-05 14:38:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2021-06-05 14:38:50,359 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2021-06-05 14:38:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:50,359 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2021-06-05 14:38:50,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2021-06-05 14:38:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:50,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:50,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:50,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable879 [2021-06-05 14:38:50,560 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash 495108076, now seen corresponding path program 60 times [2021-06-05 14:38:50,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:50,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680643242] [2021-06-05 14:38:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:50,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:50,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680643242] [2021-06-05 14:38:50,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680643242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:50,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662863893] [2021-06-05 14:38:50,624 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:50,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:50,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:50,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:50,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:50,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662863893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:50,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:50,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:50,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154556125] [2021-06-05 14:38:50,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:50,819 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:50,976 INFO L93 Difference]: Finished difference Result 364 states and 1056 transitions. [2021-06-05 14:38:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:38:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:50,977 INFO L225 Difference]: With dead ends: 364 [2021-06-05 14:38:50,977 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 14:38:50,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:38:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 14:38:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-06-05 14:38:50,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2021-06-05 14:38:50,981 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2021-06-05 14:38:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:50,981 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2021-06-05 14:38:50,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2021-06-05 14:38:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:50,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:50,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:51,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:51,203 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:51,203 INFO L82 PathProgramCache]: Analyzing trace with hash 656029498, now seen corresponding path program 61 times [2021-06-05 14:38:51,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:51,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297559163] [2021-06-05 14:38:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:51,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:51,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297559163] [2021-06-05 14:38:51,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297559163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553749270] [2021-06-05 14:38:51,280 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:51,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553749270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:51,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:51,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680903482] [2021-06-05 14:38:51,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:51,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:51,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:51,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:51,451 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:51,701 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2021-06-05 14:38:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:38:51,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:51,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:51,702 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:38:51,702 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:38:51,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:38:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2021-06-05 14:38:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2021-06-05 14:38:51,706 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2021-06-05 14:38:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:51,706 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2021-06-05 14:38:51,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2021-06-05 14:38:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:51,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:51,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:51,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 14:38:51,907 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:51,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:51,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2144334834, now seen corresponding path program 62 times [2021-06-05 14:38:51,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:51,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884431542] [2021-06-05 14:38:51,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:51,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:51,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884431542] [2021-06-05 14:38:51,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884431542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:51,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217099774] [2021-06-05 14:38:51,976 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:52,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:52,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:52,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:52,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217099774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:52,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:52,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:52,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500897562] [2021-06-05 14:38:52,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:52,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:52,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:52,137 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:52,314 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2021-06-05 14:38:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:52,315 INFO L225 Difference]: With dead ends: 473 [2021-06-05 14:38:52,315 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:38:52,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:38:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-06-05 14:38:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2021-06-05 14:38:52,319 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2021-06-05 14:38:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:52,319 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2021-06-05 14:38:52,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2021-06-05 14:38:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:52,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:52,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:52,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:52,520 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1831520142, now seen corresponding path program 63 times [2021-06-05 14:38:52,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:52,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876715961] [2021-06-05 14:38:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:52,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:52,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876715961] [2021-06-05 14:38:52,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876715961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:52,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919601117] [2021-06-05 14:38:52,592 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 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 [2021-06-05 14:38:52,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:52,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:52,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:52,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919601117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:52,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:52,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:52,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319881620] [2021-06-05 14:38:52,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:52,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:52,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:52,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:52,809 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:53,005 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2021-06-05 14:38:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:53,006 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:38:53,006 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:38:53,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:38:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2021-06-05 14:38:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 14:38:53,010 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 14:38:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:53,010 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 14:38:53,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 14:38:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:53,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:53,010 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:53,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,211 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash -640453132, now seen corresponding path program 64 times [2021-06-05 14:38:53,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:53,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207055206] [2021-06-05 14:38:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207055206] [2021-06-05 14:38:53,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207055206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325781903] [2021-06-05 14:38:53,282 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:53,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:53,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:53,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325781903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:53,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:53,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:53,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806695601] [2021-06-05 14:38:53,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:53,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:53,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:53,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:53,479 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:53,725 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-06-05 14:38:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:53,727 INFO L225 Difference]: With dead ends: 563 [2021-06-05 14:38:53,727 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:38:53,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:38:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2021-06-05 14:38:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2021-06-05 14:38:53,733 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2021-06-05 14:38:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:53,733 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2021-06-05 14:38:53,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2021-06-05 14:38:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:53,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:53,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:53,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-05 14:38:53,948 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash 854149832, now seen corresponding path program 65 times [2021-06-05 14:38:53,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:53,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015686476] [2021-06-05 14:38:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:54,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:54,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015686476] [2021-06-05 14:38:54,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015686476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:54,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225676317] [2021-06-05 14:38:54,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:54,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:54,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:54,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:54,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225676317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:54,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:54,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:54,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511781436] [2021-06-05 14:38:54,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:54,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:54,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:54,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:54,207 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:54,763 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2021-06-05 14:38:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:38:54,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:54,764 INFO L225 Difference]: With dead ends: 595 [2021-06-05 14:38:54,764 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:38:54,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:38:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:38:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2021-06-05 14:38:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2021-06-05 14:38:54,769 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2021-06-05 14:38:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:54,769 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2021-06-05 14:38:54,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2021-06-05 14:38:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:54,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:54,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:54,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-06-05 14:38:54,970 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:54,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1279097042, now seen corresponding path program 66 times [2021-06-05 14:38:54,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:54,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263992918] [2021-06-05 14:38:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263992918] [2021-06-05 14:38:55,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263992918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018280853] [2021-06-05 14:38:55,023 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 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 [2021-06-05 14:38:55,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:38:55,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:55,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018280853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:55,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:55,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673277706] [2021-06-05 14:38:55,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:55,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:55,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:55,208 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:55,523 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2021-06-05 14:38:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:38:55,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:55,524 INFO L225 Difference]: With dead ends: 572 [2021-06-05 14:38:55,524 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 14:38:55,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:38:55,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 14:38:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2021-06-05 14:38:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2021-06-05 14:38:55,530 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2021-06-05 14:38:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:55,530 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2021-06-05 14:38:55,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2021-06-05 14:38:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:55,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:55,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:55,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:55,741 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:55,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1244273694, now seen corresponding path program 67 times [2021-06-05 14:38:55,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:55,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527686658] [2021-06-05 14:38:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:55,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527686658] [2021-06-05 14:38:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527686658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:55,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103087583] [2021-06-05 14:38:55,796 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:55,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:55,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103087583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:56,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:56,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819570742] [2021-06-05 14:38:56,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:56,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:56,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:56,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:56,001 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:56,286 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2021-06-05 14:38:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:56,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:56,287 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:38:56,287 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 14:38:56,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 14:38:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2021-06-05 14:38:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-05 14:38:56,292 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-05 14:38:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:56,292 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-05 14:38:56,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-05 14:38:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:56,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:56,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:56,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:56,493 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:56,493 INFO L82 PathProgramCache]: Analyzing trace with hash 697114082, now seen corresponding path program 68 times [2021-06-05 14:38:56,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:56,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616238985] [2021-06-05 14:38:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:56,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616238985] [2021-06-05 14:38:56,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616238985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846697910] [2021-06-05 14:38:56,559 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:56,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:56,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:56,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846697910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:56,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:56,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:56,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324568179] [2021-06-05 14:38:56,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:56,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:56,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:56,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:56,742 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:56,898 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-06-05 14:38:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:56,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:56,899 INFO L225 Difference]: With dead ends: 461 [2021-06-05 14:38:56,899 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 14:38:56,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 14:38:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 334. [2021-06-05 14:38:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.966966966966967) internal successors, (988), 333 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 988 transitions. [2021-06-05 14:38:56,904 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 988 transitions. Word has length 22 [2021-06-05 14:38:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:56,904 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 988 transitions. [2021-06-05 14:38:56,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 988 transitions. [2021-06-05 14:38:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:56,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:56,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:57,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:57,109 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2103250250, now seen corresponding path program 69 times [2021-06-05 14:38:57,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:57,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77602699] [2021-06-05 14:38:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:57,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:57,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77602699] [2021-06-05 14:38:57,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77602699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:57,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590301523] [2021-06-05 14:38:57,175 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:57,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:38:57,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:57,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:57,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:57,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590301523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:57,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:57,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:57,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985630133] [2021-06-05 14:38:57,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:57,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:57,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:57,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:57,353 INFO L87 Difference]: Start difference. First operand 334 states and 988 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:57,615 INFO L93 Difference]: Finished difference Result 492 states and 1422 transitions. [2021-06-05 14:38:57,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:57,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:57,616 INFO L225 Difference]: With dead ends: 492 [2021-06-05 14:38:57,616 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 14:38:57,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:38:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 14:38:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2021-06-05 14:38:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9575757575757575) internal successors, (976), 330 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 976 transitions. [2021-06-05 14:38:57,621 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 976 transitions. Word has length 22 [2021-06-05 14:38:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:57,621 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 976 transitions. [2021-06-05 14:38:57,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 976 transitions. [2021-06-05 14:38:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:57,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:57,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:57,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable928 [2021-06-05 14:38:57,822 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:57,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1678303040, now seen corresponding path program 70 times [2021-06-05 14:38:57,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:57,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455510085] [2021-06-05 14:38:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:57,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:57,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455510085] [2021-06-05 14:38:57,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455510085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:57,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40412326] [2021-06-05 14:38:57,881 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:57,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:38:57,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:57,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:57,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40412326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:58,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:58,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157727865] [2021-06-05 14:38:58,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:58,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:58,054 INFO L87 Difference]: Start difference. First operand 331 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:58,256 INFO L93 Difference]: Finished difference Result 446 states and 1303 transitions. [2021-06-05 14:38:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:58,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:58,257 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:38:58,257 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 14:38:58,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:38:58,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 14:38:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2021-06-05 14:38:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-05 14:38:58,261 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-05 14:38:58,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:58,261 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-05 14:38:58,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-05 14:38:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:58,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:58,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:58,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:58,481 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1517381618, now seen corresponding path program 71 times [2021-06-05 14:38:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:58,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696536546] [2021-06-05 14:38:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:58,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696536546] [2021-06-05 14:38:58,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696536546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246687185] [2021-06-05 14:38:58,553 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:58,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:38:58,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:58,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246687185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:58,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:58,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035106633] [2021-06-05 14:38:58,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:58,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:58,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:58,739 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:59,059 INFO L93 Difference]: Finished difference Result 502 states and 1458 transitions. [2021-06-05 14:38:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:38:59,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:59,060 INFO L225 Difference]: With dead ends: 502 [2021-06-05 14:38:59,060 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:38:59,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:38:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:38:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 340. [2021-06-05 14:38:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-05 14:38:59,065 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-05 14:38:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:59,065 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-05 14:38:59,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-05 14:38:59,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:59,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:59,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:59,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,266 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:59,266 INFO L82 PathProgramCache]: Analyzing trace with hash -22778654, now seen corresponding path program 72 times [2021-06-05 14:38:59,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:59,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159801516] [2021-06-05 14:38:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:59,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159801516] [2021-06-05 14:38:59,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159801516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015998392] [2021-06-05 14:38:59,330 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:38:59,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:38:59,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:38:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015998392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:38:59,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:38:59,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145007634] [2021-06-05 14:38:59,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:38:59,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:38:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:38:59,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:38:59,497 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:38:59,663 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-06-05 14:38:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:38:59,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:38:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:38:59,664 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:38:59,664 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:38:59,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:38:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:38:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 347. [2021-06-05 14:38:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-05 14:38:59,668 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-05 14:38:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:38:59,668 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-05 14:38:59,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:38:59,668 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-05 14:38:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:38:59,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:38:59,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:38:59,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,869 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:38:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:38:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash -341890974, now seen corresponding path program 73 times [2021-06-05 14:38:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:38:59,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264456604] [2021-06-05 14:38:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:38:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:38:59,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:38:59,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264456604] [2021-06-05 14:38:59,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264456604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:38:59,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489533596] [2021-06-05 14:38:59,935 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:38:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:38:59,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:38:59,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489533596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:00,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:00,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:00,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567240394] [2021-06-05 14:39:00,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:00,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:00,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:00,096 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:00,292 INFO L93 Difference]: Finished difference Result 414 states and 1222 transitions. [2021-06-05 14:39:00,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:00,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:00,293 INFO L225 Difference]: With dead ends: 414 [2021-06-05 14:39:00,293 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:39:00,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:39:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 319. [2021-06-05 14:39:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-05 14:39:00,297 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-05 14:39:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:00,297 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-05 14:39:00,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-05 14:39:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:00,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:00,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:00,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:00,498 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1055430800, now seen corresponding path program 74 times [2021-06-05 14:39:00,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:00,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937409468] [2021-06-05 14:39:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:00,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:00,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937409468] [2021-06-05 14:39:00,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937409468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:00,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365389748] [2021-06-05 14:39:00,585 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:00,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:00,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:00,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:00,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365389748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:00,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:00,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:00,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944210168] [2021-06-05 14:39:00,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:00,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:00,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:00,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:00,735 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:01,047 INFO L93 Difference]: Finished difference Result 554 states and 1630 transitions. [2021-06-05 14:39:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:01,049 INFO L225 Difference]: With dead ends: 554 [2021-06-05 14:39:01,049 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 14:39:01,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 14:39:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 326. [2021-06-05 14:39:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 14:39:01,053 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 14:39:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:01,053 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 14:39:01,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 14:39:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:01,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:01,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:01,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:01,254 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1004090902, now seen corresponding path program 75 times [2021-06-05 14:39:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:01,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278581504] [2021-06-05 14:39:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:01,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:01,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278581504] [2021-06-05 14:39:01,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278581504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:01,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738196453] [2021-06-05 14:39:01,336 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:01,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:01,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:01,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:01,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738196453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:01,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:01,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:01,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038159045] [2021-06-05 14:39:01,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:01,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:01,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:01,525 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:01,914 INFO L93 Difference]: Finished difference Result 651 states and 1893 transitions. [2021-06-05 14:39:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:01,915 INFO L225 Difference]: With dead ends: 651 [2021-06-05 14:39:01,915 INFO L226 Difference]: Without dead ends: 651 [2021-06-05 14:39:01,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-05 14:39:01,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 338. [2021-06-05 14:39:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-05 14:39:01,921 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-05 14:39:01,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:01,921 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-05 14:39:01,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-05 14:39:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:01,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:01,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:02,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:02,122 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:02,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1796273430, now seen corresponding path program 76 times [2021-06-05 14:39:02,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:02,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996374827] [2021-06-05 14:39:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:02,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996374827] [2021-06-05 14:39:02,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996374827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779366529] [2021-06-05 14:39:02,185 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:02,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779366529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:02,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:02,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065717493] [2021-06-05 14:39:02,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:02,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:02,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:02,348 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:02,677 INFO L93 Difference]: Finished difference Result 642 states and 1864 transitions. [2021-06-05 14:39:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:02,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:02,679 INFO L225 Difference]: With dead ends: 642 [2021-06-05 14:39:02,679 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 14:39:02,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 14:39:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 345. [2021-06-05 14:39:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-05 14:39:02,684 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-05 14:39:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:02,684 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-05 14:39:02,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-05 14:39:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:02,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:02,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:02,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 14:39:02,885 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2115385750, now seen corresponding path program 77 times [2021-06-05 14:39:02,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:02,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408477165] [2021-06-05 14:39:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:02,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408477165] [2021-06-05 14:39:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408477165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589864035] [2021-06-05 14:39:02,953 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:03,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:03,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:03,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:03,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589864035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:03,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:03,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:03,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247670505] [2021-06-05 14:39:03,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:03,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:03,119 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:03,435 INFO L93 Difference]: Finished difference Result 560 states and 1648 transitions. [2021-06-05 14:39:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:03,436 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:39:03,436 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 14:39:03,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:03,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 14:39:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 323. [2021-06-05 14:39:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9472049689440993) internal successors, (949), 322 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 949 transitions. [2021-06-05 14:39:03,441 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 949 transitions. Word has length 22 [2021-06-05 14:39:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:03,441 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 949 transitions. [2021-06-05 14:39:03,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 949 transitions. [2021-06-05 14:39:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:03,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:03,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:03,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:03,655 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash 120966448, now seen corresponding path program 78 times [2021-06-05 14:39:03,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:03,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328197261] [2021-06-05 14:39:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:03,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:03,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328197261] [2021-06-05 14:39:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328197261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:03,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840164550] [2021-06-05 14:39:03,725 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:03,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:03,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:03,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:03,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840164550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:03,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:03,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:03,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459195952] [2021-06-05 14:39:03,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:03,899 INFO L87 Difference]: Start difference. First operand 323 states and 949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:04,196 INFO L93 Difference]: Finished difference Result 503 states and 1467 transitions. [2021-06-05 14:39:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:04,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:04,197 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:39:04,197 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 14:39:04,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 14:39:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 332. [2021-06-05 14:39:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9667673716012084) internal successors, (982), 331 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 982 transitions. [2021-06-05 14:39:04,202 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 982 transitions. Word has length 22 [2021-06-05 14:39:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:04,202 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 982 transitions. [2021-06-05 14:39:04,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 982 transitions. [2021-06-05 14:39:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:04,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:04,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:04,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:04,403 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:04,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1615569412, now seen corresponding path program 79 times [2021-06-05 14:39:04,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:04,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693987187] [2021-06-05 14:39:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:04,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693987187] [2021-06-05 14:39:04,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693987187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021995085] [2021-06-05 14:39:04,473 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:04,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:04,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:04,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021995085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:04,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:04,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:04,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567791015] [2021-06-05 14:39:04,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:04,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:04,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:04,677 INFO L87 Difference]: Start difference. First operand 332 states and 982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:05,038 INFO L93 Difference]: Finished difference Result 523 states and 1513 transitions. [2021-06-05 14:39:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:05,038 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:05,039 INFO L225 Difference]: With dead ends: 523 [2021-06-05 14:39:05,039 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:39:05,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:39:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 329. [2021-06-05 14:39:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.957317073170732) internal successors, (970), 328 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 970 transitions. [2021-06-05 14:39:05,043 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 970 transitions. Word has length 22 [2021-06-05 14:39:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:05,043 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 970 transitions. [2021-06-05 14:39:05,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,043 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 970 transitions. [2021-06-05 14:39:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:05,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:05,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:05,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 14:39:05,259 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:05,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2040516622, now seen corresponding path program 80 times [2021-06-05 14:39:05,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:05,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139529709] [2021-06-05 14:39:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:05,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:05,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139529709] [2021-06-05 14:39:05,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139529709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:05,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694952730] [2021-06-05 14:39:05,319 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:05,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:05,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:05,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694952730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:05,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:05,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:05,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255968744] [2021-06-05 14:39:05,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:05,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:05,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:05,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:05,489 INFO L87 Difference]: Start difference. First operand 329 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:05,700 INFO L93 Difference]: Finished difference Result 412 states and 1199 transitions. [2021-06-05 14:39:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:05,701 INFO L225 Difference]: With dead ends: 412 [2021-06-05 14:39:05,701 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 14:39:05,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:05,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 14:39:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2021-06-05 14:39:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 14:39:05,705 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 14:39:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:05,705 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 14:39:05,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 14:39:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:05,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:05,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:05,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:05,906 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:05,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2093529252, now seen corresponding path program 81 times [2021-06-05 14:39:05,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:05,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034374736] [2021-06-05 14:39:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:05,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:05,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034374736] [2021-06-05 14:39:05,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034374736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:05,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480632631] [2021-06-05 14:39:05,973 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:06,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:06,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:06,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:06,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480632631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:06,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:06,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021625553] [2021-06-05 14:39:06,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:06,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:06,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:06,140 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:06,439 INFO L93 Difference]: Finished difference Result 551 states and 1603 transitions. [2021-06-05 14:39:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:06,440 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:39:06,440 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 14:39:06,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 14:39:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 338. [2021-06-05 14:39:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-05 14:39:06,444 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-05 14:39:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:06,444 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-05 14:39:06,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-05 14:39:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:06,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:06,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:06,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-05 14:39:06,645 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash -598926288, now seen corresponding path program 82 times [2021-06-05 14:39:06,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:06,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630090744] [2021-06-05 14:39:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:06,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630090744] [2021-06-05 14:39:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630090744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646319128] [2021-06-05 14:39:06,713 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:06,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:06,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:06,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:06,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:06,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646319128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:06,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:06,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:06,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175530394] [2021-06-05 14:39:06,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:06,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:06,881 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:07,105 INFO L93 Difference]: Finished difference Result 530 states and 1538 transitions. [2021-06-05 14:39:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:07,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:07,106 INFO L225 Difference]: With dead ends: 530 [2021-06-05 14:39:07,106 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:39:07,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:39:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-06-05 14:39:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-05 14:39:07,110 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-05 14:39:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:07,110 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-05 14:39:07,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-05 14:39:07,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:07,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:07,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:07,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:07,312 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -918038608, now seen corresponding path program 83 times [2021-06-05 14:39:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:07,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484588070] [2021-06-05 14:39:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:07,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:07,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484588070] [2021-06-05 14:39:07,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484588070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:07,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719683018] [2021-06-05 14:39:07,381 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:07,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:07,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:07,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:07,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719683018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:07,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:07,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:07,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395325025] [2021-06-05 14:39:07,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:07,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:07,546 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:07,797 INFO L93 Difference]: Finished difference Result 451 states and 1331 transitions. [2021-06-05 14:39:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:07,798 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:39:07,798 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:39:07,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:39:07,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 320. [2021-06-05 14:39:07,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2021-06-05 14:39:07,803 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2021-06-05 14:39:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:07,803 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2021-06-05 14:39:07,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:07,803 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2021-06-05 14:39:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:07,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:07,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:08,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 14:39:08,017 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash -132951768, now seen corresponding path program 84 times [2021-06-05 14:39:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:08,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701781810] [2021-06-05 14:39:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:08,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:08,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701781810] [2021-06-05 14:39:08,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701781810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:08,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203233179] [2021-06-05 14:39:08,087 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:08,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:08,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:08,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:08,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203233179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:08,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:08,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:08,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099143585] [2021-06-05 14:39:08,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:08,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:08,277 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:08,637 INFO L93 Difference]: Finished difference Result 736 states and 2158 transitions. [2021-06-05 14:39:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:08,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:08,639 INFO L225 Difference]: With dead ends: 736 [2021-06-05 14:39:08,639 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 14:39:08,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 14:39:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 328. [2021-06-05 14:39:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-05 14:39:08,645 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-05 14:39:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:08,645 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-05 14:39:08,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-05 14:39:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:08,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:08,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:08,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable997,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:08,849 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1926569934, now seen corresponding path program 85 times [2021-06-05 14:39:08,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:08,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242058329] [2021-06-05 14:39:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:08,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:08,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242058329] [2021-06-05 14:39:08,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242058329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:08,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952654124] [2021-06-05 14:39:08,928 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:08,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:08,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:09,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952654124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:09,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:09,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:09,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865855339] [2021-06-05 14:39:09,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:09,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:09,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:09,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:09,131 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:09,644 INFO L93 Difference]: Finished difference Result 755 states and 2196 transitions. [2021-06-05 14:39:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:09,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:09,645 INFO L225 Difference]: With dead ends: 755 [2021-06-05 14:39:09,645 INFO L226 Difference]: Without dead ends: 755 [2021-06-05 14:39:09,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-05 14:39:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 340. [2021-06-05 14:39:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9970501474926254) internal successors, (1016), 339 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1016 transitions. [2021-06-05 14:39:09,652 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1016 transitions. Word has length 22 [2021-06-05 14:39:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:09,652 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1016 transitions. [2021-06-05 14:39:09,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1016 transitions. [2021-06-05 14:39:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:09,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:09,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:09,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-05 14:39:09,861 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:09,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:09,861 INFO L82 PathProgramCache]: Analyzing trace with hash -873794398, now seen corresponding path program 86 times [2021-06-05 14:39:09,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:09,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085303923] [2021-06-05 14:39:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:09,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:09,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085303923] [2021-06-05 14:39:09,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085303923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:09,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008406775] [2021-06-05 14:39:09,926 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:09,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:09,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008406775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:10,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:10,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792652106] [2021-06-05 14:39:10,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:10,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:10,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:10,108 INFO L87 Difference]: Start difference. First operand 340 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:10,500 INFO L93 Difference]: Finished difference Result 758 states and 2203 transitions. [2021-06-05 14:39:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:10,501 INFO L225 Difference]: With dead ends: 758 [2021-06-05 14:39:10,501 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 14:39:10,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 14:39:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 347. [2021-06-05 14:39:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.976878612716763) internal successors, (1030), 346 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1030 transitions. [2021-06-05 14:39:10,506 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1030 transitions. Word has length 22 [2021-06-05 14:39:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:10,506 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1030 transitions. [2021-06-05 14:39:10,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1030 transitions. [2021-06-05 14:39:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:10,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:10,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:10,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:10,721 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1192906718, now seen corresponding path program 87 times [2021-06-05 14:39:10,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:10,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444606375] [2021-06-05 14:39:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:10,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444606375] [2021-06-05 14:39:10,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444606375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810948778] [2021-06-05 14:39:10,795 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:10,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:10,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810948778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:10,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:10,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:10,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289064968] [2021-06-05 14:39:10,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:10,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:10,991 INFO L87 Difference]: Start difference. First operand 347 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:11,360 INFO L93 Difference]: Finished difference Result 686 states and 2019 transitions. [2021-06-05 14:39:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:11,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:11,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:11,361 INFO L225 Difference]: With dead ends: 686 [2021-06-05 14:39:11,361 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 14:39:11,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 14:39:11,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 341. [2021-06-05 14:39:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.976470588235294) internal successors, (1012), 340 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1012 transitions. [2021-06-05 14:39:11,366 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1012 transitions. Word has length 22 [2021-06-05 14:39:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:11,366 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1012 transitions. [2021-06-05 14:39:11,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1012 transitions. [2021-06-05 14:39:11,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:11,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:11,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:11,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:11,567 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:11,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:11,567 INFO L82 PathProgramCache]: Analyzing trace with hash -241741712, now seen corresponding path program 88 times [2021-06-05 14:39:11,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:11,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112729787] [2021-06-05 14:39:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:11,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:11,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112729787] [2021-06-05 14:39:11,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112729787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:11,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082057247] [2021-06-05 14:39:11,633 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:11,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:11,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:11,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:11,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082057247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:11,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:11,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:39:11,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932624688] [2021-06-05 14:39:11,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:39:11,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:11,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:39:11,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:39:11,831 INFO L87 Difference]: Start difference. First operand 341 states and 1012 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:12,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:12,214 INFO L93 Difference]: Finished difference Result 621 states and 1823 transitions. [2021-06-05 14:39:12,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 22 [2021-06-05 14:39:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:12,215 INFO L225 Difference]: With dead ends: 621 [2021-06-05 14:39:12,215 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 14:39:12,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 14:39:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-06-05 14:39:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 14:39:12,221 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 14:39:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:12,221 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 14:39:12,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 14:39:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:12,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:12,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:12,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1026,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:12,437 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:12,437 INFO L82 PathProgramCache]: Analyzing trace with hash 968794932, now seen corresponding path program 89 times [2021-06-05 14:39:12,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:12,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486995922] [2021-06-05 14:39:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:12,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:12,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486995922] [2021-06-05 14:39:12,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486995922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:12,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365800246] [2021-06-05 14:39:12,509 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:12,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:12,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:12,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:12,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:12,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365800246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:12,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:12,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:12,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394604837] [2021-06-05 14:39:12,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:12,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:12,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:12,688 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:13,020 INFO L93 Difference]: Finished difference Result 633 states and 1841 transitions. [2021-06-05 14:39:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:13,021 INFO L225 Difference]: With dead ends: 633 [2021-06-05 14:39:13,021 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 14:39:13,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 14:39:13,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 336. [2021-06-05 14:39:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.985074626865672) internal successors, (1000), 335 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1000 transitions. [2021-06-05 14:39:13,026 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1000 transitions. Word has length 22 [2021-06-05 14:39:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:13,027 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1000 transitions. [2021-06-05 14:39:13,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1000 transitions. [2021-06-05 14:39:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:13,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:13,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:13,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:13,228 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1983309410, now seen corresponding path program 90 times [2021-06-05 14:39:13,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:13,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968955832] [2021-06-05 14:39:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:13,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:13,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968955832] [2021-06-05 14:39:13,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968955832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:13,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113855334] [2021-06-05 14:39:13,305 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:13,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:13,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:13,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:13,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:13,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113855334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:13,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:13,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:13,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861206678] [2021-06-05 14:39:13,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:13,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:13,513 INFO L87 Difference]: Start difference. First operand 336 states and 1000 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:13,901 INFO L93 Difference]: Finished difference Result 603 states and 1751 transitions. [2021-06-05 14:39:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:13,902 INFO L225 Difference]: With dead ends: 603 [2021-06-05 14:39:13,902 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:39:13,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:39:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 342. [2021-06-05 14:39:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-05 14:39:13,906 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-05 14:39:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:13,906 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-05 14:39:13,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:13,906 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-05 14:39:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:13,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:13,907 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:14,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-06-05 14:39:14,107 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:14,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:14,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1137989188, now seen corresponding path program 91 times [2021-06-05 14:39:14,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:14,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766404542] [2021-06-05 14:39:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:14,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766404542] [2021-06-05 14:39:14,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766404542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:14,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598536003] [2021-06-05 14:39:14,177 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:14,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:14,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:14,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598536003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:14,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:14,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:14,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413501400] [2021-06-05 14:39:14,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:14,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:14,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:14,358 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:14,685 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-06-05 14:39:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:14,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:14,686 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:39:14,686 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:39:14,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:39:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 324. [2021-06-05 14:39:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 14:39:14,690 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 14:39:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:14,691 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 14:39:14,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 14:39:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:14,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:14,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:14,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:14,892 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2141572440, now seen corresponding path program 92 times [2021-06-05 14:39:14,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:14,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939725409] [2021-06-05 14:39:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:14,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:14,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939725409] [2021-06-05 14:39:14,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939725409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:14,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280914501] [2021-06-05 14:39:14,963 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:15,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:15,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:15,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:15,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280914501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:15,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:15,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:15,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151833645] [2021-06-05 14:39:15,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:15,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:15,211 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:15,692 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2021-06-05 14:39:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:39:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:15,693 INFO L225 Difference]: With dead ends: 733 [2021-06-05 14:39:15,693 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 14:39:15,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:39:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 14:39:15,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 338. [2021-06-05 14:39:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-05 14:39:15,698 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-05 14:39:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:15,698 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-05 14:39:15,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-05 14:39:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:15,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:15,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:15,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-06-05 14:39:15,899 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:15,899 INFO L82 PathProgramCache]: Analyzing trace with hash -646969476, now seen corresponding path program 93 times [2021-06-05 14:39:15,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:15,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219430341] [2021-06-05 14:39:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:15,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:15,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219430341] [2021-06-05 14:39:15,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219430341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:15,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483662338] [2021-06-05 14:39:15,971 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:16,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:16,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483662338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:16,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:16,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:16,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309733224] [2021-06-05 14:39:16,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:16,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:16,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:16,191 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:16,623 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2021-06-05 14:39:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:16,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:16,624 INFO L225 Difference]: With dead ends: 767 [2021-06-05 14:39:16,624 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 14:39:16,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 14:39:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 345. [2021-06-05 14:39:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-05 14:39:16,629 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-05 14:39:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:16,629 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-05 14:39:16,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-05 14:39:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:16,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:16,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:16,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:16,830 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:16,830 INFO L82 PathProgramCache]: Analyzing trace with hash 803562480, now seen corresponding path program 94 times [2021-06-05 14:39:16,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:16,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612056733] [2021-06-05 14:39:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:16,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:16,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612056733] [2021-06-05 14:39:16,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612056733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:16,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697838663] [2021-06-05 14:39:16,906 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:16,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:16,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:16,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:16,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:17,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697838663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:17,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:17,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:17,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742286109] [2021-06-05 14:39:17,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:17,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:17,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:17,102 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:17,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:17,467 INFO L93 Difference]: Finished difference Result 745 states and 2169 transitions. [2021-06-05 14:39:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:17,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:17,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:17,468 INFO L225 Difference]: With dead ends: 745 [2021-06-05 14:39:17,468 INFO L226 Difference]: Without dead ends: 745 [2021-06-05 14:39:17,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-05 14:39:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 351. [2021-06-05 14:39:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0171428571428573) internal successors, (1056), 350 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1056 transitions. [2021-06-05 14:39:17,473 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1056 transitions. Word has length 22 [2021-06-05 14:39:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:17,473 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1056 transitions. [2021-06-05 14:39:17,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1056 transitions. [2021-06-05 14:39:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:17,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:17,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:17,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:17,674 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:17,675 INFO L82 PathProgramCache]: Analyzing trace with hash -708456964, now seen corresponding path program 95 times [2021-06-05 14:39:17,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:17,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669354438] [2021-06-05 14:39:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:17,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:17,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669354438] [2021-06-05 14:39:17,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669354438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:17,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250070824] [2021-06-05 14:39:17,759 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:17,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:17,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:17,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:17,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:18,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250070824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:18,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:18,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:18,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878115657] [2021-06-05 14:39:18,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:18,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:18,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:18,009 INFO L87 Difference]: Start difference. First operand 351 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:18,476 INFO L93 Difference]: Finished difference Result 754 states and 2175 transitions. [2021-06-05 14:39:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:18,478 INFO L225 Difference]: With dead ends: 754 [2021-06-05 14:39:18,478 INFO L226 Difference]: Without dead ends: 745 [2021-06-05 14:39:18,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-05 14:39:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 357. [2021-06-05 14:39:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.0) internal successors, (1068), 356 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1068 transitions. [2021-06-05 14:39:18,489 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1068 transitions. Word has length 22 [2021-06-05 14:39:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:18,489 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1068 transitions. [2021-06-05 14:39:18,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1068 transitions. [2021-06-05 14:39:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:18,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:18,490 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:18,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 14:39:18,705 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash -931017330, now seen corresponding path program 96 times [2021-06-05 14:39:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:18,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882099149] [2021-06-05 14:39:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:18,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882099149] [2021-06-05 14:39:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882099149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135145746] [2021-06-05 14:39:18,776 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:18,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:18,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135145746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:18,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:18,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:18,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348237814] [2021-06-05 14:39:18,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:18,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:18,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:18,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:18,970 INFO L87 Difference]: Start difference. First operand 357 states and 1068 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:19,399 INFO L93 Difference]: Finished difference Result 797 states and 2257 transitions. [2021-06-05 14:39:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:19,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:19,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:19,400 INFO L225 Difference]: With dead ends: 797 [2021-06-05 14:39:19,400 INFO L226 Difference]: Without dead ends: 787 [2021-06-05 14:39:19,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-05 14:39:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 369. [2021-06-05 14:39:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.005434782608696) internal successors, (1106), 368 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1106 transitions. [2021-06-05 14:39:19,406 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1106 transitions. Word has length 22 [2021-06-05 14:39:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:19,406 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1106 transitions. [2021-06-05 14:39:19,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1106 transitions. [2021-06-05 14:39:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:19,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:19,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:19,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-06-05 14:39:19,607 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:19,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1113107642, now seen corresponding path program 97 times [2021-06-05 14:39:19,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:19,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219833314] [2021-06-05 14:39:19,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:19,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219833314] [2021-06-05 14:39:19,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219833314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155783283] [2021-06-05 14:39:19,683 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:19,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155783283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:19,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:19,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:19,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409697057] [2021-06-05 14:39:19,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:19,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:19,893 INFO L87 Difference]: Start difference. First operand 369 states and 1106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:20,261 INFO L93 Difference]: Finished difference Result 711 states and 2049 transitions. [2021-06-05 14:39:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:20,262 INFO L225 Difference]: With dead ends: 711 [2021-06-05 14:39:20,262 INFO L226 Difference]: Without dead ends: 699 [2021-06-05 14:39:20,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-05 14:39:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 365. [2021-06-05 14:39:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0054945054945055) internal successors, (1094), 364 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1094 transitions. [2021-06-05 14:39:20,267 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1094 transitions. Word has length 22 [2021-06-05 14:39:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:20,267 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1094 transitions. [2021-06-05 14:39:20,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1094 transitions. [2021-06-05 14:39:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:20,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:20,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:20,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:20,468 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1304772384, now seen corresponding path program 98 times [2021-06-05 14:39:20,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:20,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925813349] [2021-06-05 14:39:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:20,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925813349] [2021-06-05 14:39:20,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925813349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146984801] [2021-06-05 14:39:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:20,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:20,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:20,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:20,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146984801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:20,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:20,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212739082] [2021-06-05 14:39:20,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:20,755 INFO L87 Difference]: Start difference. First operand 365 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:21,196 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2021-06-05 14:39:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:21,197 INFO L225 Difference]: With dead ends: 689 [2021-06-05 14:39:21,197 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 14:39:21,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 14:39:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 370. [2021-06-05 14:39:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.0) internal successors, (1107), 369 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1107 transitions. [2021-06-05 14:39:21,202 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1107 transitions. Word has length 22 [2021-06-05 14:39:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:21,202 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1107 transitions. [2021-06-05 14:39:21,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1107 transitions. [2021-06-05 14:39:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:21,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:21,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:21,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 14:39:21,403 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:21,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1495591948, now seen corresponding path program 99 times [2021-06-05 14:39:21,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:21,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78387918] [2021-06-05 14:39:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:21,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:21,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78387918] [2021-06-05 14:39:21,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78387918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:21,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178155988] [2021-06-05 14:39:21,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:21,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:21,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:21,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:21,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178155988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:21,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:21,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:21,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409436381] [2021-06-05 14:39:21,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:21,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:21,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:21,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:21,719 INFO L87 Difference]: Start difference. First operand 370 states and 1107 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:22,057 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2021-06-05 14:39:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:22,058 INFO L225 Difference]: With dead ends: 680 [2021-06-05 14:39:22,058 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 14:39:22,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 14:39:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 349. [2021-06-05 14:39:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-05 14:39:22,064 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-05 14:39:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:22,064 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-05 14:39:22,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-05 14:39:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:22,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:22,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:22,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:22,265 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:22,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2041925648, now seen corresponding path program 100 times [2021-06-05 14:39:22,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:22,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511981836] [2021-06-05 14:39:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:22,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:22,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511981836] [2021-06-05 14:39:22,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511981836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:22,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729896924] [2021-06-05 14:39:22,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:22,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:22,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:22,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:22,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:22,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729896924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:22,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:22,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353988303] [2021-06-05 14:39:22,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:22,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:22,582 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:22,912 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2021-06-05 14:39:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:22,913 INFO L225 Difference]: With dead ends: 594 [2021-06-05 14:39:22,913 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:39:22,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:39:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 346. [2021-06-05 14:39:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.971014492753623) internal successors, (1025), 345 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1025 transitions. [2021-06-05 14:39:22,917 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1025 transitions. Word has length 22 [2021-06-05 14:39:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:22,917 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1025 transitions. [2021-06-05 14:39:22,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1025 transitions. [2021-06-05 14:39:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:22,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:22,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:23,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:23,119 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:23,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1317993700, now seen corresponding path program 101 times [2021-06-05 14:39:23,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:23,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220722356] [2021-06-05 14:39:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:23,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220722356] [2021-06-05 14:39:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220722356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741914951] [2021-06-05 14:39:23,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:23,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:23,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:23,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741914951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:23,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:23,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:23,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992652443] [2021-06-05 14:39:23,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:23,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:23,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:23,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:23,400 INFO L87 Difference]: Start difference. First operand 346 states and 1025 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:23,863 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2021-06-05 14:39:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:23,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:23,865 INFO L225 Difference]: With dead ends: 655 [2021-06-05 14:39:23,865 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 14:39:23,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 14:39:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 354. [2021-06-05 14:39:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9830028328611897) internal successors, (1053), 353 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1053 transitions. [2021-06-05 14:39:23,869 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1053 transitions. Word has length 22 [2021-06-05 14:39:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:23,869 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1053 transitions. [2021-06-05 14:39:23,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1053 transitions. [2021-06-05 14:39:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:23,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:23,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:24,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:24,070 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1464954152, now seen corresponding path program 102 times [2021-06-05 14:39:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951453853] [2021-06-05 14:39:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:24,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951453853] [2021-06-05 14:39:24,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951453853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921004085] [2021-06-05 14:39:24,140 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:24,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:24,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:24,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921004085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:24,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:24,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:24,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878693380] [2021-06-05 14:39:24,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:24,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:24,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:24,346 INFO L87 Difference]: Start difference. First operand 354 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:24,689 INFO L93 Difference]: Finished difference Result 622 states and 1795 transitions. [2021-06-05 14:39:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:24,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:24,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:24,690 INFO L225 Difference]: With dead ends: 622 [2021-06-05 14:39:24,690 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 14:39:24,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 14:39:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 354. [2021-06-05 14:39:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.954674220963173) internal successors, (1043), 353 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1043 transitions. [2021-06-05 14:39:24,696 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1043 transitions. Word has length 22 [2021-06-05 14:39:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:24,696 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1043 transitions. [2021-06-05 14:39:24,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1043 transitions. [2021-06-05 14:39:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:24,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:24,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:24,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-05 14:39:24,920 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:24,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1287030692, now seen corresponding path program 103 times [2021-06-05 14:39:24,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:24,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868509531] [2021-06-05 14:39:24,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:24,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868509531] [2021-06-05 14:39:24,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868509531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425622134] [2021-06-05 14:39:24,995 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:25,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425622134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:25,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:25,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:25,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879905834] [2021-06-05 14:39:25,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:25,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:25,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:25,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:25,193 INFO L87 Difference]: Start difference. First operand 354 states and 1043 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:25,531 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2021-06-05 14:39:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:25,532 INFO L225 Difference]: With dead ends: 565 [2021-06-05 14:39:25,532 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 14:39:25,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 14:39:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 324. [2021-06-05 14:39:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 14:39:25,536 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 14:39:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:25,536 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 14:39:25,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 14:39:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:25,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:25,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:25,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:25,745 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1437395562, now seen corresponding path program 104 times [2021-06-05 14:39:25,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:25,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705565219] [2021-06-05 14:39:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:25,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:25,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705565219] [2021-06-05 14:39:25,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705565219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:25,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108061889] [2021-06-05 14:39:25,818 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:25,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:25,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:25,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:26,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108061889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:26,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:26,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:26,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585241759] [2021-06-05 14:39:26,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:26,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:26,025 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:26,271 INFO L93 Difference]: Finished difference Result 489 states and 1425 transitions. [2021-06-05 14:39:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:26,272 INFO L225 Difference]: With dead ends: 489 [2021-06-05 14:39:26,272 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:39:26,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:39:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 334. [2021-06-05 14:39:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.978978978978979) internal successors, (992), 333 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 992 transitions. [2021-06-05 14:39:26,276 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 992 transitions. Word has length 22 [2021-06-05 14:39:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:26,276 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 992 transitions. [2021-06-05 14:39:26,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 992 transitions. [2021-06-05 14:39:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:26,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:26,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:26,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:26,477 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:26,477 INFO L82 PathProgramCache]: Analyzing trace with hash 57207402, now seen corresponding path program 105 times [2021-06-05 14:39:26,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:26,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282011415] [2021-06-05 14:39:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:26,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:26,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282011415] [2021-06-05 14:39:26,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282011415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:26,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025041804] [2021-06-05 14:39:26,540 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:26,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:26,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:26,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:26,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025041804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:26,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:26,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:26,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229557069] [2021-06-05 14:39:26,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:26,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:26,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:26,753 INFO L87 Difference]: Start difference. First operand 334 states and 992 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:27,116 INFO L93 Difference]: Finished difference Result 516 states and 1492 transitions. [2021-06-05 14:39:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:27,117 INFO L225 Difference]: With dead ends: 516 [2021-06-05 14:39:27,117 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 14:39:27,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 14:39:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 331. [2021-06-05 14:39:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2021-06-05 14:39:27,121 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2021-06-05 14:39:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:27,121 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2021-06-05 14:39:27,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2021-06-05 14:39:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:27,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:27,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:27,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:27,322 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:27,322 INFO L82 PathProgramCache]: Analyzing trace with hash 482154612, now seen corresponding path program 106 times [2021-06-05 14:39:27,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:27,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177948362] [2021-06-05 14:39:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:27,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:27,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177948362] [2021-06-05 14:39:27,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177948362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:27,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989868116] [2021-06-05 14:39:27,382 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:27,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:27,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:27,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:27,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:27,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989868116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:27,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:27,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:27,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818197704] [2021-06-05 14:39:27,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:27,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:27,642 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:27,913 INFO L93 Difference]: Finished difference Result 477 states and 1390 transitions. [2021-06-05 14:39:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:27,914 INFO L225 Difference]: With dead ends: 477 [2021-06-05 14:39:27,914 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:39:27,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:39:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 328. [2021-06-05 14:39:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-05 14:39:27,918 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-05 14:39:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:27,918 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-05 14:39:27,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-05 14:39:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:27,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:27,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:28,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:28,119 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:28,119 INFO L82 PathProgramCache]: Analyzing trace with hash -332526258, now seen corresponding path program 107 times [2021-06-05 14:39:28,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:28,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909192689] [2021-06-05 14:39:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:28,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:28,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909192689] [2021-06-05 14:39:28,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909192689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:28,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697783050] [2021-06-05 14:39:28,196 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:28,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:28,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:28,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697783050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:28,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:28,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:28,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503619356] [2021-06-05 14:39:28,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:28,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:28,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:28,394 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:28,752 INFO L93 Difference]: Finished difference Result 607 states and 1761 transitions. [2021-06-05 14:39:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:28,753 INFO L225 Difference]: With dead ends: 607 [2021-06-05 14:39:28,753 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:39:28,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:39:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 338. [2021-06-05 14:39:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-05 14:39:28,757 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-05 14:39:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:28,757 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-05 14:39:28,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-05 14:39:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:28,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:28,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:28,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1201,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:28,959 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1162076706, now seen corresponding path program 108 times [2021-06-05 14:39:28,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:28,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301902502] [2021-06-05 14:39:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:29,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301902502] [2021-06-05 14:39:29,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301902502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:29,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969945955] [2021-06-05 14:39:29,033 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:29,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:29,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:29,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:29,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969945955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:29,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:29,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:29,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622025154] [2021-06-05 14:39:29,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:29,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:29,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:29,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:29,266 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:29,732 INFO L93 Difference]: Finished difference Result 651 states and 1869 transitions. [2021-06-05 14:39:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:29,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:29,733 INFO L225 Difference]: With dead ends: 651 [2021-06-05 14:39:29,733 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 14:39:29,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:29,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 14:39:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 345. [2021-06-05 14:39:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-05 14:39:29,737 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-05 14:39:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:29,737 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-05 14:39:29,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-05 14:39:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:29,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:29,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:29,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 14:39:29,938 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:29,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1682358634, now seen corresponding path program 109 times [2021-06-05 14:39:29,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:29,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832352763] [2021-06-05 14:39:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:30,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832352763] [2021-06-05 14:39:30,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832352763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291742812] [2021-06-05 14:39:30,005 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291742812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:30,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:30,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766942264] [2021-06-05 14:39:30,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:30,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:30,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:30,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:30,230 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:30,453 INFO L93 Difference]: Finished difference Result 540 states and 1570 transitions. [2021-06-05 14:39:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:30,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:30,454 INFO L225 Difference]: With dead ends: 540 [2021-06-05 14:39:30,454 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 14:39:30,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 14:39:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 336. [2021-06-05 14:39:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-06-05 14:39:30,458 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 22 [2021-06-05 14:39:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:30,458 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-06-05 14:39:30,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:30,458 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-06-05 14:39:30,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:30,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:30,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:30,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-05 14:39:30,659 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:30,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1100589218, now seen corresponding path program 110 times [2021-06-05 14:39:30,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:30,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713279979] [2021-06-05 14:39:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:30,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713279979] [2021-06-05 14:39:30,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713279979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806223356] [2021-06-05 14:39:30,725 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:30,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:30,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:30,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806223356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:30,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:30,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:30,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155418340] [2021-06-05 14:39:30,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:30,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:30,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:30,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:30,943 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:31,167 INFO L93 Difference]: Finished difference Result 556 states and 1597 transitions. [2021-06-05 14:39:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:31,169 INFO L225 Difference]: With dead ends: 556 [2021-06-05 14:39:31,169 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 14:39:31,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:31,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 14:39:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 342. [2021-06-05 14:39:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9794721407624634) internal successors, (1016), 341 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1016 transitions. [2021-06-05 14:39:31,174 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1016 transitions. Word has length 22 [2021-06-05 14:39:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:31,174 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1016 transitions. [2021-06-05 14:39:31,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1016 transitions. [2021-06-05 14:39:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:31,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:31,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:31,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1234 [2021-06-05 14:39:31,377 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:31,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:31,377 INFO L82 PathProgramCache]: Analyzing trace with hash 878028852, now seen corresponding path program 111 times [2021-06-05 14:39:31,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:31,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918395301] [2021-06-05 14:39:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:31,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918395301] [2021-06-05 14:39:31,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918395301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171247546] [2021-06-05 14:39:31,442 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:31,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:39:31,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:31,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171247546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:31,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:31,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:31,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91521915] [2021-06-05 14:39:31,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:31,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:31,653 INFO L87 Difference]: Start difference. First operand 342 states and 1016 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:32,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:32,117 INFO L93 Difference]: Finished difference Result 616 states and 1742 transitions. [2021-06-05 14:39:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:32,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:32,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:32,118 INFO L225 Difference]: With dead ends: 616 [2021-06-05 14:39:32,118 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 14:39:32,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 14:39:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 364. [2021-06-05 14:39:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.975206611570248) internal successors, (1080), 363 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1080 transitions. [2021-06-05 14:39:32,124 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1080 transitions. Word has length 22 [2021-06-05 14:39:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:32,124 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1080 transitions. [2021-06-05 14:39:32,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1080 transitions. [2021-06-05 14:39:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:32,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:32,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:32,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1246 [2021-06-05 14:39:32,337 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 695938540, now seen corresponding path program 112 times [2021-06-05 14:39:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014241818] [2021-06-05 14:39:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:32,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:32,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014241818] [2021-06-05 14:39:32,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014241818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:32,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526537949] [2021-06-05 14:39:32,408 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:32,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:32,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:32,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526537949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:32,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:32,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:32,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33173588] [2021-06-05 14:39:32,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:32,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:32,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:32,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:32,680 INFO L87 Difference]: Start difference. First operand 364 states and 1080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:33,066 INFO L93 Difference]: Finished difference Result 606 states and 1703 transitions. [2021-06-05 14:39:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:39:33,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:33,067 INFO L225 Difference]: With dead ends: 606 [2021-06-05 14:39:33,067 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 14:39:33,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 14:39:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 344. [2021-06-05 14:39:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.9737609329446064) internal successors, (1020), 343 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1020 transitions. [2021-06-05 14:39:33,076 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1020 transitions. Word has length 22 [2021-06-05 14:39:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:33,077 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1020 transitions. [2021-06-05 14:39:33,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1020 transitions. [2021-06-05 14:39:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:33,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:33,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:33,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 14:39:33,278 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash 266605730, now seen corresponding path program 113 times [2021-06-05 14:39:33,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:33,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113106689] [2021-06-05 14:39:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:33,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:33,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113106689] [2021-06-05 14:39:33,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113106689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019103454] [2021-06-05 14:39:33,337 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:33,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:33,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019103454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:33,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:33,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:33,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449179946] [2021-06-05 14:39:33,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:33,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:33,563 INFO L87 Difference]: Start difference. First operand 344 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:33,918 INFO L93 Difference]: Finished difference Result 474 states and 1386 transitions. [2021-06-05 14:39:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:33,919 INFO L225 Difference]: With dead ends: 474 [2021-06-05 14:39:33,919 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:39:33,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:39:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 350. [2021-06-05 14:39:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9598853868194843) internal successors, (1033), 349 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1033 transitions. [2021-06-05 14:39:33,923 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1033 transitions. Word has length 22 [2021-06-05 14:39:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:33,923 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1033 transitions. [2021-06-05 14:39:33,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1033 transitions. [2021-06-05 14:39:33,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:33,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:33,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:34,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:34,124 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:34,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1083226646, now seen corresponding path program 114 times [2021-06-05 14:39:34,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:34,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177736666] [2021-06-05 14:39:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:34,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177736666] [2021-06-05 14:39:34,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177736666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548281688] [2021-06-05 14:39:34,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:34,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:34,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:34,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548281688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:34,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:34,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:34,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062769414] [2021-06-05 14:39:34,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:34,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:34,375 INFO L87 Difference]: Start difference. First operand 350 states and 1033 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:34,715 INFO L93 Difference]: Finished difference Result 552 states and 1564 transitions. [2021-06-05 14:39:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:34,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:34,716 INFO L225 Difference]: With dead ends: 552 [2021-06-05 14:39:34,716 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 14:39:34,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 14:39:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2021-06-05 14:39:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9568733153638815) internal successors, (1097), 371 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1097 transitions. [2021-06-05 14:39:34,720 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1097 transitions. Word has length 22 [2021-06-05 14:39:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:34,720 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1097 transitions. [2021-06-05 14:39:34,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1097 transitions. [2021-06-05 14:39:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:34,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:34,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:34,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-06-05 14:39:34,921 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:34,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:34,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1265316958, now seen corresponding path program 115 times [2021-06-05 14:39:34,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:34,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379927324] [2021-06-05 14:39:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:34,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:34,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379927324] [2021-06-05 14:39:34,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379927324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937639996] [2021-06-05 14:39:34,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:35,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:35,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937639996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:35,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:35,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:35,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148347115] [2021-06-05 14:39:35,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:35,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:35,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:35,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:35,176 INFO L87 Difference]: Start difference. First operand 372 states and 1097 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:35,481 INFO L93 Difference]: Finished difference Result 509 states and 1453 transitions. [2021-06-05 14:39:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:35,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:35,482 INFO L225 Difference]: With dead ends: 509 [2021-06-05 14:39:35,482 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 14:39:35,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:39:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 14:39:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 346. [2021-06-05 14:39:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9681159420289855) internal successors, (1024), 345 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1024 transitions. [2021-06-05 14:39:35,486 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1024 transitions. Word has length 22 [2021-06-05 14:39:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:35,486 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1024 transitions. [2021-06-05 14:39:35,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1024 transitions. [2021-06-05 14:39:35,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:35,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:35,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:35,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:35,687 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:35,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1974888418, now seen corresponding path program 116 times [2021-06-05 14:39:35,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:35,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987474581] [2021-06-05 14:39:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:35,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987474581] [2021-06-05 14:39:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987474581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714103539] [2021-06-05 14:39:35,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:35,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:35,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:35,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:35,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714103539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:35,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:35,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:35,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723421469] [2021-06-05 14:39:35,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:35,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:35,944 INFO L87 Difference]: Start difference. First operand 346 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:36,182 INFO L93 Difference]: Finished difference Result 472 states and 1360 transitions. [2021-06-05 14:39:36,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:36,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:36,183 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:39:36,183 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:39:36,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:36,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:39:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2021-06-05 14:39:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.954022988505747) internal successors, (1028), 348 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1028 transitions. [2021-06-05 14:39:36,187 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1028 transitions. Word has length 22 [2021-06-05 14:39:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:36,187 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1028 transitions. [2021-06-05 14:39:36,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1028 transitions. [2021-06-05 14:39:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:36,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:36,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:36,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 14:39:36,388 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:36,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:36,388 INFO L82 PathProgramCache]: Analyzing trace with hash -480285454, now seen corresponding path program 117 times [2021-06-05 14:39:36,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:36,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719776958] [2021-06-05 14:39:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:36,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:36,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719776958] [2021-06-05 14:39:36,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719776958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:36,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694758326] [2021-06-05 14:39:36,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:36,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:36,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694758326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:36,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:36,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:36,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462369684] [2021-06-05 14:39:36,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:36,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:36,639 INFO L87 Difference]: Start difference. First operand 349 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:36,935 INFO L93 Difference]: Finished difference Result 499 states and 1424 transitions. [2021-06-05 14:39:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:36,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:36,936 INFO L225 Difference]: With dead ends: 499 [2021-06-05 14:39:36,936 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 14:39:36,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 14:39:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 346. [2021-06-05 14:39:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1016 transitions. [2021-06-05 14:39:36,940 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1016 transitions. Word has length 22 [2021-06-05 14:39:36,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:36,940 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1016 transitions. [2021-06-05 14:39:36,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1016 transitions. [2021-06-05 14:39:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:36,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:36,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:37,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1306 [2021-06-05 14:39:37,141 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -55338244, now seen corresponding path program 118 times [2021-06-05 14:39:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:37,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496363817] [2021-06-05 14:39:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:37,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496363817] [2021-06-05 14:39:37,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496363817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56890722] [2021-06-05 14:39:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:37,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:37,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:37,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:37,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:37,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56890722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:37,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:37,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:37,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336111699] [2021-06-05 14:39:37,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:37,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:37,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:37,393 INFO L87 Difference]: Start difference. First operand 346 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:37,629 INFO L93 Difference]: Finished difference Result 450 states and 1308 transitions. [2021-06-05 14:39:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:37,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:37,630 INFO L225 Difference]: With dead ends: 450 [2021-06-05 14:39:37,630 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 14:39:37,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 14:39:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 328. [2021-06-05 14:39:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-05 14:39:37,634 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-05 14:39:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:37,634 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-05 14:39:37,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-05 14:39:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:37,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:37,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:37,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-06-05 14:39:37,835 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:37,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:37,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1651654990, now seen corresponding path program 119 times [2021-06-05 14:39:37,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:37,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673237469] [2021-06-05 14:39:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:37,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:37,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673237469] [2021-06-05 14:39:37,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673237469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:37,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673946466] [2021-06-05 14:39:37,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:37,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:37,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:37,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:38,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673946466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:38,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:38,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:38,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79487053] [2021-06-05 14:39:38,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:38,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:38,104 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:38,371 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2021-06-05 14:39:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:38,372 INFO L225 Difference]: With dead ends: 531 [2021-06-05 14:39:38,372 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:39:38,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:39:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 340. [2021-06-05 14:39:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-05 14:39:38,376 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-05 14:39:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:38,376 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-05 14:39:38,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-05 14:39:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:38,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:38,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:38,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:38,577 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:38,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1148709342, now seen corresponding path program 120 times [2021-06-05 14:39:38,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:38,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533177901] [2021-06-05 14:39:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:38,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533177901] [2021-06-05 14:39:38,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533177901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584438903] [2021-06-05 14:39:38,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:38,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:38,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:38,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584438903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:38,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:38,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:38,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696328897] [2021-06-05 14:39:38,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:38,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:38,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:38,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:38,851 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:39,130 INFO L93 Difference]: Finished difference Result 503 states and 1458 transitions. [2021-06-05 14:39:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:39,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:39,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:39,131 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:39:39,131 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 14:39:39,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 14:39:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 347. [2021-06-05 14:39:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-05 14:39:39,135 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-05 14:39:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:39,135 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-05 14:39:39,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-05 14:39:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:39,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:39,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:39,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 14:39:39,336 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1467821662, now seen corresponding path program 121 times [2021-06-05 14:39:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:39,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638416984] [2021-06-05 14:39:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:39,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:39,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638416984] [2021-06-05 14:39:39,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638416984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:39,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204226968] [2021-06-05 14:39:39,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:39,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:39,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:39,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204226968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:39,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:39,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:39,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397600712] [2021-06-05 14:39:39,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:39,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:39,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:39,596 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:39,836 INFO L93 Difference]: Finished difference Result 431 states and 1272 transitions. [2021-06-05 14:39:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:39,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:39,837 INFO L225 Difference]: With dead ends: 431 [2021-06-05 14:39:39,837 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 14:39:39,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 14:39:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 325. [2021-06-05 14:39:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-05 14:39:39,842 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-05 14:39:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:39,842 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-05 14:39:39,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-05 14:39:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:39,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:39,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:40,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:40,057 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:40,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:40,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1676258398, now seen corresponding path program 122 times [2021-06-05 14:39:40,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:40,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479296075] [2021-06-05 14:39:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:40,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:40,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479296075] [2021-06-05 14:39:40,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479296075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:40,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807008390] [2021-06-05 14:39:40,130 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:40,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:40,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:40,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807008390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:40,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:40,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:40,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492686760] [2021-06-05 14:39:40,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:40,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:40,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:40,353 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:40,670 INFO L93 Difference]: Finished difference Result 688 states and 1965 transitions. [2021-06-05 14:39:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:40,672 INFO L225 Difference]: With dead ends: 688 [2021-06-05 14:39:40,672 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 14:39:40,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 14:39:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 339. [2021-06-05 14:39:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2021-06-05 14:39:40,676 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 22 [2021-06-05 14:39:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:40,676 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2021-06-05 14:39:40,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2021-06-05 14:39:40,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:40,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:40,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:40,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 14:39:40,877 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:40,877 INFO L82 PathProgramCache]: Analyzing trace with hash -181655434, now seen corresponding path program 123 times [2021-06-05 14:39:40,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:40,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664300337] [2021-06-05 14:39:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:40,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:40,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664300337] [2021-06-05 14:39:40,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664300337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:40,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007014198] [2021-06-05 14:39:40,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:41,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:41,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:41,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:41,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007014198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:41,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:41,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863053093] [2021-06-05 14:39:41,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:41,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:41,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:41,167 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:41,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:41,410 INFO L93 Difference]: Finished difference Result 627 states and 1798 transitions. [2021-06-05 14:39:41,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:41,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:41,412 INFO L225 Difference]: With dead ends: 627 [2021-06-05 14:39:41,412 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 14:39:41,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 14:39:41,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 346. [2021-06-05 14:39:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.991304347826087) internal successors, (1032), 345 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1032 transitions. [2021-06-05 14:39:41,418 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1032 transitions. Word has length 22 [2021-06-05 14:39:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:41,418 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1032 transitions. [2021-06-05 14:39:41,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1032 transitions. [2021-06-05 14:39:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:41,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:41,419 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:41,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-05 14:39:41,633 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:41,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1268876522, now seen corresponding path program 124 times [2021-06-05 14:39:41,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:41,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615072450] [2021-06-05 14:39:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:41,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615072450] [2021-06-05 14:39:41,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615072450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596714068] [2021-06-05 14:39:41,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:41,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:41,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:41,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596714068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:41,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:41,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:41,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105515416] [2021-06-05 14:39:41,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:41,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:41,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:41,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:41,948 INFO L87 Difference]: Start difference. First operand 346 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:42,195 INFO L93 Difference]: Finished difference Result 621 states and 1807 transitions. [2021-06-05 14:39:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:42,196 INFO L225 Difference]: With dead ends: 621 [2021-06-05 14:39:42,196 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 14:39:42,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 14:39:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 352. [2021-06-05 14:39:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.017094017094017) internal successors, (1059), 351 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1059 transitions. [2021-06-05 14:39:42,200 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1059 transitions. Word has length 22 [2021-06-05 14:39:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:42,200 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1059 transitions. [2021-06-05 14:39:42,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1059 transitions. [2021-06-05 14:39:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:42,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:42,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:42,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 14:39:42,401 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:42,402 INFO L82 PathProgramCache]: Analyzing trace with hash -243142922, now seen corresponding path program 125 times [2021-06-05 14:39:42,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:42,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248255698] [2021-06-05 14:39:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:42,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248255698] [2021-06-05 14:39:42,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248255698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578554470] [2021-06-05 14:39:42,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:42,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:42,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:42,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578554470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:42,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:42,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:42,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369162505] [2021-06-05 14:39:42,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:42,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:42,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:42,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:42,689 INFO L87 Difference]: Start difference. First operand 352 states and 1059 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:42,954 INFO L93 Difference]: Finished difference Result 637 states and 1834 transitions. [2021-06-05 14:39:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:42,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:42,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:42,955 INFO L225 Difference]: With dead ends: 637 [2021-06-05 14:39:42,955 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 14:39:42,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 14:39:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 358. [2021-06-05 14:39:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2021-06-05 14:39:42,959 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2021-06-05 14:39:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:42,959 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2021-06-05 14:39:42,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2021-06-05 14:39:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:42,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:42,960 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:43,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-06-05 14:39:43,160 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -465703288, now seen corresponding path program 126 times [2021-06-05 14:39:43,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:43,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179515328] [2021-06-05 14:39:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179515328] [2021-06-05 14:39:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179515328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099454701] [2021-06-05 14:39:43,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:43,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:43,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:43,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099454701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:43,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:43,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740947543] [2021-06-05 14:39:43,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:43,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:43,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:43,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:43,433 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:43,706 INFO L93 Difference]: Finished difference Result 592 states and 1704 transitions. [2021-06-05 14:39:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:43,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:43,707 INFO L225 Difference]: With dead ends: 592 [2021-06-05 14:39:43,707 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 14:39:43,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 14:39:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 370. [2021-06-05 14:39:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.005420054200542) internal successors, (1109), 369 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1109 transitions. [2021-06-05 14:39:43,711 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1109 transitions. Word has length 22 [2021-06-05 14:39:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:43,712 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1109 transitions. [2021-06-05 14:39:43,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1109 transitions. [2021-06-05 14:39:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:43,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:43,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:43,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-05 14:39:43,913 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash -647793600, now seen corresponding path program 127 times [2021-06-05 14:39:43,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:43,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881539922] [2021-06-05 14:39:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:43,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:43,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881539922] [2021-06-05 14:39:43,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881539922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:43,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943822715] [2021-06-05 14:39:43,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:44,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:44,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943822715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:44,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:44,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:39:44,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960185153] [2021-06-05 14:39:44,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:39:44,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:39:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:39:44,208 INFO L87 Difference]: Start difference. First operand 370 states and 1109 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:44,466 INFO L93 Difference]: Finished difference Result 623 states and 1767 transitions. [2021-06-05 14:39:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:44,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:39:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:44,467 INFO L225 Difference]: With dead ends: 623 [2021-06-05 14:39:44,467 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 14:39:44,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 14:39:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 366. [2021-06-05 14:39:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.0054794520547947) internal successors, (1097), 365 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1097 transitions. [2021-06-05 14:39:44,473 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1097 transitions. Word has length 22 [2021-06-05 14:39:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:44,474 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1097 transitions. [2021-06-05 14:39:44,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1097 transitions. [2021-06-05 14:39:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:44,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:44,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:44,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:44,695 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1770086426, now seen corresponding path program 128 times [2021-06-05 14:39:44,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:44,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190683771] [2021-06-05 14:39:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:44,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:44,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190683771] [2021-06-05 14:39:44,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190683771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:44,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315895655] [2021-06-05 14:39:44,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:44,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:44,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:44,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:44,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:44,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315895655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:44,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:44,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:44,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719377629] [2021-06-05 14:39:44,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:44,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:44,991 INFO L87 Difference]: Start difference. First operand 366 states and 1097 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:45,326 INFO L93 Difference]: Finished difference Result 571 states and 1657 transitions. [2021-06-05 14:39:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:45,327 INFO L225 Difference]: With dead ends: 571 [2021-06-05 14:39:45,327 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 14:39:45,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:39:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 14:39:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 371. [2021-06-05 14:39:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0) internal successors, (1110), 370 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1110 transitions. [2021-06-05 14:39:45,332 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1110 transitions. Word has length 22 [2021-06-05 14:39:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:45,332 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1110 transitions. [2021-06-05 14:39:45,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1110 transitions. [2021-06-05 14:39:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:45,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:45,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:45,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 14:39:45,533 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:45,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1030277906, now seen corresponding path program 129 times [2021-06-05 14:39:45,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:45,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041622643] [2021-06-05 14:39:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:45,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:45,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041622643] [2021-06-05 14:39:45,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041622643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:45,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750861127] [2021-06-05 14:39:45,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:45,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:45,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750861127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:45,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:45,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:45,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686800084] [2021-06-05 14:39:45,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:45,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:45,819 INFO L87 Difference]: Start difference. First operand 371 states and 1110 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:46,061 INFO L93 Difference]: Finished difference Result 543 states and 1580 transitions. [2021-06-05 14:39:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:39:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:46,062 INFO L225 Difference]: With dead ends: 543 [2021-06-05 14:39:46,062 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 14:39:46,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:39:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 14:39:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 350. [2021-06-05 14:39:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9713467048710602) internal successors, (1037), 349 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1037 transitions. [2021-06-05 14:39:46,066 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1037 transitions. Word has length 22 [2021-06-05 14:39:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:46,066 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1037 transitions. [2021-06-05 14:39:46,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1037 transitions. [2021-06-05 14:39:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:46,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:46,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:46,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1409,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:46,269 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:46,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:46,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1576611606, now seen corresponding path program 130 times [2021-06-05 14:39:46,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:46,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838146230] [2021-06-05 14:39:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:46,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:46,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838146230] [2021-06-05 14:39:46,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838146230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:46,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286717042] [2021-06-05 14:39:46,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:46,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:46,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:46,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:46,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286717042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:46,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:46,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:46,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363993692] [2021-06-05 14:39:46,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:46,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:46,566 INFO L87 Difference]: Start difference. First operand 350 states and 1037 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:46,877 INFO L93 Difference]: Finished difference Result 476 states and 1410 transitions. [2021-06-05 14:39:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:46,878 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:39:46,878 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:39:46,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:39:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 347. [2021-06-05 14:39:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9710982658959537) internal successors, (1028), 346 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1028 transitions. [2021-06-05 14:39:46,882 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1028 transitions. Word has length 22 [2021-06-05 14:39:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:46,882 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1028 transitions. [2021-06-05 14:39:46,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1028 transitions. [2021-06-05 14:39:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:46,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:46,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:47,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:47,083 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -852679658, now seen corresponding path program 131 times [2021-06-05 14:39:47,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:47,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607791754] [2021-06-05 14:39:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:47,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:47,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607791754] [2021-06-05 14:39:47,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607791754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:47,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800576490] [2021-06-05 14:39:47,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:47,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:47,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:47,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:47,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800576490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:47,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:47,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:47,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611102333] [2021-06-05 14:39:47,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:47,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:47,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:47,378 INFO L87 Difference]: Start difference. First operand 347 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:47,623 INFO L93 Difference]: Finished difference Result 525 states and 1504 transitions. [2021-06-05 14:39:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:47,624 INFO L225 Difference]: With dead ends: 525 [2021-06-05 14:39:47,624 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 14:39:47,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 14:39:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 355. [2021-06-05 14:39:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.983050847457627) internal successors, (1056), 354 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1056 transitions. [2021-06-05 14:39:47,628 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1056 transitions. Word has length 22 [2021-06-05 14:39:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:47,628 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1056 transitions. [2021-06-05 14:39:47,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1056 transitions. [2021-06-05 14:39:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:47,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:47,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:47,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 14:39:47,830 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:47,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1930268194, now seen corresponding path program 132 times [2021-06-05 14:39:47,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:47,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414700676] [2021-06-05 14:39:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:47,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:47,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414700676] [2021-06-05 14:39:47,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414700676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:47,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11841116] [2021-06-05 14:39:47,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:47,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:39:47,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:48,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11841116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:48,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:48,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845271489] [2021-06-05 14:39:48,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:48,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:48,100 INFO L87 Difference]: Start difference. First operand 355 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:48,424 INFO L93 Difference]: Finished difference Result 496 states and 1427 transitions. [2021-06-05 14:39:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:48,425 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:39:48,425 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 14:39:48,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 14:39:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 355. [2021-06-05 14:39:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.9548022598870056) internal successors, (1046), 354 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1046 transitions. [2021-06-05 14:39:48,429 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1046 transitions. Word has length 22 [2021-06-05 14:39:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:48,429 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1046 transitions. [2021-06-05 14:39:48,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1046 transitions. [2021-06-05 14:39:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:48,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:48,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:48,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-05 14:39:48,630 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1752344734, now seen corresponding path program 133 times [2021-06-05 14:39:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:48,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324113941] [2021-06-05 14:39:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:48,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:48,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324113941] [2021-06-05 14:39:48,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324113941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:48,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267348813] [2021-06-05 14:39:48,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:48,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:48,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267348813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:48,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:48,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:48,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161066607] [2021-06-05 14:39:48,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:48,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:48,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:48,924 INFO L87 Difference]: Start difference. First operand 355 states and 1046 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:49,209 INFO L93 Difference]: Finished difference Result 435 states and 1284 transitions. [2021-06-05 14:39:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:49,210 INFO L225 Difference]: With dead ends: 435 [2021-06-05 14:39:49,210 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:39:49,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:39:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:39:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-06-05 14:39:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 14:39:49,216 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 14:39:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:49,216 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 14:39:49,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 14:39:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:49,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:49,217 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:49,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-05 14:39:49,439 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:49,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1705035186, now seen corresponding path program 134 times [2021-06-05 14:39:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:49,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123284512] [2021-06-05 14:39:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:49,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:49,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123284512] [2021-06-05 14:39:49,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123284512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:49,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465262528] [2021-06-05 14:39:49,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:49,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:49,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:49,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:49,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:49,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465262528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:49,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:49,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:49,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892382073] [2021-06-05 14:39:49,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:49,734 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:50,060 INFO L93 Difference]: Finished difference Result 750 states and 2186 transitions. [2021-06-05 14:39:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:50,061 INFO L225 Difference]: With dead ends: 750 [2021-06-05 14:39:50,061 INFO L226 Difference]: Without dead ends: 750 [2021-06-05 14:39:50,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-05 14:39:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 344. [2021-06-05 14:39:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.008746355685131) internal successors, (1032), 343 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1032 transitions. [2021-06-05 14:39:50,066 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1032 transitions. Word has length 22 [2021-06-05 14:39:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:50,066 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1032 transitions. [2021-06-05 14:39:50,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1032 transitions. [2021-06-05 14:39:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:50,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:50,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:50,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1448 [2021-06-05 14:39:50,267 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:50,267 INFO L82 PathProgramCache]: Analyzing trace with hash -210432222, now seen corresponding path program 135 times [2021-06-05 14:39:50,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:50,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405900264] [2021-06-05 14:39:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:50,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405900264] [2021-06-05 14:39:50,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405900264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988404231] [2021-06-05 14:39:50,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:50,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:50,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988404231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:50,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:50,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347759309] [2021-06-05 14:39:50,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:50,580 INFO L87 Difference]: Start difference. First operand 344 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:51,165 INFO L93 Difference]: Finished difference Result 773 states and 2241 transitions. [2021-06-05 14:39:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:39:51,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:51,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:51,166 INFO L225 Difference]: With dead ends: 773 [2021-06-05 14:39:51,166 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 14:39:51,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:39:51,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 14:39:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 341. [2021-06-05 14:39:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0) internal successors, (1020), 340 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1020 transitions. [2021-06-05 14:39:51,171 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1020 transitions. Word has length 22 [2021-06-05 14:39:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:51,171 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1020 transitions. [2021-06-05 14:39:51,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1020 transitions. [2021-06-05 14:39:51,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:51,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:51,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:51,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 14:39:51,372 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:51,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:51,372 INFO L82 PathProgramCache]: Analyzing trace with hash 214514988, now seen corresponding path program 136 times [2021-06-05 14:39:51,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:51,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870796300] [2021-06-05 14:39:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:51,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:51,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870796300] [2021-06-05 14:39:51,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870796300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:51,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516325859] [2021-06-05 14:39:51,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:51,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:51,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516325859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:51,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:51,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:51,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462107248] [2021-06-05 14:39:51,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:51,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:51,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:51,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:51,663 INFO L87 Difference]: Start difference. First operand 341 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:52,071 INFO L93 Difference]: Finished difference Result 747 states and 2178 transitions. [2021-06-05 14:39:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:39:52,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:52,072 INFO L225 Difference]: With dead ends: 747 [2021-06-05 14:39:52,072 INFO L226 Difference]: Without dead ends: 727 [2021-06-05 14:39:52,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:39:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-05 14:39:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 338. [2021-06-05 14:39:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9910979228486645) internal successors, (1008), 337 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1008 transitions. [2021-06-05 14:39:52,078 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1008 transitions. Word has length 22 [2021-06-05 14:39:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:52,078 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1008 transitions. [2021-06-05 14:39:52,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,078 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1008 transitions. [2021-06-05 14:39:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:52,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:52,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:52,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 14:39:52,301 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1986111548, now seen corresponding path program 137 times [2021-06-05 14:39:52,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:52,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164254125] [2021-06-05 14:39:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:52,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:52,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164254125] [2021-06-05 14:39:52,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164254125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:52,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246094401] [2021-06-05 14:39:52,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:52,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:52,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:52,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246094401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:52,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:52,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:52,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635661138] [2021-06-05 14:39:52,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:52,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:52,571 INFO L87 Difference]: Start difference. First operand 338 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:52,917 INFO L93 Difference]: Finished difference Result 756 states and 2173 transitions. [2021-06-05 14:39:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:52,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:52,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:52,918 INFO L225 Difference]: With dead ends: 756 [2021-06-05 14:39:52,918 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 14:39:52,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:52,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 14:39:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 332. [2021-06-05 14:39:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-05 14:39:52,922 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 22 [2021-06-05 14:39:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:52,922 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-05 14:39:52,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-05 14:39:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:52,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:52,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:53,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1481,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:53,123 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1654265104, now seen corresponding path program 138 times [2021-06-05 14:39:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:53,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187486684] [2021-06-05 14:39:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:53,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187486684] [2021-06-05 14:39:53,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187486684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159138038] [2021-06-05 14:39:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:53,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:39:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:53,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:53,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:53,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159138038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:53,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:53,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:53,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138282666] [2021-06-05 14:39:53,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:53,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:53,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:53,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:53,425 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:53,803 INFO L93 Difference]: Finished difference Result 659 states and 1924 transitions. [2021-06-05 14:39:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:53,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:53,804 INFO L225 Difference]: With dead ends: 659 [2021-06-05 14:39:53,804 INFO L226 Difference]: Without dead ends: 659 [2021-06-05 14:39:53,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-05 14:39:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 340. [2021-06-05 14:39:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0) internal successors, (1017), 339 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1017 transitions. [2021-06-05 14:39:53,809 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1017 transitions. Word has length 22 [2021-06-05 14:39:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:53,809 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1017 transitions. [2021-06-05 14:39:53,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1017 transitions. [2021-06-05 14:39:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:53,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:53,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:54,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1489 [2021-06-05 14:39:54,010 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash -159662140, now seen corresponding path program 139 times [2021-06-05 14:39:54,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:54,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345398262] [2021-06-05 14:39:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:54,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:54,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345398262] [2021-06-05 14:39:54,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345398262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:54,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829453586] [2021-06-05 14:39:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:54,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829453586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:54,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:54,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:54,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038485519] [2021-06-05 14:39:54,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:54,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:54,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:54,319 INFO L87 Difference]: Start difference. First operand 340 states and 1017 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:55,172 INFO L93 Difference]: Finished difference Result 743 states and 2162 transitions. [2021-06-05 14:39:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:39:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:55,173 INFO L225 Difference]: With dead ends: 743 [2021-06-05 14:39:55,173 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 14:39:55,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 792.3ms TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:39:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 14:39:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 337. [2021-06-05 14:39:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-06-05 14:39:55,178 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 22 [2021-06-05 14:39:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:55,178 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-06-05 14:39:55,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-06-05 14:39:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:55,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:55,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:55,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:55,379 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:55,379 INFO L82 PathProgramCache]: Analyzing trace with hash 265285070, now seen corresponding path program 140 times [2021-06-05 14:39:55,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:55,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581026017] [2021-06-05 14:39:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:55,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:55,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581026017] [2021-06-05 14:39:55,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581026017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:55,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523712056] [2021-06-05 14:39:55,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:55,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:39:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:55,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:55,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523712056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:55,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:55,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:55,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723206457] [2021-06-05 14:39:55,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:55,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:55,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:55,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:55,697 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:56,222 INFO L93 Difference]: Finished difference Result 667 states and 1949 transitions. [2021-06-05 14:39:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:39:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:56,223 INFO L225 Difference]: With dead ends: 667 [2021-06-05 14:39:56,223 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 14:39:56,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:39:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 14:39:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 334. [2021-06-05 14:39:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-06-05 14:39:56,227 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 22 [2021-06-05 14:39:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:56,227 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-06-05 14:39:56,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-06-05 14:39:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:56,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:56,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:56,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-05 14:39:56,428 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash -549395800, now seen corresponding path program 141 times [2021-06-05 14:39:56,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:56,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242340890] [2021-06-05 14:39:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:56,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242340890] [2021-06-05 14:39:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242340890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518448488] [2021-06-05 14:39:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:56,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:39:56,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:56,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:56,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518448488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:56,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:56,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:56,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489777626] [2021-06-05 14:39:56,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:56,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:56,732 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:57,282 INFO L93 Difference]: Finished difference Result 777 states and 2260 transitions. [2021-06-05 14:39:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:39:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:57,284 INFO L225 Difference]: With dead ends: 777 [2021-06-05 14:39:57,284 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 14:39:57,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:39:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 14:39:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 344. [2021-06-05 14:39:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0320699708454812) internal successors, (1040), 343 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1040 transitions. [2021-06-05 14:39:57,288 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1040 transitions. Word has length 22 [2021-06-05 14:39:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:57,288 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1040 transitions. [2021-06-05 14:39:57,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1040 transitions. [2021-06-05 14:39:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:57,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:57,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:57,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-05 14:39:57,490 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash 945207164, now seen corresponding path program 142 times [2021-06-05 14:39:57,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:57,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020257559] [2021-06-05 14:39:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:57,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:57,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020257559] [2021-06-05 14:39:57,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020257559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:57,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609310294] [2021-06-05 14:39:57,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:57,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:39:57,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609310294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:57,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:57,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:57,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245367847] [2021-06-05 14:39:57,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:57,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:57,841 INFO L87 Difference]: Start difference. First operand 344 states and 1040 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:58,897 INFO L93 Difference]: Finished difference Result 860 states and 2485 transitions. [2021-06-05 14:39:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:39:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:58,898 INFO L225 Difference]: With dead ends: 860 [2021-06-05 14:39:58,898 INFO L226 Difference]: Without dead ends: 850 [2021-06-05 14:39:58,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 940.5ms TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:39:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-05 14:39:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 351. [2021-06-05 14:39:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0114285714285716) internal successors, (1054), 350 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1054 transitions. [2021-06-05 14:39:58,903 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1054 transitions. Word has length 22 [2021-06-05 14:39:58,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:58,904 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1054 transitions. [2021-06-05 14:39:58,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1054 transitions. [2021-06-05 14:39:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:58,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:58,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:39:59,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:59,105 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:39:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:39:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1899228176, now seen corresponding path program 143 times [2021-06-05 14:39:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:39:59,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941417906] [2021-06-05 14:39:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:39:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:39:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:39:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941417906] [2021-06-05 14:39:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941417906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777801798] [2021-06-05 14:39:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:39:59,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:39:59,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:39:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:39:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:39:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:39:59,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777801798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:39:59,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:39:59,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:39:59,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341529392] [2021-06-05 14:39:59,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:39:59,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:39:59,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:39:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:39:59,458 INFO L87 Difference]: Start difference. First operand 351 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:39:59,851 INFO L93 Difference]: Finished difference Result 710 states and 2069 transitions. [2021-06-05 14:39:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:39:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:39:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:39:59,852 INFO L225 Difference]: With dead ends: 710 [2021-06-05 14:39:59,852 INFO L226 Difference]: Without dead ends: 710 [2021-06-05 14:39:59,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:39:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-05 14:39:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 342. [2021-06-05 14:39:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0175953079178885) internal successors, (1029), 341 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1029 transitions. [2021-06-05 14:39:59,857 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1029 transitions. Word has length 22 [2021-06-05 14:39:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:39:59,857 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1029 transitions. [2021-06-05 14:39:59,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:39:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1029 transitions. [2021-06-05 14:39:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:39:59,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:39:59,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:00,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-06-05 14:40:00,058 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:00,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:00,058 INFO L82 PathProgramCache]: Analyzing trace with hash 883719676, now seen corresponding path program 144 times [2021-06-05 14:40:00,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:00,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793101004] [2021-06-05 14:40:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:00,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793101004] [2021-06-05 14:40:00,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793101004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285389296] [2021-06-05 14:40:00,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:00,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:40:00,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:00,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:00,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285389296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:00,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:00,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:00,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915955732] [2021-06-05 14:40:00,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:00,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:00,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:00,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:00,339 INFO L87 Difference]: Start difference. First operand 342 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:00,714 INFO L93 Difference]: Finished difference Result 701 states and 2021 transitions. [2021-06-05 14:40:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:00,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:00,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:00,715 INFO L225 Difference]: With dead ends: 701 [2021-06-05 14:40:00,715 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 14:40:00,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 14:40:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 348. [2021-06-05 14:40:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0) internal successors, (1041), 347 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1041 transitions. [2021-06-05 14:40:00,719 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1041 transitions. Word has length 22 [2021-06-05 14:40:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:00,719 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1041 transitions. [2021-06-05 14:40:00,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1041 transitions. [2021-06-05 14:40:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:00,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:00,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:00,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:00,920 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 661159310, now seen corresponding path program 145 times [2021-06-05 14:40:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:00,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079749596] [2021-06-05 14:40:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:00,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079749596] [2021-06-05 14:40:00,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079749596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:00,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593071887] [2021-06-05 14:40:00,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:01,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:01,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593071887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:01,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:01,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:01,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410787975] [2021-06-05 14:40:01,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:01,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:01,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:01,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:01,206 INFO L87 Difference]: Start difference. First operand 348 states and 1041 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:02,167 INFO L93 Difference]: Finished difference Result 796 states and 2271 transitions. [2021-06-05 14:40:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:40:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:02,168 INFO L225 Difference]: With dead ends: 796 [2021-06-05 14:40:02,168 INFO L226 Difference]: Without dead ends: 786 [2021-06-05 14:40:02,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 833.0ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:40:02,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-05 14:40:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 370. [2021-06-05 14:40:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.994579945799458) internal successors, (1105), 369 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1105 transitions. [2021-06-05 14:40:02,173 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1105 transitions. Word has length 22 [2021-06-05 14:40:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:02,173 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1105 transitions. [2021-06-05 14:40:02,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1105 transitions. [2021-06-05 14:40:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:02,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:02,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:02,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:02,374 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 479068998, now seen corresponding path program 146 times [2021-06-05 14:40:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:02,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392370299] [2021-06-05 14:40:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:02,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:02,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392370299] [2021-06-05 14:40:02,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392370299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:02,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790867625] [2021-06-05 14:40:02,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:02,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:02,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790867625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:02,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:02,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:02,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334886749] [2021-06-05 14:40:02,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:02,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:02,671 INFO L87 Difference]: Start difference. First operand 370 states and 1105 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:03,523 INFO L93 Difference]: Finished difference Result 786 states and 2232 transitions. [2021-06-05 14:40:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:40:03,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:03,524 INFO L225 Difference]: With dead ends: 786 [2021-06-05 14:40:03,524 INFO L226 Difference]: Without dead ends: 774 [2021-06-05 14:40:03,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:40:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-05 14:40:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 350. [2021-06-05 14:40:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.994269340974212) internal successors, (1045), 349 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1045 transitions. [2021-06-05 14:40:03,531 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1045 transitions. Word has length 22 [2021-06-05 14:40:03,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:03,531 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1045 transitions. [2021-06-05 14:40:03,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1045 transitions. [2021-06-05 14:40:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:03,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:03,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:03,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1584 [2021-06-05 14:40:03,754 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash 49736188, now seen corresponding path program 147 times [2021-06-05 14:40:03,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:03,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964357256] [2021-06-05 14:40:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:03,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964357256] [2021-06-05 14:40:03,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964357256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885354992] [2021-06-05 14:40:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:03,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:03,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:03,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885354992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:04,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:04,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733458055] [2021-06-05 14:40:04,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:04,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:04,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:04,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:04,026 INFO L87 Difference]: Start difference. First operand 350 states and 1045 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:04,470 INFO L93 Difference]: Finished difference Result 649 states and 1895 transitions. [2021-06-05 14:40:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:40:04,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:04,471 INFO L225 Difference]: With dead ends: 649 [2021-06-05 14:40:04,471 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 14:40:04,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 14:40:04,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 356. [2021-06-05 14:40:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.980281690140845) internal successors, (1058), 355 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1058 transitions. [2021-06-05 14:40:04,476 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1058 transitions. Word has length 22 [2021-06-05 14:40:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:04,476 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1058 transitions. [2021-06-05 14:40:04,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1058 transitions. [2021-06-05 14:40:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:04,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:04,476 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:04,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-05 14:40:04,677 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:04,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1300096188, now seen corresponding path program 148 times [2021-06-05 14:40:04,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:04,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655662936] [2021-06-05 14:40:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:04,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655662936] [2021-06-05 14:40:04,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655662936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769878760] [2021-06-05 14:40:04,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:04,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:04,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:04,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:04,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:04,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769878760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:04,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:04,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:04,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110419479] [2021-06-05 14:40:04,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:04,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:04,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:04,969 INFO L87 Difference]: Start difference. First operand 356 states and 1058 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:05,560 INFO L93 Difference]: Finished difference Result 727 states and 2073 transitions. [2021-06-05 14:40:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:40:05,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:05,561 INFO L225 Difference]: With dead ends: 727 [2021-06-05 14:40:05,561 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 14:40:05,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 14:40:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 378. [2021-06-05 14:40:05,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.976127320954907) internal successors, (1122), 377 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1122 transitions. [2021-06-05 14:40:05,566 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1122 transitions. Word has length 22 [2021-06-05 14:40:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:05,567 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1122 transitions. [2021-06-05 14:40:05,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1122 transitions. [2021-06-05 14:40:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:05,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:05,567 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1605 [2021-06-05 14:40:05,768 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1482186500, now seen corresponding path program 149 times [2021-06-05 14:40:05,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:05,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167105174] [2021-06-05 14:40:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:05,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167105174] [2021-06-05 14:40:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167105174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953186051] [2021-06-05 14:40:05,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:05,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:05,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:05,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:05,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:06,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953186051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:06,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:06,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:06,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266135868] [2021-06-05 14:40:06,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:06,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:06,101 INFO L87 Difference]: Start difference. First operand 378 states and 1122 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:06,591 INFO L93 Difference]: Finished difference Result 684 states and 1962 transitions. [2021-06-05 14:40:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:40:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:06,592 INFO L225 Difference]: With dead ends: 684 [2021-06-05 14:40:06,592 INFO L226 Difference]: Without dead ends: 669 [2021-06-05 14:40:06,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-05 14:40:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 352. [2021-06-05 14:40:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.988603988603989) internal successors, (1049), 351 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1049 transitions. [2021-06-05 14:40:06,596 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1049 transitions. Word has length 22 [2021-06-05 14:40:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:06,597 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1049 transitions. [2021-06-05 14:40:06,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1049 transitions. [2021-06-05 14:40:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:06,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:06,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:06,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1615,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:06,798 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:06,798 INFO L82 PathProgramCache]: Analyzing trace with hash -400936498, now seen corresponding path program 150 times [2021-06-05 14:40:06,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:06,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028602719] [2021-06-05 14:40:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:06,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:06,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028602719] [2021-06-05 14:40:06,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028602719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:06,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991842629] [2021-06-05 14:40:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:06,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:06,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:06,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991842629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:07,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:07,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264529556] [2021-06-05 14:40:07,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:07,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:07,092 INFO L87 Difference]: Start difference. First operand 352 states and 1049 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:07,486 INFO L93 Difference]: Finished difference Result 665 states and 1917 transitions. [2021-06-05 14:40:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:07,487 INFO L225 Difference]: With dead ends: 665 [2021-06-05 14:40:07,487 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 14:40:07,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:07,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 14:40:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 362. [2021-06-05 14:40:07,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.96398891966759) internal successors, (1070), 361 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1070 transitions. [2021-06-05 14:40:07,491 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1070 transitions. Word has length 22 [2021-06-05 14:40:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:07,491 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1070 transitions. [2021-06-05 14:40:07,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1070 transitions. [2021-06-05 14:40:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:07,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:07,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:07,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-06-05 14:40:07,692 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1124721900, now seen corresponding path program 151 times [2021-06-05 14:40:07,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:07,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676051162] [2021-06-05 14:40:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:07,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676051162] [2021-06-05 14:40:07,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676051162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404445237] [2021-06-05 14:40:07,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:07,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404445237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:07,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:07,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:07,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850774167] [2021-06-05 14:40:07,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:07,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:07,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:07,957 INFO L87 Difference]: Start difference. First operand 362 states and 1070 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:08,305 INFO L93 Difference]: Finished difference Result 609 states and 1767 transitions. [2021-06-05 14:40:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:08,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:08,306 INFO L225 Difference]: With dead ends: 609 [2021-06-05 14:40:08,306 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 14:40:08,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 14:40:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 368. [2021-06-05 14:40:08,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.9509536784741144) internal successors, (1083), 367 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1083 transitions. [2021-06-05 14:40:08,311 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1083 transitions. Word has length 22 [2021-06-05 14:40:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:08,311 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1083 transitions. [2021-06-05 14:40:08,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1083 transitions. [2021-06-05 14:40:08,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:08,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:08,311 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:08,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:08,512 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:08,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:08,512 INFO L82 PathProgramCache]: Analyzing trace with hash -225110476, now seen corresponding path program 152 times [2021-06-05 14:40:08,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:08,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624962543] [2021-06-05 14:40:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:08,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:08,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624962543] [2021-06-05 14:40:08,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624962543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:08,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852762174] [2021-06-05 14:40:08,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:08,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:08,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:08,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:08,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852762174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:08,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:08,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:08,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961204295] [2021-06-05 14:40:08,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:08,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:08,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:08,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:08,815 INFO L87 Difference]: Start difference. First operand 368 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:09,298 INFO L93 Difference]: Finished difference Result 687 states and 1945 transitions. [2021-06-05 14:40:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:09,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:09,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:09,299 INFO L225 Difference]: With dead ends: 687 [2021-06-05 14:40:09,299 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 14:40:09,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 14:40:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-06-05 14:40:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.948586118251928) internal successors, (1147), 389 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1147 transitions. [2021-06-05 14:40:09,304 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1147 transitions. Word has length 22 [2021-06-05 14:40:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:09,304 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1147 transitions. [2021-06-05 14:40:09,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1147 transitions. [2021-06-05 14:40:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:09,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:09,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:09,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:09,505 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -407200788, now seen corresponding path program 153 times [2021-06-05 14:40:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:09,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490448367] [2021-06-05 14:40:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:09,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:09,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490448367] [2021-06-05 14:40:09,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490448367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:09,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117091333] [2021-06-05 14:40:09,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:09,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:09,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:09,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:09,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:09,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117091333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:09,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:09,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:09,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141045131] [2021-06-05 14:40:09,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:09,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:09,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:09,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:09,817 INFO L87 Difference]: Start difference. First operand 390 states and 1147 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:10,147 INFO L93 Difference]: Finished difference Result 644 states and 1834 transitions. [2021-06-05 14:40:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:10,147 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:10,148 INFO L225 Difference]: With dead ends: 644 [2021-06-05 14:40:10,148 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 14:40:10,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 14:40:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 355. [2021-06-05 14:40:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.977401129943503) internal successors, (1054), 354 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1054 transitions. [2021-06-05 14:40:10,153 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1054 transitions. Word has length 22 [2021-06-05 14:40:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:10,153 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1054 transitions. [2021-06-05 14:40:10,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1054 transitions. [2021-06-05 14:40:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:10,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:10,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:10,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-06-05 14:40:10,354 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1187444538, now seen corresponding path program 154 times [2021-06-05 14:40:10,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:10,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779860394] [2021-06-05 14:40:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:10,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:10,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779860394] [2021-06-05 14:40:10,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779860394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:10,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764366184] [2021-06-05 14:40:10,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:10,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:10,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:10,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764366184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:10,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:10,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:10,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153118397] [2021-06-05 14:40:10,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:10,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:10,670 INFO L87 Difference]: Start difference. First operand 355 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:10,959 INFO L93 Difference]: Finished difference Result 643 states and 1857 transitions. [2021-06-05 14:40:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:10,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:10,961 INFO L225 Difference]: With dead ends: 643 [2021-06-05 14:40:10,961 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 14:40:10,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 14:40:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 364. [2021-06-05 14:40:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.9669421487603307) internal successors, (1077), 363 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1077 transitions. [2021-06-05 14:40:10,970 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1077 transitions. Word has length 22 [2021-06-05 14:40:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:10,970 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1077 transitions. [2021-06-05 14:40:10,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1077 transitions. [2021-06-05 14:40:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:10,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:10,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:11,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1665,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:11,187 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash 307158426, now seen corresponding path program 155 times [2021-06-05 14:40:11,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:11,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197228825] [2021-06-05 14:40:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:11,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:11,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197228825] [2021-06-05 14:40:11,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197228825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:11,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937900742] [2021-06-05 14:40:11,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:11,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:11,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:11,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937900742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:11,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:11,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:11,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335148921] [2021-06-05 14:40:11,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:11,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:11,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:11,451 INFO L87 Difference]: Start difference. First operand 364 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:11,986 INFO L93 Difference]: Finished difference Result 666 states and 1909 transitions. [2021-06-05 14:40:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:40:11,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:11,987 INFO L225 Difference]: With dead ends: 666 [2021-06-05 14:40:11,987 INFO L226 Difference]: Without dead ends: 656 [2021-06-05 14:40:11,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:40:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-05 14:40:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 361. [2021-06-05 14:40:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9583333333333335) internal successors, (1065), 360 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1065 transitions. [2021-06-05 14:40:11,991 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1065 transitions. Word has length 22 [2021-06-05 14:40:11,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:11,992 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1065 transitions. [2021-06-05 14:40:11,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1065 transitions. [2021-06-05 14:40:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:11,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:11,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:12,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-05 14:40:12,193 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash 732105636, now seen corresponding path program 156 times [2021-06-05 14:40:12,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:12,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310949000] [2021-06-05 14:40:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:12,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310949000] [2021-06-05 14:40:12,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310949000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119151811] [2021-06-05 14:40:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:12,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:12,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:12,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:12,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119151811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:12,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:12,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:12,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380139998] [2021-06-05 14:40:12,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:12,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:12,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:12,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:12,445 INFO L87 Difference]: Start difference. First operand 361 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:12,781 INFO L93 Difference]: Finished difference Result 652 states and 1887 transitions. [2021-06-05 14:40:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:40:12,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:12,782 INFO L225 Difference]: With dead ends: 652 [2021-06-05 14:40:12,782 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 14:40:12,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 14:40:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 358. [2021-06-05 14:40:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.9495798319327733) internal successors, (1053), 357 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1053 transitions. [2021-06-05 14:40:12,786 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1053 transitions. Word has length 22 [2021-06-05 14:40:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:12,786 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1053 transitions. [2021-06-05 14:40:12,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1053 transitions. [2021-06-05 14:40:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:12,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:12,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:12,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1676 [2021-06-05 14:40:12,988 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:12,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1791265100, now seen corresponding path program 157 times [2021-06-05 14:40:12,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:12,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731002075] [2021-06-05 14:40:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731002075] [2021-06-05 14:40:13,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731002075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198460938] [2021-06-05 14:40:13,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198460938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:13,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:13,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136276164] [2021-06-05 14:40:13,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:13,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:13,231 INFO L87 Difference]: Start difference. First operand 358 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,493 INFO L93 Difference]: Finished difference Result 580 states and 1679 transitions. [2021-06-05 14:40:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,494 INFO L225 Difference]: With dead ends: 580 [2021-06-05 14:40:13,494 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:40:13,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:40:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 332. [2021-06-05 14:40:13,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9486404833836857) internal successors, (976), 331 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 976 transitions. [2021-06-05 14:40:13,500 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 976 transitions. Word has length 22 [2021-06-05 14:40:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,500 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 976 transitions. [2021-06-05 14:40:13,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 976 transitions. [2021-06-05 14:40:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:13,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,501 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:13,724 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,724 INFO L82 PathProgramCache]: Analyzing trace with hash 833708592, now seen corresponding path program 158 times [2021-06-05 14:40:13,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618000058] [2021-06-05 14:40:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618000058] [2021-06-05 14:40:13,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618000058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014523168] [2021-06-05 14:40:13,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:13,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:13,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:14,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014523168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:14,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:14,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:14,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662193594] [2021-06-05 14:40:14,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:14,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:14,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:14,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:14,038 INFO L87 Difference]: Start difference. First operand 332 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:14,286 INFO L93 Difference]: Finished difference Result 529 states and 1547 transitions. [2021-06-05 14:40:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:14,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:14,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:14,287 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:40:14,287 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 14:40:14,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 14:40:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 341. [2021-06-05 14:40:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9676470588235295) internal successors, (1009), 340 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1009 transitions. [2021-06-05 14:40:14,293 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1009 transitions. Word has length 22 [2021-06-05 14:40:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:14,294 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1009 transitions. [2021-06-05 14:40:14,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1009 transitions. [2021-06-05 14:40:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:14,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:14,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:14,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-06-05 14:40:14,501 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1966655740, now seen corresponding path program 159 times [2021-06-05 14:40:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872203369] [2021-06-05 14:40:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:14,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:14,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872203369] [2021-06-05 14:40:14,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872203369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:14,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250818613] [2021-06-05 14:40:14,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:14,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:14,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:14,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:14,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:14,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250818613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:14,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:14,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:14,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220983320] [2021-06-05 14:40:14,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:14,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:14,756 INFO L87 Difference]: Start difference. First operand 341 states and 1009 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:15,030 INFO L93 Difference]: Finished difference Result 560 states and 1626 transitions. [2021-06-05 14:40:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:15,031 INFO L225 Difference]: With dead ends: 560 [2021-06-05 14:40:15,031 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:40:15,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:40:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2021-06-05 14:40:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9584569732937687) internal successors, (997), 337 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 997 transitions. [2021-06-05 14:40:15,035 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 997 transitions. Word has length 22 [2021-06-05 14:40:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:15,035 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 997 transitions. [2021-06-05 14:40:15,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 997 transitions. [2021-06-05 14:40:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:15,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:15,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:15,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-06-05 14:40:15,236 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:15,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1541708530, now seen corresponding path program 160 times [2021-06-05 14:40:15,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:15,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262021881] [2021-06-05 14:40:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262021881] [2021-06-05 14:40:15,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262021881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455218327] [2021-06-05 14:40:15,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:15,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:15,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:15,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455218327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:15,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353997207] [2021-06-05 14:40:15,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:15,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:15,486 INFO L87 Difference]: Start difference. First operand 338 states and 997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:15,721 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-06-05 14:40:15,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:15,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:15,722 INFO L225 Difference]: With dead ends: 511 [2021-06-05 14:40:15,722 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:40:15,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:40:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 335. [2021-06-05 14:40:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9491017964071857) internal successors, (985), 334 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 985 transitions. [2021-06-05 14:40:15,726 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 985 transitions. Word has length 22 [2021-06-05 14:40:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:15,726 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 985 transitions. [2021-06-05 14:40:15,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 985 transitions. [2021-06-05 14:40:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:15,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:15,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:15,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1695,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:15,927 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1380787108, now seen corresponding path program 161 times [2021-06-05 14:40:15,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:15,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52436339] [2021-06-05 14:40:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:15,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:15,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52436339] [2021-06-05 14:40:15,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52436339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:15,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061350977] [2021-06-05 14:40:15,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:16,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:16,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:16,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:16,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061350977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:16,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:16,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362032523] [2021-06-05 14:40:16,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:16,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:16,230 INFO L87 Difference]: Start difference. First operand 335 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:16,488 INFO L93 Difference]: Finished difference Result 621 states and 1797 transitions. [2021-06-05 14:40:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:16,489 INFO L225 Difference]: With dead ends: 621 [2021-06-05 14:40:16,490 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 14:40:16,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 14:40:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 347. [2021-06-05 14:40:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.985549132947977) internal successors, (1033), 346 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1033 transitions. [2021-06-05 14:40:16,494 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1033 transitions. Word has length 22 [2021-06-05 14:40:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:16,494 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1033 transitions. [2021-06-05 14:40:16,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1033 transitions. [2021-06-05 14:40:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:16,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:16,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:16,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 14:40:16,695 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash 113815856, now seen corresponding path program 162 times [2021-06-05 14:40:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:16,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273660971] [2021-06-05 14:40:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:16,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273660971] [2021-06-05 14:40:16,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273660971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507469408] [2021-06-05 14:40:16,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:16,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:16,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507469408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:16,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:16,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816837478] [2021-06-05 14:40:16,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:16,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:16,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:16,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:16,947 INFO L87 Difference]: Start difference. First operand 347 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:17,279 INFO L93 Difference]: Finished difference Result 584 states and 1702 transitions. [2021-06-05 14:40:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:17,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:17,280 INFO L225 Difference]: With dead ends: 584 [2021-06-05 14:40:17,280 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 14:40:17,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 14:40:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 354. [2021-06-05 14:40:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9660056657223794) internal successors, (1047), 353 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1047 transitions. [2021-06-05 14:40:17,285 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1047 transitions. Word has length 22 [2021-06-05 14:40:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:17,285 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1047 transitions. [2021-06-05 14:40:17,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1047 transitions. [2021-06-05 14:40:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:17,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:17,286 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:17,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-06-05 14:40:17,503 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:17,503 INFO L82 PathProgramCache]: Analyzing trace with hash -205296464, now seen corresponding path program 163 times [2021-06-05 14:40:17,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:17,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905633106] [2021-06-05 14:40:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:17,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:17,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905633106] [2021-06-05 14:40:17,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905633106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:17,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072447007] [2021-06-05 14:40:17,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:17,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:17,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072447007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:17,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:17,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:17,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679924527] [2021-06-05 14:40:17,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:17,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:17,760 INFO L87 Difference]: Start difference. First operand 354 states and 1047 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:17,935 INFO L93 Difference]: Finished difference Result 488 states and 1444 transitions. [2021-06-05 14:40:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:17,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:17,936 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:40:17,936 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:40:17,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:17,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:40:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-06-05 14:40:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-05 14:40:17,939 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-05 14:40:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:17,940 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-05 14:40:17,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-05 14:40:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:17,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:17,940 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:18,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-05 14:40:18,141 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1399002178, now seen corresponding path program 164 times [2021-06-05 14:40:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006734639] [2021-06-05 14:40:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:18,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006734639] [2021-06-05 14:40:18,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006734639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621801516] [2021-06-05 14:40:18,208 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:18,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:18,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621801516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:18,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:18,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266796600] [2021-06-05 14:40:18,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:18,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:18,432 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:18,721 INFO L93 Difference]: Finished difference Result 508 states and 1483 transitions. [2021-06-05 14:40:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:18,722 INFO L225 Difference]: With dead ends: 508 [2021-06-05 14:40:18,722 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:40:18,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:40:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 336. [2021-06-05 14:40:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.97910447761194) internal successors, (998), 335 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 998 transitions. [2021-06-05 14:40:18,728 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 998 transitions. Word has length 22 [2021-06-05 14:40:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:18,728 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 998 transitions. [2021-06-05 14:40:18,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 998 transitions. [2021-06-05 14:40:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:18,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:18,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:18,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:18,952 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:18,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1401362154, now seen corresponding path program 165 times [2021-06-05 14:40:18,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:18,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459628642] [2021-06-05 14:40:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:19,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459628642] [2021-06-05 14:40:19,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459628642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354744333] [2021-06-05 14:40:19,026 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:19,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354744333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:19,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670944280] [2021-06-05 14:40:19,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:19,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:19,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:19,256 INFO L87 Difference]: Start difference. First operand 336 states and 998 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:19,591 INFO L93 Difference]: Finished difference Result 539 states and 1562 transitions. [2021-06-05 14:40:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:19,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:19,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:19,592 INFO L225 Difference]: With dead ends: 539 [2021-06-05 14:40:19,592 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 14:40:19,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 14:40:19,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 333. [2021-06-05 14:40:19,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9698795180722892) internal successors, (986), 332 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 986 transitions. [2021-06-05 14:40:19,596 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 986 transitions. Word has length 22 [2021-06-05 14:40:19,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:19,596 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 986 transitions. [2021-06-05 14:40:19,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,596 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 986 transitions. [2021-06-05 14:40:19,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:19,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:19,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:19,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1721 [2021-06-05 14:40:19,797 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:19,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:19,797 INFO L82 PathProgramCache]: Analyzing trace with hash -976414944, now seen corresponding path program 166 times [2021-06-05 14:40:19,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:19,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632354646] [2021-06-05 14:40:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:19,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632354646] [2021-06-05 14:40:19,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632354646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582618185] [2021-06-05 14:40:19,858 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:19,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:19,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582618185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:20,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:20,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166270842] [2021-06-05 14:40:20,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:20,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:20,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:20,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:20,107 INFO L87 Difference]: Start difference. First operand 333 states and 986 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:20,375 INFO L93 Difference]: Finished difference Result 500 states and 1460 transitions. [2021-06-05 14:40:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:20,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:20,376 INFO L225 Difference]: With dead ends: 500 [2021-06-05 14:40:20,376 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:40:20,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:40:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 330. [2021-06-05 14:40:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9604863221884496) internal successors, (974), 329 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 974 transitions. [2021-06-05 14:40:20,380 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 974 transitions. Word has length 22 [2021-06-05 14:40:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:20,380 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 974 transitions. [2021-06-05 14:40:20,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 974 transitions. [2021-06-05 14:40:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:20,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:20,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:20,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1730,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,581 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1791095814, now seen corresponding path program 167 times [2021-06-05 14:40:20,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:20,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416892191] [2021-06-05 14:40:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416892191] [2021-06-05 14:40:20,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416892191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937607306] [2021-06-05 14:40:20,664 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:20,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937607306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:20,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:20,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152534204] [2021-06-05 14:40:20,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:20,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:20,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:20,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:20,913 INFO L87 Difference]: Start difference. First operand 330 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:21,271 INFO L93 Difference]: Finished difference Result 626 states and 1819 transitions. [2021-06-05 14:40:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:21,272 INFO L225 Difference]: With dead ends: 626 [2021-06-05 14:40:21,272 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 14:40:21,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 14:40:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 340. [2021-06-05 14:40:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0117994100294987) internal successors, (1021), 339 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1021 transitions. [2021-06-05 14:40:21,276 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1021 transitions. Word has length 22 [2021-06-05 14:40:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:21,276 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1021 transitions. [2021-06-05 14:40:21,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1021 transitions. [2021-06-05 14:40:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:21,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:21,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:21,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:21,477 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash -296492850, now seen corresponding path program 168 times [2021-06-05 14:40:21,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:21,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150549151] [2021-06-05 14:40:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:21,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:21,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150549151] [2021-06-05 14:40:21,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150549151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:21,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581616716] [2021-06-05 14:40:21,543 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:21,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:21,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:21,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581616716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:21,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:21,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:21,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708761004] [2021-06-05 14:40:21,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:21,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:21,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:21,782 INFO L87 Difference]: Start difference. First operand 340 states and 1021 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:22,202 INFO L93 Difference]: Finished difference Result 668 states and 1921 transitions. [2021-06-05 14:40:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:40:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:22,203 INFO L225 Difference]: With dead ends: 668 [2021-06-05 14:40:22,203 INFO L226 Difference]: Without dead ends: 658 [2021-06-05 14:40:22,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-05 14:40:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 347. [2021-06-05 14:40:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.991329479768786) internal successors, (1035), 346 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1035 transitions. [2021-06-05 14:40:22,207 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1035 transitions. Word has length 22 [2021-06-05 14:40:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:22,208 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1035 transitions. [2021-06-05 14:40:22,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1035 transitions. [2021-06-05 14:40:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:22,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:22,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:22,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-05 14:40:22,409 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1154039106, now seen corresponding path program 169 times [2021-06-05 14:40:22,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:22,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124903965] [2021-06-05 14:40:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:22,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:22,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124903965] [2021-06-05 14:40:22,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124903965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:22,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859875857] [2021-06-05 14:40:22,505 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:22,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:22,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:22,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859875857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:22,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:22,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:22,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926659190] [2021-06-05 14:40:22,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:22,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:22,745 INFO L87 Difference]: Start difference. First operand 347 states and 1035 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:22,963 INFO L93 Difference]: Finished difference Result 559 states and 1628 transitions. [2021-06-05 14:40:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:22,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:22,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:22,964 INFO L225 Difference]: With dead ends: 559 [2021-06-05 14:40:22,964 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 14:40:22,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 14:40:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 338. [2021-06-05 14:40:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-06-05 14:40:22,968 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 22 [2021-06-05 14:40:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:22,968 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-06-05 14:40:22,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-06-05 14:40:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:22,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:22,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:23,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-05 14:40:23,169 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash -357980338, now seen corresponding path program 170 times [2021-06-05 14:40:23,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:23,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525742387] [2021-06-05 14:40:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:23,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:23,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525742387] [2021-06-05 14:40:23,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525742387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:23,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917996080] [2021-06-05 14:40:23,238 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:23,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:23,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:23,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917996080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:23,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:23,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:23,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83451854] [2021-06-05 14:40:23,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:23,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:23,449 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:23,670 INFO L93 Difference]: Finished difference Result 550 states and 1580 transitions. [2021-06-05 14:40:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:23,671 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:40:23,671 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 14:40:23,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 14:40:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 344. [2021-06-05 14:40:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.979591836734694) internal successors, (1022), 343 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1022 transitions. [2021-06-05 14:40:23,675 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1022 transitions. Word has length 22 [2021-06-05 14:40:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:23,675 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1022 transitions. [2021-06-05 14:40:23,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1022 transitions. [2021-06-05 14:40:23,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:23,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:23,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:23,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:23,876 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash -580540704, now seen corresponding path program 171 times [2021-06-05 14:40:23,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:23,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201034718] [2021-06-05 14:40:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:23,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201034718] [2021-06-05 14:40:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201034718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874470255] [2021-06-05 14:40:23,942 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:40:24,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:24,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:24,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874470255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:24,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:24,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795016140] [2021-06-05 14:40:24,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:24,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:24,150 INFO L87 Difference]: Start difference. First operand 344 states and 1022 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:24,553 INFO L93 Difference]: Finished difference Result 617 states and 1746 transitions. [2021-06-05 14:40:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:24,554 INFO L225 Difference]: With dead ends: 617 [2021-06-05 14:40:24,554 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:40:24,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:40:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 366. [2021-06-05 14:40:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9753424657534246) internal successors, (1086), 365 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1086 transitions. [2021-06-05 14:40:24,559 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1086 transitions. Word has length 22 [2021-06-05 14:40:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:24,559 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1086 transitions. [2021-06-05 14:40:24,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1086 transitions. [2021-06-05 14:40:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:24,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:24,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:24,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-06-05 14:40:24,760 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:24,760 INFO L82 PathProgramCache]: Analyzing trace with hash -762631016, now seen corresponding path program 172 times [2021-06-05 14:40:24,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:24,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484371989] [2021-06-05 14:40:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:24,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484371989] [2021-06-05 14:40:24,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484371989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086431654] [2021-06-05 14:40:24,824 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:24,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:25,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086431654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:25,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:25,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:25,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547596954] [2021-06-05 14:40:25,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:25,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:25,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:25,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:25,042 INFO L87 Difference]: Start difference. First operand 366 states and 1086 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:25,380 INFO L93 Difference]: Finished difference Result 607 states and 1707 transitions. [2021-06-05 14:40:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:25,381 INFO L225 Difference]: With dead ends: 607 [2021-06-05 14:40:25,381 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 14:40:25,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 14:40:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 346. [2021-06-05 14:40:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.973913043478261) internal successors, (1026), 345 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1026 transitions. [2021-06-05 14:40:25,385 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1026 transitions. Word has length 22 [2021-06-05 14:40:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:25,385 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1026 transitions. [2021-06-05 14:40:25,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1026 transitions. [2021-06-05 14:40:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:25,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:25,386 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:25,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-06-05 14:40:25,586 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1191963826, now seen corresponding path program 173 times [2021-06-05 14:40:25,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:25,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083317980] [2021-06-05 14:40:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:25,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:25,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083317980] [2021-06-05 14:40:25,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083317980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:25,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625176286] [2021-06-05 14:40:25,644 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:25,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:25,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:25,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:25,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625176286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:25,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:25,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661795816] [2021-06-05 14:40:25,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:25,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:25,866 INFO L87 Difference]: Start difference. First operand 346 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:26,233 INFO L93 Difference]: Finished difference Result 475 states and 1390 transitions. [2021-06-05 14:40:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:26,234 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:40:26,234 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 14:40:26,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 14:40:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 352. [2021-06-05 14:40:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.96011396011396) internal successors, (1039), 351 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1039 transitions. [2021-06-05 14:40:26,238 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1039 transitions. Word has length 22 [2021-06-05 14:40:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:26,238 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1039 transitions. [2021-06-05 14:40:26,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1039 transitions. [2021-06-05 14:40:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:26,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:26,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:26,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-05 14:40:26,439 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1753171094, now seen corresponding path program 174 times [2021-06-05 14:40:26,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:26,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792576773] [2021-06-05 14:40:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:26,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:26,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792576773] [2021-06-05 14:40:26,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792576773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:26,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766845004] [2021-06-05 14:40:26,502 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:26,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:26,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:26,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766845004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:26,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:26,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:26,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33710723] [2021-06-05 14:40:26,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:26,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:26,767 INFO L87 Difference]: Start difference. First operand 352 states and 1039 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:27,176 INFO L93 Difference]: Finished difference Result 553 states and 1568 transitions. [2021-06-05 14:40:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:27,177 INFO L225 Difference]: With dead ends: 553 [2021-06-05 14:40:27,177 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 14:40:27,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:40:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 14:40:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 374. [2021-06-05 14:40:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.9571045576407506) internal successors, (1103), 373 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1103 transitions. [2021-06-05 14:40:27,181 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1103 transitions. Word has length 22 [2021-06-05 14:40:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:27,181 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1103 transitions. [2021-06-05 14:40:27,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1103 transitions. [2021-06-05 14:40:27,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:27,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:27,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:27,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:27,385 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:27,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:27,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080782, now seen corresponding path program 175 times [2021-06-05 14:40:27,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:27,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823797791] [2021-06-05 14:40:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:27,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:27,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823797791] [2021-06-05 14:40:27,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823797791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:27,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343865140] [2021-06-05 14:40:27,447 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:27,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343865140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:27,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:27,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:27,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294360943] [2021-06-05 14:40:27,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:27,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:27,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:27,709 INFO L87 Difference]: Start difference. First operand 374 states and 1103 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:27,990 INFO L93 Difference]: Finished difference Result 510 states and 1457 transitions. [2021-06-05 14:40:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:27,991 INFO L225 Difference]: With dead ends: 510 [2021-06-05 14:40:27,991 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 14:40:27,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 14:40:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 348. [2021-06-05 14:40:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.968299711815562) internal successors, (1030), 347 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1030 transitions. [2021-06-05 14:40:27,996 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1030 transitions. Word has length 22 [2021-06-05 14:40:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:27,996 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1030 transitions. [2021-06-05 14:40:27,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1030 transitions. [2021-06-05 14:40:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:27,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:27,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:28,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1827,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:28,201 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 861509322, now seen corresponding path program 176 times [2021-06-05 14:40:28,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:28,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008315836] [2021-06-05 14:40:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:28,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:28,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008315836] [2021-06-05 14:40:28,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008315836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:28,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706654062] [2021-06-05 14:40:28,267 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:28,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:28,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:28,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:28,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706654062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:28,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:28,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:28,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378083714] [2021-06-05 14:40:28,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:28,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:28,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:28,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:28,470 INFO L87 Difference]: Start difference. First operand 348 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:28,678 INFO L93 Difference]: Finished difference Result 491 states and 1418 transitions. [2021-06-05 14:40:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:28,679 INFO L225 Difference]: With dead ends: 491 [2021-06-05 14:40:28,679 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:40:28,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:40:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 351. [2021-06-05 14:40:28,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.954285714285714) internal successors, (1034), 350 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1034 transitions. [2021-06-05 14:40:28,683 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1034 transitions. Word has length 22 [2021-06-05 14:40:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:28,683 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1034 transitions. [2021-06-05 14:40:28,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1034 transitions. [2021-06-05 14:40:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:28,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:28,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:28,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1838,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:28,884 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1938855010, now seen corresponding path program 177 times [2021-06-05 14:40:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:28,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069299427] [2021-06-05 14:40:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:28,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:28,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069299427] [2021-06-05 14:40:28,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069299427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:28,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356257791] [2021-06-05 14:40:28,951 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:29,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:29,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:29,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:29,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356257791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:29,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:29,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:29,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779368303] [2021-06-05 14:40:29,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:29,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:29,157 INFO L87 Difference]: Start difference. First operand 351 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:29,418 INFO L93 Difference]: Finished difference Result 522 states and 1494 transitions. [2021-06-05 14:40:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:29,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:29,419 INFO L225 Difference]: With dead ends: 522 [2021-06-05 14:40:29,419 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 14:40:29,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 14:40:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 348. [2021-06-05 14:40:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9452449567723344) internal successors, (1022), 347 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1022 transitions. [2021-06-05 14:40:29,423 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1022 transitions. Word has length 22 [2021-06-05 14:40:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:29,423 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1022 transitions. [2021-06-05 14:40:29,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1022 transitions. [2021-06-05 14:40:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:29,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:29,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:29,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1843,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:29,624 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:29,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1513907800, now seen corresponding path program 178 times [2021-06-05 14:40:29,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:29,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727807371] [2021-06-05 14:40:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:29,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727807371] [2021-06-05 14:40:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727807371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:29,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478713408] [2021-06-05 14:40:29,691 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:29,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:29,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:29,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478713408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:29,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:29,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:29,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410184597] [2021-06-05 14:40:29,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:29,896 INFO L87 Difference]: Start difference. First operand 348 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:30,123 INFO L93 Difference]: Finished difference Result 473 states and 1378 transitions. [2021-06-05 14:40:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:30,124 INFO L225 Difference]: With dead ends: 473 [2021-06-05 14:40:30,124 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 14:40:30,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 14:40:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 330. [2021-06-05 14:40:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9483282674772036) internal successors, (970), 329 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 970 transitions. [2021-06-05 14:40:30,128 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 970 transitions. Word has length 22 [2021-06-05 14:40:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:30,128 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 970 transitions. [2021-06-05 14:40:30,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,128 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 970 transitions. [2021-06-05 14:40:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:30,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:30,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:30,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:30,329 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash 193085434, now seen corresponding path program 179 times [2021-06-05 14:40:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:30,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611481362] [2021-06-05 14:40:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:30,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:30,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611481362] [2021-06-05 14:40:30,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611481362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:30,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675725591] [2021-06-05 14:40:30,403 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:30,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:30,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:30,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:30,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675725591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:30,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:30,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:30,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829214794] [2021-06-05 14:40:30,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:30,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:30,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:30,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:30,605 INFO L87 Difference]: Start difference. First operand 330 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:30,802 INFO L93 Difference]: Finished difference Result 550 states and 1602 transitions. [2021-06-05 14:40:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:30,803 INFO L225 Difference]: With dead ends: 550 [2021-06-05 14:40:30,803 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 14:40:30,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:30,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 14:40:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-06-05 14:40:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-05 14:40:30,807 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 22 [2021-06-05 14:40:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:30,807 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-05 14:40:30,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-05 14:40:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:30,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:30,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:31,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1852 [2021-06-05 14:40:31,008 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:31,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1687688398, now seen corresponding path program 180 times [2021-06-05 14:40:31,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:31,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310725157] [2021-06-05 14:40:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:31,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310725157] [2021-06-05 14:40:31,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310725157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202675943] [2021-06-05 14:40:31,074 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:31,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202675943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:31,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:31,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365573155] [2021-06-05 14:40:31,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:31,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:31,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:31,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:31,278 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:31,628 INFO L93 Difference]: Finished difference Result 542 states and 1576 transitions. [2021-06-05 14:40:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:31,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:31,629 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:40:31,629 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 14:40:31,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 14:40:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 349. [2021-06-05 14:40:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2021-06-05 14:40:31,633 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2021-06-05 14:40:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:31,633 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2021-06-05 14:40:31,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2021-06-05 14:40:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:31,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:31,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:31,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1857,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:31,834 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1368576078, now seen corresponding path program 181 times [2021-06-05 14:40:31,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:31,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323631500] [2021-06-05 14:40:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:31,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:31,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323631500] [2021-06-05 14:40:31,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323631500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:31,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067671726] [2021-06-05 14:40:31,903 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:31,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:32,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067671726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:32,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:32,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:32,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649706513] [2021-06-05 14:40:32,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:32,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:32,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:32,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:32,097 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:32,285 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-06-05 14:40:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:32,286 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:32,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:32,286 INFO L225 Difference]: With dead ends: 450 [2021-06-05 14:40:32,286 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 14:40:32,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:40:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 14:40:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 327. [2021-06-05 14:40:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9478527607361964) internal successors, (961), 326 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 961 transitions. [2021-06-05 14:40:32,290 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 961 transitions. Word has length 22 [2021-06-05 14:40:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:32,290 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 961 transitions. [2021-06-05 14:40:32,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 961 transitions. [2021-06-05 14:40:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:32,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:32,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:32,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-06-05 14:40:32,491 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:32,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1160139342, now seen corresponding path program 182 times [2021-06-05 14:40:32,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:32,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891096472] [2021-06-05 14:40:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:32,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:32,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891096472] [2021-06-05 14:40:32,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891096472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:32,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778245559] [2021-06-05 14:40:32,576 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:32,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:32,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:32,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:32,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778245559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:32,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:32,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:32,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959023673] [2021-06-05 14:40:32,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:32,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:32,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:32,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:32,869 INFO L87 Difference]: Start difference. First operand 327 states and 961 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:33,181 INFO L93 Difference]: Finished difference Result 707 states and 2023 transitions. [2021-06-05 14:40:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:40:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:33,182 INFO L225 Difference]: With dead ends: 707 [2021-06-05 14:40:33,182 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 14:40:33,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 14:40:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 341. [2021-06-05 14:40:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.011764705882353) internal successors, (1024), 340 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1024 transitions. [2021-06-05 14:40:33,187 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1024 transitions. Word has length 22 [2021-06-05 14:40:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:33,187 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1024 transitions. [2021-06-05 14:40:33,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1024 transitions. [2021-06-05 14:40:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:33,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:33,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:33,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:33,388 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1640224990, now seen corresponding path program 183 times [2021-06-05 14:40:33,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:33,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624383219] [2021-06-05 14:40:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:33,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624383219] [2021-06-05 14:40:33,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624383219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738982489] [2021-06-05 14:40:33,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:33,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:33,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:33,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738982489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:33,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:33,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:33,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796411718] [2021-06-05 14:40:33,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:33,697 INFO L87 Difference]: Start difference. First operand 341 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:33,924 INFO L93 Difference]: Finished difference Result 650 states and 1868 transitions. [2021-06-05 14:40:33,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:33,925 INFO L225 Difference]: With dead ends: 650 [2021-06-05 14:40:33,925 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 14:40:33,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 14:40:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-06-05 14:40:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9913544668587897) internal successors, (1038), 347 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1038 transitions. [2021-06-05 14:40:33,930 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1038 transitions. Word has length 22 [2021-06-05 14:40:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:33,930 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1038 transitions. [2021-06-05 14:40:33,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1038 transitions. [2021-06-05 14:40:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:33,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:33,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:34,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1877 [2021-06-05 14:40:34,131 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:34,131 INFO L82 PathProgramCache]: Analyzing trace with hash -189693034, now seen corresponding path program 184 times [2021-06-05 14:40:34,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:34,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337189255] [2021-06-05 14:40:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:34,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:34,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337189255] [2021-06-05 14:40:34,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337189255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:34,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905757161] [2021-06-05 14:40:34,203 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:34,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:34,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:34,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:34,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:34,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905757161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:34,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:34,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:34,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619080107] [2021-06-05 14:40:34,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:34,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:34,466 INFO L87 Difference]: Start difference. First operand 348 states and 1038 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:34,648 INFO L93 Difference]: Finished difference Result 640 states and 1865 transitions. [2021-06-05 14:40:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:34,649 INFO L225 Difference]: With dead ends: 640 [2021-06-05 14:40:34,649 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 14:40:34,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 14:40:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 354. [2021-06-05 14:40:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0169971671388103) internal successors, (1065), 353 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1065 transitions. [2021-06-05 14:40:34,653 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1065 transitions. Word has length 22 [2021-06-05 14:40:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:34,653 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1065 transitions. [2021-06-05 14:40:34,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:34,654 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1065 transitions. [2021-06-05 14:40:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:34,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:34,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:34,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:34,854 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1701712478, now seen corresponding path program 185 times [2021-06-05 14:40:34,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:34,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061209518] [2021-06-05 14:40:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:34,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:34,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061209518] [2021-06-05 14:40:34,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061209518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:34,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723177681] [2021-06-05 14:40:34,925 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:35,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:35,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:35,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:35,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723177681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:35,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:35,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671426785] [2021-06-05 14:40:35,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:35,155 INFO L87 Difference]: Start difference. First operand 354 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:35,453 INFO L93 Difference]: Finished difference Result 631 states and 1817 transitions. [2021-06-05 14:40:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:35,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:35,454 INFO L225 Difference]: With dead ends: 631 [2021-06-05 14:40:35,454 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 14:40:35,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 14:40:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 360. [2021-06-05 14:40:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2021-06-05 14:40:35,458 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 22 [2021-06-05 14:40:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:35,458 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2021-06-05 14:40:35,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2021-06-05 14:40:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:35,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:35,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:35,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1898,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,659 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:35,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1924272844, now seen corresponding path program 186 times [2021-06-05 14:40:35,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:35,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473459538] [2021-06-05 14:40:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:35,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:35,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473459538] [2021-06-05 14:40:35,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473459538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:35,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2736605] [2021-06-05 14:40:35,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:35,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:35,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:35,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:35,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2736605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:35,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:35,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:35,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748533515] [2021-06-05 14:40:35,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:35,957 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:36,287 INFO L93 Difference]: Finished difference Result 593 states and 1708 transitions. [2021-06-05 14:40:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:36,289 INFO L225 Difference]: With dead ends: 593 [2021-06-05 14:40:36,289 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 14:40:36,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 14:40:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 372. [2021-06-05 14:40:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0053908355795147) internal successors, (1115), 371 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1115 transitions. [2021-06-05 14:40:36,294 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1115 transitions. Word has length 22 [2021-06-05 14:40:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:36,294 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1115 transitions. [2021-06-05 14:40:36,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:36,295 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1115 transitions. [2021-06-05 14:40:36,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:36,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:36,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:36,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:36,501 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2106363156, now seen corresponding path program 187 times [2021-06-05 14:40:36,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:36,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009967935] [2021-06-05 14:40:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009967935] [2021-06-05 14:40:36,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009967935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696946045] [2021-06-05 14:40:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:36,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:36,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696946045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:36,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:36,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931238586] [2021-06-05 14:40:36,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:36,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:36,792 INFO L87 Difference]: Start difference. First operand 372 states and 1115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:37,080 INFO L93 Difference]: Finished difference Result 624 states and 1771 transitions. [2021-06-05 14:40:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:37,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:37,081 INFO L225 Difference]: With dead ends: 624 [2021-06-05 14:40:37,081 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 14:40:37,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 14:40:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 368. [2021-06-05 14:40:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.005449591280654) internal successors, (1103), 367 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1103 transitions. [2021-06-05 14:40:37,085 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1103 transitions. Word has length 22 [2021-06-05 14:40:37,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:37,085 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1103 transitions. [2021-06-05 14:40:37,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,085 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1103 transitions. [2021-06-05 14:40:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:37,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:37,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:37,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1925,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:37,286 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash 311516870, now seen corresponding path program 188 times [2021-06-05 14:40:37,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:37,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468313436] [2021-06-05 14:40:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:37,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468313436] [2021-06-05 14:40:37,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468313436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935117060] [2021-06-05 14:40:37,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:37,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:37,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:37,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:37,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935117060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:37,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:37,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088393332] [2021-06-05 14:40:37,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:37,585 INFO L87 Difference]: Start difference. First operand 368 states and 1103 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:37,848 INFO L93 Difference]: Finished difference Result 590 states and 1715 transitions. [2021-06-05 14:40:37,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:40:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:37,849 INFO L225 Difference]: With dead ends: 590 [2021-06-05 14:40:37,849 INFO L226 Difference]: Without dead ends: 590 [2021-06-05 14:40:37,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-05 14:40:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 373. [2021-06-05 14:40:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0) internal successors, (1116), 372 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1116 transitions. [2021-06-05 14:40:37,853 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1116 transitions. Word has length 22 [2021-06-05 14:40:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:37,854 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1116 transitions. [2021-06-05 14:40:37,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1116 transitions. [2021-06-05 14:40:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:37,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:37,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:38,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1936 [2021-06-05 14:40:38,055 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1806119834, now seen corresponding path program 189 times [2021-06-05 14:40:38,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:38,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373494229] [2021-06-05 14:40:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:38,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:38,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373494229] [2021-06-05 14:40:38,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373494229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:38,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195551108] [2021-06-05 14:40:38,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:38,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:38,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:38,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195551108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:38,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:38,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:38,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101416572] [2021-06-05 14:40:38,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:38,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:38,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:38,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:38,345 INFO L87 Difference]: Start difference. First operand 373 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:38,598 INFO L93 Difference]: Finished difference Result 566 states and 1650 transitions. [2021-06-05 14:40:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:38,599 INFO L225 Difference]: With dead ends: 566 [2021-06-05 14:40:38,599 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 14:40:38,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 14:40:38,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 352. [2021-06-05 14:40:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9715099715099713) internal successors, (1043), 351 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1043 transitions. [2021-06-05 14:40:38,603 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1043 transitions. Word has length 22 [2021-06-05 14:40:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:38,603 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1043 transitions. [2021-06-05 14:40:38,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1043 transitions. [2021-06-05 14:40:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:38,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:38,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:38,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:38,805 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1259786134, now seen corresponding path program 190 times [2021-06-05 14:40:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056520260] [2021-06-05 14:40:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:38,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:38,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056520260] [2021-06-05 14:40:38,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056520260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:38,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206657065] [2021-06-05 14:40:38,900 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:39,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:39,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:39,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206657065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:39,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:39,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:39,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251412409] [2021-06-05 14:40:39,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:39,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:39,135 INFO L87 Difference]: Start difference. First operand 352 states and 1043 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:39,350 INFO L93 Difference]: Finished difference Result 495 states and 1468 transitions. [2021-06-05 14:40:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:39,351 INFO L225 Difference]: With dead ends: 495 [2021-06-05 14:40:39,351 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 14:40:39,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 14:40:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 349. [2021-06-05 14:40:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-05 14:40:39,355 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-05 14:40:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:39,355 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-05 14:40:39,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-05 14:40:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:39,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:39,355 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:39,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:39,556 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:39,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1983718082, now seen corresponding path program 191 times [2021-06-05 14:40:39,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:39,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399868048] [2021-06-05 14:40:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:39,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:39,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399868048] [2021-06-05 14:40:39,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399868048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:39,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989229017] [2021-06-05 14:40:39,637 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:39,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:39,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:39,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:39,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989229017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:39,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:39,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:39,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175168214] [2021-06-05 14:40:39,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:39,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:39,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:39,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:39,880 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:40,107 INFO L93 Difference]: Finished difference Result 544 states and 1562 transitions. [2021-06-05 14:40:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:40,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:40,108 INFO L225 Difference]: With dead ends: 544 [2021-06-05 14:40:40,108 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 14:40:40,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:40:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 14:40:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 357. [2021-06-05 14:40:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-06-05 14:40:40,112 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 22 [2021-06-05 14:40:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:40,112 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-06-05 14:40:40,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-06-05 14:40:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:40,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:40,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:40,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1960 [2021-06-05 14:40:40,313 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash 471698638, now seen corresponding path program 192 times [2021-06-05 14:40:40,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:40,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40323992] [2021-06-05 14:40:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:40,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40323992] [2021-06-05 14:40:40,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40323992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:40,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560293486] [2021-06-05 14:40:40,396 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:40,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:40,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:40,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:40,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560293486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:40,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:40,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:40,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087201950] [2021-06-05 14:40:40,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:40,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:40,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:40,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:40,654 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:40,952 INFO L93 Difference]: Finished difference Result 490 states and 1410 transitions. [2021-06-05 14:40:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:40,953 INFO L225 Difference]: With dead ends: 490 [2021-06-05 14:40:40,953 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:40:40,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:40,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:40:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 357. [2021-06-05 14:40:40,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2021-06-05 14:40:40,957 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2021-06-05 14:40:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:40,957 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2021-06-05 14:40:40,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2021-06-05 14:40:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:40,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:40,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:41,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1965,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:41,158 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:41,159 INFO L82 PathProgramCache]: Analyzing trace with hash 293775178, now seen corresponding path program 193 times [2021-06-05 14:40:41,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:41,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393998898] [2021-06-05 14:40:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:41,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393998898] [2021-06-05 14:40:41,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393998898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883720783] [2021-06-05 14:40:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:41,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883720783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:41,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:40:41,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854788596] [2021-06-05 14:40:41,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:41,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:41,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:41,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:41,463 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:41,709 INFO L93 Difference]: Finished difference Result 454 states and 1342 transitions. [2021-06-05 14:40:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:40:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 22 [2021-06-05 14:40:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:41,710 INFO L225 Difference]: With dead ends: 454 [2021-06-05 14:40:41,710 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 14:40:41,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 14:40:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 324. [2021-06-05 14:40:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-05 14:40:41,714 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-05 14:40:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:41,714 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-05 14:40:41,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-05 14:40:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:41,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:41,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:41,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-06-05 14:40:41,915 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:41,915 INFO L82 PathProgramCache]: Analyzing trace with hash 483357642, now seen corresponding path program 194 times [2021-06-05 14:40:41,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:41,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693466119] [2021-06-05 14:40:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:40:41,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693466119] [2021-06-05 14:40:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693466119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:41,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524690105] [2021-06-05 14:40:41,954 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:42,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:42,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:42,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524690105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:42,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:42,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 14:40:42,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750785301] [2021-06-05 14:40:42,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:40:42,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:42,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:40:42,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:40:42,153 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:42,720 INFO L93 Difference]: Finished difference Result 716 states and 2103 transitions. [2021-06-05 14:40:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:40:42,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:42,721 INFO L225 Difference]: With dead ends: 716 [2021-06-05 14:40:42,721 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 14:40:42,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:40:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 14:40:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 309. [2021-06-05 14:40:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 14:40:42,726 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2021-06-05 14:40:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:42,726 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 14:40:42,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 14:40:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:42,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:42,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:42,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1974,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:42,927 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1787383922, now seen corresponding path program 195 times [2021-06-05 14:40:42,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:42,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96945180] [2021-06-05 14:40:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:42,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:42,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96945180] [2021-06-05 14:40:42,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96945180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:42,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578769203] [2021-06-05 14:40:42,982 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:43,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 14:40:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:40:43,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578769203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:43,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 14:40:43,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875193564] [2021-06-05 14:40:43,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:43,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:43,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:43,186 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:43,312 INFO L93 Difference]: Finished difference Result 627 states and 1817 transitions. [2021-06-05 14:40:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:40:43,312 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 22 [2021-06-05 14:40:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:43,313 INFO L225 Difference]: With dead ends: 627 [2021-06-05 14:40:43,313 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 14:40:43,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 14:40:43,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 329. [2021-06-05 14:40:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2021-06-05 14:40:43,317 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2021-06-05 14:40:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:43,317 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2021-06-05 14:40:43,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2021-06-05 14:40:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:43,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:43,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:43,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-06-05 14:40:43,518 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash -772869444, now seen corresponding path program 196 times [2021-06-05 14:40:43,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:43,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139247723] [2021-06-05 14:40:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:43,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:43,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139247723] [2021-06-05 14:40:43,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139247723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503419298] [2021-06-05 14:40:43,585 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:43,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:43,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503419298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:43,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:43,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 14:40:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983021780] [2021-06-05 14:40:43,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:43,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:43,824 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:44,656 INFO L93 Difference]: Finished difference Result 999 states and 2873 transitions. [2021-06-05 14:40:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:40:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 22 [2021-06-05 14:40:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:44,658 INFO L225 Difference]: With dead ends: 999 [2021-06-05 14:40:44,658 INFO L226 Difference]: Without dead ends: 858 [2021-06-05 14:40:44,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:40:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-05 14:40:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 339. [2021-06-05 14:40:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2021-06-05 14:40:44,663 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2021-06-05 14:40:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:44,663 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2021-06-05 14:40:44,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2021-06-05 14:40:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:44,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:44,663 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:44,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:44,864 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:44,864 INFO L82 PathProgramCache]: Analyzing trace with hash 400799254, now seen corresponding path program 197 times [2021-06-05 14:40:44,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:44,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821272140] [2021-06-05 14:40:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:44,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:44,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821272140] [2021-06-05 14:40:44,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821272140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:44,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931535888] [2021-06-05 14:40:44,915 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:45,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:40:45,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:45,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:45,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931535888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:45,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:45,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 14:40:45,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223019325] [2021-06-05 14:40:45,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:45,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:45,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:45,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:45,137 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:45,764 INFO L93 Difference]: Finished difference Result 816 states and 2373 transitions. [2021-06-05 14:40:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:40:45,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 22 [2021-06-05 14:40:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:45,765 INFO L225 Difference]: With dead ends: 816 [2021-06-05 14:40:45,765 INFO L226 Difference]: Without dead ends: 714 [2021-06-05 14:40:45,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:40:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-05 14:40:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 304. [2021-06-05 14:40:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 14:40:45,770 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 14:40:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:45,770 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 14:40:45,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 14:40:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:45,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:45,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:45,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1993,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:45,971 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1757356874, now seen corresponding path program 198 times [2021-06-05 14:40:45,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:45,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008240065] [2021-06-05 14:40:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:46,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008240065] [2021-06-05 14:40:46,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008240065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917516476] [2021-06-05 14:40:46,047 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:40:46,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917516476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:46,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:46,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994846081] [2021-06-05 14:40:46,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:46,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:46,307 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:46,675 INFO L93 Difference]: Finished difference Result 674 states and 1948 transitions. [2021-06-05 14:40:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:40:46,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:46,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:46,676 INFO L225 Difference]: With dead ends: 674 [2021-06-05 14:40:46,676 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 14:40:46,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:40:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 14:40:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 325. [2021-06-05 14:40:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.990740740740741) internal successors, (969), 324 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 969 transitions. [2021-06-05 14:40:46,680 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 969 transitions. Word has length 22 [2021-06-05 14:40:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:46,681 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 969 transitions. [2021-06-05 14:40:46,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 969 transitions. [2021-06-05 14:40:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:46,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:46,681 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:46,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2000,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:46,882 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1523095944, now seen corresponding path program 199 times [2021-06-05 14:40:46,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:46,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845054963] [2021-06-05 14:40:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:46,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:46,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845054963] [2021-06-05 14:40:46,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845054963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:46,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519937230] [2021-06-05 14:40:46,972 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:47,202 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 9 treesize of output 2 [2021-06-05 14:40:47,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:47,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:47,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:47,222 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 9 treesize of output 2 [2021-06-05 14:40:47,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:47,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:47,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:47,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:40:47,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:47,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:47,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:47,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:47,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:40:47,259 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-05 14:40:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:47,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519937230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:47,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:47,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887327111] [2021-06-05 14:40:47,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:47,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:47,373 INFO L87 Difference]: Start difference. First operand 325 states and 969 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:47,925 INFO L93 Difference]: Finished difference Result 724 states and 2053 transitions. [2021-06-05 14:40:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:40:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:47,926 INFO L225 Difference]: With dead ends: 724 [2021-06-05 14:40:47,926 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 14:40:47,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:40:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 14:40:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 318. [2021-06-05 14:40:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2021-06-05 14:40:47,930 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2021-06-05 14:40:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:47,930 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2021-06-05 14:40:47,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2021-06-05 14:40:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:47,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:47,931 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:48,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:48,131 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:48,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2110841266, now seen corresponding path program 200 times [2021-06-05 14:40:48,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:48,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133163315] [2021-06-05 14:40:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:48,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133163315] [2021-06-05 14:40:48,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133163315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577749270] [2021-06-05 14:40:48,257 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:48,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:48,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:48,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:48,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,506 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 8 treesize of output 1 [2021-06-05 14:40:48,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,510 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 9 treesize of output 2 [2021-06-05 14:40:48,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:48,516 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 9 treesize of output 2 [2021-06-05 14:40:48,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:48,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:48,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:48,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 14:40:48,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-05 14:40:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577749270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:48,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:48,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:40:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050714603] [2021-06-05 14:40:48,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:48,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:48,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:48,652 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:49,031 INFO L93 Difference]: Finished difference Result 418 states and 1234 transitions. [2021-06-05 14:40:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:40:49,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:49,032 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:40:49,032 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:40:49,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:40:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:40:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 326. [2021-06-05 14:40:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9692307692307693) internal successors, (965), 325 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 965 transitions. [2021-06-05 14:40:49,041 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 965 transitions. Word has length 22 [2021-06-05 14:40:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:49,041 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 965 transitions. [2021-06-05 14:40:49,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 965 transitions. [2021-06-05 14:40:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:49,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:49,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:49,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-06-05 14:40:49,242 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:49,242 INFO L82 PathProgramCache]: Analyzing trace with hash 871558594, now seen corresponding path program 201 times [2021-06-05 14:40:49,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:49,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167315871] [2021-06-05 14:40:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:49,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167315871] [2021-06-05 14:40:49,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167315871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421489279] [2021-06-05 14:40:49,316 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:49,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:49,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:49,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:49,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:49,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:49,495 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 9 treesize of output 2 [2021-06-05 14:40:49,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:49,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:49,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:40:49,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-05 14:40:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:49,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421489279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:49,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:49,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:49,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013516516] [2021-06-05 14:40:49,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:49,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:49,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:49,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:49,771 INFO L87 Difference]: Start difference. First operand 326 states and 965 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:50,072 INFO L93 Difference]: Finished difference Result 774 states and 2239 transitions. [2021-06-05 14:40:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:40:50,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:50,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:50,073 INFO L225 Difference]: With dead ends: 774 [2021-06-05 14:40:50,073 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 14:40:50,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:40:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 14:40:50,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 354. [2021-06-05 14:40:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0509915014164304) internal successors, (1077), 353 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1077 transitions. [2021-06-05 14:40:50,077 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1077 transitions. Word has length 22 [2021-06-05 14:40:50,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:50,078 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1077 transitions. [2021-06-05 14:40:50,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1077 transitions. [2021-06-05 14:40:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:50,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:50,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:50,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:50,300 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1886073072, now seen corresponding path program 202 times [2021-06-05 14:40:50,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:50,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353329685] [2021-06-05 14:40:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:50,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353329685] [2021-06-05 14:40:50,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353329685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072082331] [2021-06-05 14:40:50,374 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:50,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:50,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:50,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:50,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:50,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:50,581 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:50,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:50,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:50,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:40:50,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:32 [2021-06-05 14:40:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:50,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072082331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:50,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:50,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 14:40:50,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350764442] [2021-06-05 14:40:50,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:50,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:50,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:50,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:50,825 INFO L87 Difference]: Start difference. First operand 354 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:51,169 INFO L93 Difference]: Finished difference Result 702 states and 2030 transitions. [2021-06-05 14:40:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:40:51,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 22 [2021-06-05 14:40:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:51,169 INFO L225 Difference]: With dead ends: 702 [2021-06-05 14:40:51,170 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 14:40:51,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:40:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 14:40:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 367. [2021-06-05 14:40:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.010928961748634) internal successors, (1102), 366 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1102 transitions. [2021-06-05 14:40:51,174 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1102 transitions. Word has length 22 [2021-06-05 14:40:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:51,175 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1102 transitions. [2021-06-05 14:40:51,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1102 transitions. [2021-06-05 14:40:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:51,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:51,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:51,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2172,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:51,381 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1235225526, now seen corresponding path program 203 times [2021-06-05 14:40:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:51,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526002442] [2021-06-05 14:40:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:51,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:51,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526002442] [2021-06-05 14:40:51,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526002442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:51,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952311113] [2021-06-05 14:40:51,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:51,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:51,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:51,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:51,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:51,645 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 9 treesize of output 2 [2021-06-05 14:40:51,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:51,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:51,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:40:51,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-05 14:40:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:51,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952311113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:51,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:51,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:51,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247222443] [2021-06-05 14:40:51,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:51,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:51,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:51,738 INFO L87 Difference]: Start difference. First operand 367 states and 1102 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:52,190 INFO L93 Difference]: Finished difference Result 533 states and 1563 transitions. [2021-06-05 14:40:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:40:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:52,191 INFO L225 Difference]: With dead ends: 533 [2021-06-05 14:40:52,191 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 14:40:52,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:40:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 14:40:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 323. [2021-06-05 14:40:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.968944099378882) internal successors, (956), 322 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 956 transitions. [2021-06-05 14:40:52,195 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 956 transitions. Word has length 22 [2021-06-05 14:40:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:52,195 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 956 transitions. [2021-06-05 14:40:52,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 956 transitions. [2021-06-05 14:40:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:52,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:52,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:52,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2228,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:52,396 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash 343747060, now seen corresponding path program 204 times [2021-06-05 14:40:52,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:52,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237512546] [2021-06-05 14:40:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:52,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:52,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237512546] [2021-06-05 14:40:52,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237512546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:52,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670944480] [2021-06-05 14:40:52,532 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:52,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:40:52,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:52,893 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 8 treesize of output 1 [2021-06-05 14:40:52,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:52,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:52,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:52,897 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 9 treesize of output 2 [2021-06-05 14:40:52,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:52,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:52,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:52,918 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 8 treesize of output 1 [2021-06-05 14:40:52,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:52,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:52,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:52,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:52,999 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.6 percent of original size [2021-06-05 14:40:53,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-05 14:40:53,001 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:78 [2021-06-05 14:40:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:53,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670944480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:53,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:53,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:40:53,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588067044] [2021-06-05 14:40:53,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:53,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:53,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:53,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:53,178 INFO L87 Difference]: Start difference. First operand 323 states and 956 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:53,636 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-05 14:40:53,840 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 14:40:53,978 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 14:40:54,298 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 14:40:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:54,344 INFO L93 Difference]: Finished difference Result 585 states and 1689 transitions. [2021-06-05 14:40:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:40:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:54,345 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:40:54,345 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 14:40:54,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1130.6ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:40:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 14:40:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 316. [2021-06-05 14:40:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.961904761904762) internal successors, (933), 315 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 933 transitions. [2021-06-05 14:40:54,349 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 933 transitions. Word has length 22 [2021-06-05 14:40:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:54,349 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 933 transitions. [2021-06-05 14:40:54,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 933 transitions. [2021-06-05 14:40:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:40:54,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:54,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:54,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:54,550 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:54,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379422, now seen corresponding path program 205 times [2021-06-05 14:40:54,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:54,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405469238] [2021-06-05 14:40:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:54,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405469238] [2021-06-05 14:40:54,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405469238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660835975] [2021-06-05 14:40:54,785 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:54,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:40:54,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:55,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:55,062 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 9 treesize of output 2 [2021-06-05 14:40:55,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,066 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 4 treesize of output 2 [2021-06-05 14:40:55,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,263 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-05 14:40:55,263 INFO L628 ElimStorePlain]: treesize reduction 71, result has 69.8 percent of original size [2021-06-05 14:40:55,267 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 3 treesize of output 1 [2021-06-05 14:40:55,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:55,355 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 4 treesize of output 2 [2021-06-05 14:40:55,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,359 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 4 treesize of output 2 [2021-06-05 14:40:55,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:55,442 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 3 treesize of output 1 [2021-06-05 14:40:55,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:55,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:55,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:40:55,523 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:247, output treesize:150 [2021-06-05 14:40:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:55,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660835975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:55,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:55,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 14:40:55,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542344928] [2021-06-05 14:40:55,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:40:55,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:40:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:55,742 INFO L87 Difference]: Start difference. First operand 316 states and 933 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:56,735 INFO L93 Difference]: Finished difference Result 497 states and 1429 transitions. [2021-06-05 14:40:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:40:56,735 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 14:40:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:56,736 INFO L225 Difference]: With dead ends: 497 [2021-06-05 14:40:56,736 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 14:40:56,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1087.4ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:40:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 14:40:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 304. [2021-06-05 14:40:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-05 14:40:56,740 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-05 14:40:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:56,740 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-05 14:40:56,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-05 14:40:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:40:56,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:56,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:56,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2324 [2021-06-05 14:40:56,963 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash -410758918, now seen corresponding path program 206 times [2021-06-05 14:40:56,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:56,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177067176] [2021-06-05 14:40:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:40:57,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:57,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177067176] [2021-06-05 14:40:57,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177067176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:57,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617243784] [2021-06-05 14:40:57,058 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:57,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:57,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:40:57,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:57,214 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 3 treesize of output 1 [2021-06-05 14:40:57,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,297 INFO L628 ElimStorePlain]: treesize reduction 26, result has 77.2 percent of original size [2021-06-05 14:40:57,300 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 4 treesize of output 2 [2021-06-05 14:40:57,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,354 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-05 14:40:57,357 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 4 treesize of output 2 [2021-06-05 14:40:57,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:57,385 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 3 treesize of output 1 [2021-06-05 14:40:57,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:57,411 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-06-05 14:40:57,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:40:57,413 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:50 [2021-06-05 14:40:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:57,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:57,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:40:57,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:57,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:57,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:58,064 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:40:58,064 INFO L628 ElimStorePlain]: treesize reduction 133, result has 42.7 percent of original size [2021-06-05 14:40:58,067 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 3 treesize of output 1 [2021-06-05 14:40:58,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:58,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:58,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:40:58,114 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:306, output treesize:70 [2021-06-05 14:40:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:40:58,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617243784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:58,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:58,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:40:58,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252443344] [2021-06-05 14:40:58,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:40:58,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:40:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:40:58,264 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:59,196 INFO L93 Difference]: Finished difference Result 860 states and 2502 transitions. [2021-06-05 14:40:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:40:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:40:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:59,197 INFO L225 Difference]: With dead ends: 860 [2021-06-05 14:40:59,197 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 14:40:59,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1019.4ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:40:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 14:40:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 333. [2021-06-05 14:40:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0542168674698793) internal successors, (1014), 332 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1014 transitions. [2021-06-05 14:40:59,202 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1014 transitions. Word has length 23 [2021-06-05 14:40:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:59,202 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1014 transitions. [2021-06-05 14:40:59,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1014 transitions. [2021-06-05 14:40:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:40:59,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:59,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:59,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2352,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:59,403 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2116971352, now seen corresponding path program 207 times [2021-06-05 14:40:59,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:59,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41566272] [2021-06-05 14:40:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:59,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:59,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41566272] [2021-06-05 14:40:59,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41566272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:59,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495517724] [2021-06-05 14:40:59,573 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:59,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:59,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:59,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:40:59,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:59,721 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 3 treesize of output 1 [2021-06-05 14:40:59,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,794 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-05 14:40:59,797 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 3 treesize of output 1 [2021-06-05 14:40:59,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,800 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 4 treesize of output 2 [2021-06-05 14:40:59,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,803 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 4 treesize of output 2 [2021-06-05 14:40:59,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:59,850 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 14:40:59,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:40:59,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:122, output treesize:50 [2021-06-05 14:41:00,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:00,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:00,211 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 7 treesize of output 1 [2021-06-05 14:41:00,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:00,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:00,218 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 8 treesize of output 1 [2021-06-05 14:41:00,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:00,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:00,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:00,225 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 8 treesize of output 1 [2021-06-05 14:41:00,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:00,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:00,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:00,266 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 14:41:00,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:00,267 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 14:41:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:00,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495517724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:00,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:00,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 14:41:00,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287072080] [2021-06-05 14:41:00,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:41:00,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:41:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:00,342 INFO L87 Difference]: Start difference. First operand 333 states and 1014 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:03,080 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-05 14:41:03,827 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-06-05 14:41:04,227 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-05 14:41:04,362 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 14:41:04,764 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 14:41:04,898 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-05 14:41:05,036 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-05 14:41:05,203 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-05 14:41:05,359 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-05 14:41:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:05,473 INFO L93 Difference]: Finished difference Result 1183 states and 3328 transitions. [2021-06-05 14:41:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:41:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:41:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:05,475 INFO L225 Difference]: With dead ends: 1183 [2021-06-05 14:41:05,475 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 14:41:05,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4683.7ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 14:41:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 14:41:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 404. [2021-06-05 14:41:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.129032258064516) internal successors, (1261), 403 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1261 transitions. [2021-06-05 14:41:05,481 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1261 transitions. Word has length 23 [2021-06-05 14:41:05,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:05,481 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1261 transitions. [2021-06-05 14:41:05,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:05,481 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1261 transitions. [2021-06-05 14:41:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:05,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:05,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:05,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:05,682 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:05,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:05,682 INFO L82 PathProgramCache]: Analyzing trace with hash -305065448, now seen corresponding path program 208 times [2021-06-05 14:41:05,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:05,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079690769] [2021-06-05 14:41:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:05,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:05,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079690769] [2021-06-05 14:41:05,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079690769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:05,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281180606] [2021-06-05 14:41:05,883 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:05,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:05,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:05,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:06,015 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 3 treesize of output 1 [2021-06-05 14:41:06,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,089 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-05 14:41:06,092 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 3 treesize of output 1 [2021-06-05 14:41:06,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:06,129 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 4 treesize of output 2 [2021-06-05 14:41:06,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,132 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 4 treesize of output 2 [2021-06-05 14:41:06,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,180 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 14:41:06,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:06,182 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:50 [2021-06-05 14:41:06,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:06,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:06,568 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 8 treesize of output 1 [2021-06-05 14:41:06,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:06,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:06,573 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 8 treesize of output 1 [2021-06-05 14:41:06,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:06,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:06,577 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 7 treesize of output 1 [2021-06-05 14:41:06,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:06,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:06,618 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 14:41:06,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:06,620 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 14:41:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:06,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281180606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:06,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:06,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 14:41:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867916300] [2021-06-05 14:41:06,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:41:06,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:41:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:06,691 INFO L87 Difference]: Start difference. First operand 404 states and 1261 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,566 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 14:41:09,709 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 14:41:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:09,743 INFO L93 Difference]: Finished difference Result 977 states and 2802 transitions. [2021-06-05 14:41:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:41:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:41:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:09,745 INFO L225 Difference]: With dead ends: 977 [2021-06-05 14:41:09,745 INFO L226 Difference]: Without dead ends: 823 [2021-06-05 14:41:09,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2750.8ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:41:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-05 14:41:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 427. [2021-06-05 14:41:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2021-06-05 14:41:09,750 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 23 [2021-06-05 14:41:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:09,750 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2021-06-05 14:41:09,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2021-06-05 14:41:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:09,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:09,751 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:09,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-05 14:41:09,951 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1627372824, now seen corresponding path program 209 times [2021-06-05 14:41:09,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:09,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406908642] [2021-06-05 14:41:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:10,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:10,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406908642] [2021-06-05 14:41:10,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406908642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:10,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980198356] [2021-06-05 14:41:10,053 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:10,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:10,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:10,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:10,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:10,228 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 3 treesize of output 1 [2021-06-05 14:41:10,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,300 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-05 14:41:10,303 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 3 treesize of output 1 [2021-06-05 14:41:10,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,306 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 4 treesize of output 2 [2021-06-05 14:41:10,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,309 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 4 treesize of output 2 [2021-06-05 14:41:10,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,357 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 14:41:10,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:10,360 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:50 [2021-06-05 14:41:10,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:10,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:10,603 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 7 treesize of output 1 [2021-06-05 14:41:10,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:10,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:10,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:10,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:41:10,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-05 14:41:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:10,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980198356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:10,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:10,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:41:10,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242104563] [2021-06-05 14:41:10,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:10,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:10,673 INFO L87 Difference]: Start difference. First operand 427 states and 1325 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:12,954 INFO L93 Difference]: Finished difference Result 970 states and 2782 transitions. [2021-06-05 14:41:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:41:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:41:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:12,956 INFO L225 Difference]: With dead ends: 970 [2021-06-05 14:41:12,956 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 14:41:12,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2008.8ms TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:41:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 14:41:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 517. [2021-06-05 14:41:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.011627906976744) internal successors, (1554), 516 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1554 transitions. [2021-06-05 14:41:12,962 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1554 transitions. Word has length 23 [2021-06-05 14:41:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:12,962 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1554 transitions. [2021-06-05 14:41:12,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1554 transitions. [2021-06-05 14:41:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:12,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:12,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:13,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2641,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:13,163 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:13,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1406216122, now seen corresponding path program 210 times [2021-06-05 14:41:13,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:13,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204836425] [2021-06-05 14:41:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:13,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204836425] [2021-06-05 14:41:13,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204836425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699279766] [2021-06-05 14:41:13,253 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:13,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:13,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:13,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:13,425 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 4 treesize of output 2 [2021-06-05 14:41:13,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,529 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 14:41:13,530 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 14:41:13,533 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 3 treesize of output 1 [2021-06-05 14:41:13,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,597 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.7 percent of original size [2021-06-05 14:41:13,600 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 3 treesize of output 1 [2021-06-05 14:41:13,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:13,654 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 14:41:13,655 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-06-05 14:41:13,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:13,657 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-05 14:41:14,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:14,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:14,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:14,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:14,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:14,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:14,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:14,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:14,128 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 9 treesize of output 2 [2021-06-05 14:41:14,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:14,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:14,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,264 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 14:41:14,264 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.2 percent of original size [2021-06-05 14:41:14,267 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 4 treesize of output 2 [2021-06-05 14:41:14,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,271 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 4 treesize of output 2 [2021-06-05 14:41:14,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:14,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:14,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:41:14,328 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:78 [2021-06-05 14:41:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:14,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699279766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:14,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:14,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:41:14,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311610570] [2021-06-05 14:41:14,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:14,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:14,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:14,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:14,492 INFO L87 Difference]: Start difference. First operand 517 states and 1554 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:16,573 INFO L93 Difference]: Finished difference Result 1104 states and 3228 transitions. [2021-06-05 14:41:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:41:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 23 [2021-06-05 14:41:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:16,574 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 14:41:16,574 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 14:41:16,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1589.1ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:41:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 14:41:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 558. [2021-06-05 14:41:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-05 14:41:16,581 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-05 14:41:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:16,581 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-05 14:41:16,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-05 14:41:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:16,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:16,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:16,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2678 [2021-06-05 14:41:16,782 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash 637122102, now seen corresponding path program 211 times [2021-06-05 14:41:16,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:16,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749733549] [2021-06-05 14:41:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:16,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:16,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749733549] [2021-06-05 14:41:16,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749733549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:16,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956095109] [2021-06-05 14:41:16,875 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:16,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:16,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:17,217 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_68, v_prenex_69, ends_with_2, v_prenex_70], 1=[ends_with_6]} [2021-06-05 14:41:17,220 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 4 treesize of output 2 [2021-06-05 14:41:17,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:17,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:17,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:17,308 INFO L628 ElimStorePlain]: treesize reduction 124, result has 39.5 percent of original size [2021-06-05 14:41:17,311 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 3 treesize of output 1 [2021-06-05 14:41:17,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:17,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:17,345 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 14:41:17,348 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 4 treesize of output 2 [2021-06-05 14:41:17,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:17,409 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-05 14:41:17,412 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 4 treesize of output 2 [2021-06-05 14:41:17,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:17,415 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 4 treesize of output 2 [2021-06-05 14:41:17,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:17,418 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 3 treesize of output 1 [2021-06-05 14:41:17,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:17,466 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-05 14:41:17,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:17,468 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:241, output treesize:35 [2021-06-05 14:41:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:17,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956095109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:17,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:17,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:41:17,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156718460] [2021-06-05 14:41:17,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:41:17,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:17,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:41:17,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:41:17,554 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:17,809 INFO L93 Difference]: Finished difference Result 750 states and 2242 transitions. [2021-06-05 14:41:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:41:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 23 [2021-06-05 14:41:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:17,810 INFO L225 Difference]: With dead ends: 750 [2021-06-05 14:41:17,810 INFO L226 Difference]: Without dead ends: 696 [2021-06-05 14:41:17,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:41:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-05 14:41:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 558. [2021-06-05 14:41:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-05 14:41:17,817 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-05 14:41:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:17,817 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-05 14:41:17,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-05 14:41:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:17,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:17,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:18,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2837,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:18,018 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:18,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1079785372, now seen corresponding path program 212 times [2021-06-05 14:41:18,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:18,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340454110] [2021-06-05 14:41:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:18,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340454110] [2021-06-05 14:41:18,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340454110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:18,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427745762] [2021-06-05 14:41:18,116 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:18,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:18,300 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 3 treesize of output 1 [2021-06-05 14:41:18,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,384 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.2 percent of original size [2021-06-05 14:41:18,386 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 4 treesize of output 2 [2021-06-05 14:41:18,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,390 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 4 treesize of output 2 [2021-06-05 14:41:18,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,393 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 3 treesize of output 1 [2021-06-05 14:41:18,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,450 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-05 14:41:18,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:18,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:59 [2021-06-05 14:41:18,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:18,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:18,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:41:18,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:18,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:18,674 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 9 treesize of output 2 [2021-06-05 14:41:18,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:18,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:18,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:41:18,682 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,794 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 14:41:18,794 INFO L628 ElimStorePlain]: treesize reduction 136, result has 42.1 percent of original size [2021-06-05 14:41:18,797 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 3 treesize of output 1 [2021-06-05 14:41:18,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:18,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:18,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:18,844 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-05 14:41:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:19,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427745762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:19,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:19,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:41:19,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427660128] [2021-06-05 14:41:19,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:41:19,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:19,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:41:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:41:19,001 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:19,780 INFO L93 Difference]: Finished difference Result 1129 states and 3259 transitions. [2021-06-05 14:41:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:41:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 23 [2021-06-05 14:41:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:19,781 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 14:41:19,781 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 14:41:19,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 854.4ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:41:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 14:41:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 588. [2021-06-05 14:41:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.110732538330494) internal successors, (1826), 587 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1826 transitions. [2021-06-05 14:41:19,788 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1826 transitions. Word has length 23 [2021-06-05 14:41:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:19,788 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1826 transitions. [2021-06-05 14:41:19,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1826 transitions. [2021-06-05 14:41:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:19,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:19,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:19,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-06-05 14:41:19,989 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:19,990 INFO L82 PathProgramCache]: Analyzing trace with hash 353330104, now seen corresponding path program 213 times [2021-06-05 14:41:19,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:19,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143171081] [2021-06-05 14:41:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:20,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:20,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143171081] [2021-06-05 14:41:20,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143171081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:20,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883290428] [2021-06-05 14:41:20,094 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:20,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:41:20,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:20,248 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 3 treesize of output 1 [2021-06-05 14:41:20,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,334 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-05 14:41:20,337 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 4 treesize of output 2 [2021-06-05 14:41:20,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,348 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 4 treesize of output 2 [2021-06-05 14:41:20,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,409 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 14:41:20,411 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 3 treesize of output 1 [2021-06-05 14:41:20,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:20,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:20,443 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 14:41:20,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:20,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:20,656 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 8 treesize of output 1 [2021-06-05 14:41:20,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:20,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:20,660 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:20,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:20,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:20,666 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 8 treesize of output 1 [2021-06-05 14:41:20,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:20,704 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-05 14:41:20,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:20,705 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 14:41:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:20,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883290428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:20,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:20,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 14:41:20,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240171061] [2021-06-05 14:41:20,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:20,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:20,766 INFO L87 Difference]: Start difference. First operand 588 states and 1826 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:22,452 INFO L93 Difference]: Finished difference Result 1145 states and 3412 transitions. [2021-06-05 14:41:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:41:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 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 23 [2021-06-05 14:41:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:22,453 INFO L225 Difference]: With dead ends: 1145 [2021-06-05 14:41:22,453 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 14:41:22,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1288.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:41:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 14:41:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 639. [2021-06-05 14:41:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.115987460815047) internal successors, (1988), 638 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1988 transitions. [2021-06-05 14:41:22,460 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1988 transitions. Word has length 23 [2021-06-05 14:41:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:22,460 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1988 transitions. [2021-06-05 14:41:22,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1988 transitions. [2021-06-05 14:41:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:22,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:22,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:22,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:22,662 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:22,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1859126854, now seen corresponding path program 214 times [2021-06-05 14:41:22,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:22,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663883559] [2021-06-05 14:41:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:22,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:22,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663883559] [2021-06-05 14:41:22,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663883559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:22,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198121871] [2021-06-05 14:41:22,799 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:22,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:22,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:22,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:22,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:22,969 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 4 treesize of output 2 [2021-06-05 14:41:22,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:23,093 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-05 14:41:23,093 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-05 14:41:23,096 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 3 treesize of output 1 [2021-06-05 14:41:23,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:23,100 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 3 treesize of output 1 [2021-06-05 14:41:23,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:23,181 INFO L628 ElimStorePlain]: treesize reduction 52, result has 64.9 percent of original size [2021-06-05 14:41:23,181 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-05 14:41:23,181 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-05 14:41:23,183 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 4 treesize of output 2 [2021-06-05 14:41:23,184 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:23,241 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 14:41:23,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:23,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:160, output treesize:70 [2021-06-05 14:41:23,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:23,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:23,890 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 9 treesize of output 2 [2021-06-05 14:41:23,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:23,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:23,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:23,896 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 8 treesize of output 1 [2021-06-05 14:41:23,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:23,901 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 8 treesize of output 1 [2021-06-05 14:41:23,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:23,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:23,905 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 9 treesize of output 2 [2021-06-05 14:41:23,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,040 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 14:41:24,040 INFO L628 ElimStorePlain]: treesize reduction 199, result has 37.8 percent of original size [2021-06-05 14:41:24,043 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 4 treesize of output 2 [2021-06-05 14:41:24,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,047 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 4 treesize of output 2 [2021-06-05 14:41:24,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:24,102 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 3 treesize of output 1 [2021-06-05 14:41:24,103 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:24,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:24,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:24,155 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:394, output treesize:68 [2021-06-05 14:41:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:24,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198121871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:24,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:24,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:41:24,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808350487] [2021-06-05 14:41:24,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:24,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:24,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:24,306 INFO L87 Difference]: Start difference. First operand 639 states and 1988 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:27,435 INFO L93 Difference]: Finished difference Result 1668 states and 4813 transitions. [2021-06-05 14:41:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 14:41:27,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 23 [2021-06-05 14:41:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:27,437 INFO L225 Difference]: With dead ends: 1668 [2021-06-05 14:41:27,437 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 14:41:27,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2796.0ms TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:41:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 14:41:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 678. [2021-06-05 14:41:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.193500738552437) internal successors, (2162), 677 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2162 transitions. [2021-06-05 14:41:27,447 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2162 transitions. Word has length 23 [2021-06-05 14:41:27,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:27,447 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2162 transitions. [2021-06-05 14:41:27,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:27,447 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2162 transitions. [2021-06-05 14:41:27,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:27,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:27,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:27,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-06-05 14:41:27,648 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:27,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:27,648 INFO L82 PathProgramCache]: Analyzing trace with hash 630316840, now seen corresponding path program 215 times [2021-06-05 14:41:27,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:27,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407051320] [2021-06-05 14:41:27,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:27,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:27,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407051320] [2021-06-05 14:41:27,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407051320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:27,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715432329] [2021-06-05 14:41:27,781 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:27,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:27,935 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 4 treesize of output 2 [2021-06-05 14:41:27,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,939 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 4 treesize of output 2 [2021-06-05 14:41:27,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:27,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:27,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,003 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.7 percent of original size [2021-06-05 14:41:28,003 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-05 14:41:28,006 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 3 treesize of output 1 [2021-06-05 14:41:28,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:28,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:28,037 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 14:41:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:28,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:28,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:28,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:28,239 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 8 treesize of output 1 [2021-06-05 14:41:28,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:28,242 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 7 treesize of output 1 [2021-06-05 14:41:28,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,305 INFO L628 ElimStorePlain]: treesize reduction 86, result has 40.7 percent of original size [2021-06-05 14:41:28,307 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 4 treesize of output 2 [2021-06-05 14:41:28,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:28,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:28,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:28,331 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:37 [2021-06-05 14:41:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:28,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715432329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:28,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:28,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:41:28,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951433646] [2021-06-05 14:41:28,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:28,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:28,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:28,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:28,439 INFO L87 Difference]: Start difference. First operand 678 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:30,234 INFO L93 Difference]: Finished difference Result 1398 states and 4082 transitions. [2021-06-05 14:41:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:41:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 23 [2021-06-05 14:41:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:30,236 INFO L225 Difference]: With dead ends: 1398 [2021-06-05 14:41:30,236 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 14:41:30,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1539.1ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:41:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 14:41:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 675. [2021-06-05 14:41:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 3.1839762611275964) internal successors, (2146), 674 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2146 transitions. [2021-06-05 14:41:30,245 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2146 transitions. Word has length 23 [2021-06-05 14:41:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:30,245 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 2146 transitions. [2021-06-05 14:41:30,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2146 transitions. [2021-06-05 14:41:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:30,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:30,246 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:30,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-06-05 14:41:30,446 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash 620245514, now seen corresponding path program 216 times [2021-06-05 14:41:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:30,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384526998] [2021-06-05 14:41:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:30,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:30,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384526998] [2021-06-05 14:41:30,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384526998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:30,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906817166] [2021-06-05 14:41:30,566 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:30,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:41:30,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:30,718 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 4 treesize of output 2 [2021-06-05 14:41:30,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:30,823 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 14:41:30,824 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 14:41:30,826 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 4 treesize of output 2 [2021-06-05 14:41:30,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:30,890 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.3 percent of original size [2021-06-05 14:41:30,890 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 14:41:30,892 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 3 treesize of output 1 [2021-06-05 14:41:30,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:30,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:30,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:30,923 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:59 [2021-06-05 14:41:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:31,127 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 8 treesize of output 1 [2021-06-05 14:41:31,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:31,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:31,130 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 7 treesize of output 1 [2021-06-05 14:41:31,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:31,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-05 14:41:31,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:31,158 INFO L628 ElimStorePlain]: treesize reduction 20, result has 58.3 percent of original size [2021-06-05 14:41:31,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:41:31,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-05 14:41:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:31,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906817166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:31,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:31,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:41:31,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341084736] [2021-06-05 14:41:31,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:31,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:31,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:31,223 INFO L87 Difference]: Start difference. First operand 675 states and 2146 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:31,855 INFO L93 Difference]: Finished difference Result 931 states and 2785 transitions. [2021-06-05 14:41:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:41:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 23 [2021-06-05 14:41:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:31,857 INFO L225 Difference]: With dead ends: 931 [2021-06-05 14:41:31,857 INFO L226 Difference]: Without dead ends: 811 [2021-06-05 14:41:31,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:41:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-05 14:41:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 677. [2021-06-05 14:41:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1819526627218937) internal successors, (2151), 676 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2151 transitions. [2021-06-05 14:41:31,864 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2151 transitions. Word has length 23 [2021-06-05 14:41:31,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:31,864 INFO L482 AbstractCegarLoop]: Abstraction has 677 states and 2151 transitions. [2021-06-05 14:41:31,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2151 transitions. [2021-06-05 14:41:31,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:31,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:31,865 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:32,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:32,065 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash -161287938, now seen corresponding path program 217 times [2021-06-05 14:41:32,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:32,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265804945] [2021-06-05 14:41:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:32,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:32,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265804945] [2021-06-05 14:41:32,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265804945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:32,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064947267] [2021-06-05 14:41:32,178 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:32,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 14:41:32,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:32,346 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 4 treesize of output 2 [2021-06-05 14:41:32,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,350 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 4 treesize of output 2 [2021-06-05 14:41:32,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,353 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 4 treesize of output 2 [2021-06-05 14:41:32,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,416 INFO L628 ElimStorePlain]: treesize reduction 55, result has 56.0 percent of original size [2021-06-05 14:41:32,419 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 3 treesize of output 1 [2021-06-05 14:41:32,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:32,447 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-06-05 14:41:32,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:32,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-05 14:41:32,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:32,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:32,701 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 7 treesize of output 1 [2021-06-05 14:41:32,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:32,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:32,705 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 8 treesize of output 1 [2021-06-05 14:41:32,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:32,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:32,709 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 7 treesize of output 1 [2021-06-05 14:41:32,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:32,714 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 8 treesize of output 1 [2021-06-05 14:41:32,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:32,756 INFO L628 ElimStorePlain]: treesize reduction 49, result has 46.7 percent of original size [2021-06-05 14:41:32,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:32,757 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-05 14:41:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:32,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064947267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:32,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:32,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:41:32,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062157892] [2021-06-05 14:41:32,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:32,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:32,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:32,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:32,820 INFO L87 Difference]: Start difference. First operand 677 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:34,938 INFO L93 Difference]: Finished difference Result 1484 states and 4400 transitions. [2021-06-05 14:41:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 14:41:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 23 [2021-06-05 14:41:34,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:34,940 INFO L225 Difference]: With dead ends: 1484 [2021-06-05 14:41:34,940 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 14:41:34,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1800.0ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:41:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 14:41:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 688. [2021-06-05 14:41:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.1935953420669576) internal successors, (2194), 687 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2194 transitions. [2021-06-05 14:41:34,948 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2194 transitions. Word has length 23 [2021-06-05 14:41:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:34,948 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2194 transitions. [2021-06-05 14:41:34,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2194 transitions. [2021-06-05 14:41:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:34,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:34,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:35,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3248 [2021-06-05 14:41:35,171 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1644882548, now seen corresponding path program 218 times [2021-06-05 14:41:35,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:35,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070124142] [2021-06-05 14:41:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:35,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:35,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070124142] [2021-06-05 14:41:35,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070124142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:35,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973290191] [2021-06-05 14:41:35,266 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:35,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:35,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:35,526 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 3 treesize of output 1 [2021-06-05 14:41:35,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,621 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.5 percent of original size [2021-06-05 14:41:35,624 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 4 treesize of output 2 [2021-06-05 14:41:35,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:35,672 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 3 treesize of output 1 [2021-06-05 14:41:35,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:35,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_98 vanished before elimination [2021-06-05 14:41:35,713 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 4 treesize of output 2 [2021-06-05 14:41:35,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:35,770 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-05 14:41:35,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:35,773 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:132, output treesize:59 [2021-06-05 14:41:35,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:35,998 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 7 treesize of output 1 [2021-06-05 14:41:35,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:36,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:36,002 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 7 treesize of output 1 [2021-06-05 14:41:36,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:36,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:36,006 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 8 treesize of output 1 [2021-06-05 14:41:36,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:41:36,009 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 8 treesize of output 1 [2021-06-05 14:41:36,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:36,052 INFO L628 ElimStorePlain]: treesize reduction 50, result has 46.2 percent of original size [2021-06-05 14:41:36,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:36,054 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-05 14:41:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:36,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973290191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:36,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:36,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:41:36,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957041699] [2021-06-05 14:41:36,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:41:36,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:41:36,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:41:36,123 INFO L87 Difference]: Start difference. First operand 688 states and 2194 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:37,507 INFO L93 Difference]: Finished difference Result 1183 states and 3509 transitions. [2021-06-05 14:41:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:41:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:41:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:37,509 INFO L225 Difference]: With dead ends: 1183 [2021-06-05 14:41:37,509 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 14:41:37,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1072.8ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:41:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 14:41:37,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 669. [2021-06-05 14:41:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.179640718562874) internal successors, (2124), 668 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2124 transitions. [2021-06-05 14:41:37,518 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2124 transitions. Word has length 23 [2021-06-05 14:41:37,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:37,518 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2124 transitions. [2021-06-05 14:41:37,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2124 transitions. [2021-06-05 14:41:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:37,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:37,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:37,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:37,721 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2094348922, now seen corresponding path program 219 times [2021-06-05 14:41:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:37,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585786943] [2021-06-05 14:41:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:37,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:37,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585786943] [2021-06-05 14:41:37,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585786943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:37,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587164764] [2021-06-05 14:41:37,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:37,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:37,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:37,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:38,055 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 3 treesize of output 1 [2021-06-05 14:41:38,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,122 INFO L628 ElimStorePlain]: treesize reduction 72, result has 54.7 percent of original size [2021-06-05 14:41:38,125 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 4 treesize of output 2 [2021-06-05 14:41:38,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,166 INFO L628 ElimStorePlain]: treesize reduction 31, result has 62.7 percent of original size [2021-06-05 14:41:38,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:41:38,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:162, output treesize:42 [2021-06-05 14:41:38,469 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, ends_with_2, v_prenex_104, v_prenex_103, v_prenex_105], 1=[ends_with_6]} [2021-06-05 14:41:38,472 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 4 treesize of output 2 [2021-06-05 14:41:38,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:38,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,607 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 14:41:38,607 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-06-05 14:41:38,610 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 3 treesize of output 1 [2021-06-05 14:41:38,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,614 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 3 treesize of output 1 [2021-06-05 14:41:38,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:38,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-05 14:41:38,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-05 14:41:38,673 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 4 treesize of output 2 [2021-06-05 14:41:38,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,677 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 4 treesize of output 2 [2021-06-05 14:41:38,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,776 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 14:41:38,779 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 3 treesize of output 1 [2021-06-05 14:41:38,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:41:38,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,785 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 4 treesize of output 2 [2021-06-05 14:41:38,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,789 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 4 treesize of output 2 [2021-06-05 14:41:38,789 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:38,875 INFO L628 ElimStorePlain]: treesize reduction 22, result has 78.6 percent of original size [2021-06-05 14:41:38,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:38,876 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:298, output treesize:35 [2021-06-05 14:41:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:41:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587164764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:38,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:38,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 14:41:38,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175660419] [2021-06-05 14:41:38,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:41:38,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:41:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:41:38,950 INFO L87 Difference]: Start difference. First operand 669 states and 2124 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:42,045 INFO L93 Difference]: Finished difference Result 1532 states and 4667 transitions. [2021-06-05 14:41:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 14:41:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 23 [2021-06-05 14:41:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:42,048 INFO L225 Difference]: With dead ends: 1532 [2021-06-05 14:41:42,048 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 14:41:42,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2709.5ms TimeCoverageRelationStatistics Valid=534, Invalid=3126, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 14:41:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 14:41:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 758. [2021-06-05 14:41:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.248348745046235) internal successors, (2459), 757 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2459 transitions. [2021-06-05 14:41:42,058 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2459 transitions. Word has length 23 [2021-06-05 14:41:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:42,058 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2459 transitions. [2021-06-05 14:41:42,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2459 transitions. [2021-06-05 14:41:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:42,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:42,059 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:42,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3363,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:42,282 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2146347564, now seen corresponding path program 220 times [2021-06-05 14:41:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:42,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906603354] [2021-06-05 14:41:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:42,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906603354] [2021-06-05 14:41:42,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906603354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717161154] [2021-06-05 14:41:42,398 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:42,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:42,647 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 3 treesize of output 1 [2021-06-05 14:41:42,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,651 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 4 treesize of output 2 [2021-06-05 14:41:42,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,655 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 3 treesize of output 1 [2021-06-05 14:41:42,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,659 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 4 treesize of output 2 [2021-06-05 14:41:42,660 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,663 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 4 treesize of output 2 [2021-06-05 14:41:42,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,670 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:42,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,758 INFO L628 ElimStorePlain]: treesize reduction 27, result has 78.6 percent of original size [2021-06-05 14:41:42,761 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 3 treesize of output 1 [2021-06-05 14:41:42,762 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:42,804 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 4 treesize of output 2 [2021-06-05 14:41:42,805 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,807 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 3 treesize of output 1 [2021-06-05 14:41:42,808 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,875 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-06-05 14:41:42,878 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 4 treesize of output 2 [2021-06-05 14:41:42,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:42,926 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.4 percent of original size [2021-06-05 14:41:42,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:42,937 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:231, output treesize:45 [2021-06-05 14:41:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:43,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717161154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:43,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:43,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:41:43,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604185897] [2021-06-05 14:41:43,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:43,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:43,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:43,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:43,034 INFO L87 Difference]: Start difference. First operand 758 states and 2459 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:43,468 INFO L93 Difference]: Finished difference Result 1012 states and 3166 transitions. [2021-06-05 14:41:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:41:43,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 23 [2021-06-05 14:41:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:43,469 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 14:41:43,469 INFO L226 Difference]: Without dead ends: 967 [2021-06-05 14:41:43,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:41:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-05 14:41:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 716. [2021-06-05 14:41:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.1706293706293707) internal successors, (2267), 715 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2267 transitions. [2021-06-05 14:41:43,477 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2267 transitions. Word has length 23 [2021-06-05 14:41:43,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:43,477 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2267 transitions. [2021-06-05 14:41:43,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2267 transitions. [2021-06-05 14:41:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:43,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:43,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:43,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3414 [2021-06-05 14:41:43,681 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -554888474, now seen corresponding path program 221 times [2021-06-05 14:41:43,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:43,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575268719] [2021-06-05 14:41:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:43,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:43,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575268719] [2021-06-05 14:41:43,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575268719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:43,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612703689] [2021-06-05 14:41:43,823 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:43,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:43,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:43,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:43,995 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 3 treesize of output 1 [2021-06-05 14:41:43,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:44,108 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 14:41:44,108 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.2 percent of original size [2021-06-05 14:41:44,111 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 4 treesize of output 2 [2021-06-05 14:41:44,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:44,186 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 14:41:44,188 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 4 treesize of output 2 [2021-06-05 14:41:44,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:44,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:44,236 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 3 treesize of output 1 [2021-06-05 14:41:44,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:44,291 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-06-05 14:41:44,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:41:44,294 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:60 [2021-06-05 14:41:44,706 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_112, ends_with_10], 3=[ends_with_2]} [2021-06-05 14:41:44,711 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 3 treesize of output 1 [2021-06-05 14:41:44,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:44,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:44,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:44,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:44,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,066 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 14:41:45,066 INFO L628 ElimStorePlain]: treesize reduction 220, result has 53.8 percent of original size [2021-06-05 14:41:45,070 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 4 treesize of output 2 [2021-06-05 14:41:45,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,090 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 3 treesize of output 1 [2021-06-05 14:41:45,092 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,095 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 3 treesize of output 1 [2021-06-05 14:41:45,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,099 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 3 treesize of output 1 [2021-06-05 14:41:45,100 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,103 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 4 treesize of output 2 [2021-06-05 14:41:45,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,108 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 4 treesize of output 2 [2021-06-05 14:41:45,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,112 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 4 treesize of output 2 [2021-06-05 14:41:45,113 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,301 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-05 14:41:45,301 INFO L628 ElimStorePlain]: treesize reduction 28, result has 87.9 percent of original size [2021-06-05 14:41:45,305 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 4 treesize of output 2 [2021-06-05 14:41:45,306 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,309 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 4 treesize of output 2 [2021-06-05 14:41:45,310 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,313 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 3 treesize of output 1 [2021-06-05 14:41:45,314 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,317 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 4 treesize of output 2 [2021-06-05 14:41:45,318 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,321 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 4 treesize of output 2 [2021-06-05 14:41:45,322 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,325 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 4 treesize of output 2 [2021-06-05 14:41:45,326 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:45,463 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 14:41:45,463 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.6 percent of original size [2021-06-05 14:41:45,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:41:45,468 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:554, output treesize:93 [2021-06-05 14:41:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:45,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612703689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:45,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:45,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:41:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889675434] [2021-06-05 14:41:45,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:45,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:45,627 INFO L87 Difference]: Start difference. First operand 716 states and 2267 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:46,698 INFO L93 Difference]: Finished difference Result 1121 states and 3478 transitions. [2021-06-05 14:41:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:41:46,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 23 [2021-06-05 14:41:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:46,700 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 14:41:46,700 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 14:41:46,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1069.0ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:41:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 14:41:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 726. [2021-06-05 14:41:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.169655172413793) internal successors, (2298), 725 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2298 transitions. [2021-06-05 14:41:46,708 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2298 transitions. Word has length 23 [2021-06-05 14:41:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:46,708 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2298 transitions. [2021-06-05 14:41:46,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2298 transitions. [2021-06-05 14:41:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:46,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:46,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:46,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:46,909 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash 620602170, now seen corresponding path program 222 times [2021-06-05 14:41:46,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:46,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985900048] [2021-06-05 14:41:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:47,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:47,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985900048] [2021-06-05 14:41:47,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985900048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:47,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362579109] [2021-06-05 14:41:47,048 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:47,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:41:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:47,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:47,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:47,208 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 4 treesize of output 2 [2021-06-05 14:41:47,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,280 INFO L628 ElimStorePlain]: treesize reduction 28, result has 76.3 percent of original size [2021-06-05 14:41:47,283 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 4 treesize of output 2 [2021-06-05 14:41:47,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,333 INFO L628 ElimStorePlain]: treesize reduction 22, result has 74.4 percent of original size [2021-06-05 14:41:47,333 INFO L518 ElimStorePlain]: Eliminatee v_prenex_114 vanished before elimination [2021-06-05 14:41:47,333 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:41:47,335 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 3 treesize of output 1 [2021-06-05 14:41:47,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:47,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:47,360 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:122, output treesize:61 [2021-06-05 14:41:47,484 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 3 treesize of output 1 [2021-06-05 14:41:47,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,488 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 4 treesize of output 2 [2021-06-05 14:41:47,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,492 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 4 treesize of output 2 [2021-06-05 14:41:47,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,498 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 4 treesize of output 2 [2021-06-05 14:41:47,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:47,505 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,508 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 4 treesize of output 2 [2021-06-05 14:41:47,509 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:47,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,515 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 3 treesize of output 1 [2021-06-05 14:41:47,516 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:47,597 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 4 treesize of output 2 [2021-06-05 14:41:47,598 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:47,669 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 4 treesize of output 2 [2021-06-05 14:41:47,669 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,672 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 3 treesize of output 1 [2021-06-05 14:41:47,673 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,676 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 4 treesize of output 2 [2021-06-05 14:41:47,677 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,679 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 3 treesize of output 1 [2021-06-05 14:41:47,680 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,796 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-05 14:41:47,796 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.5 percent of original size [2021-06-05 14:41:47,799 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 3 treesize of output 1 [2021-06-05 14:41:47,800 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:47,892 INFO L628 ElimStorePlain]: treesize reduction 28, result has 81.5 percent of original size [2021-06-05 14:41:47,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:47,895 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 5 variables, input treesize:269, output treesize:98 [2021-06-05 14:41:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:48,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362579109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:48,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:48,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:41:48,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793179211] [2021-06-05 14:41:48,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:48,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:48,045 INFO L87 Difference]: Start difference. First operand 726 states and 2298 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:48,835 INFO L93 Difference]: Finished difference Result 1248 states and 3824 transitions. [2021-06-05 14:41:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:41:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 23 [2021-06-05 14:41:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:48,837 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 14:41:48,837 INFO L226 Difference]: Without dead ends: 1158 [2021-06-05 14:41:48,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:41:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-05 14:41:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 736. [2021-06-05 14:41:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.182312925170068) internal successors, (2339), 735 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2339 transitions. [2021-06-05 14:41:48,845 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2339 transitions. Word has length 23 [2021-06-05 14:41:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:48,845 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2339 transitions. [2021-06-05 14:41:48,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2339 transitions. [2021-06-05 14:41:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:48,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:48,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:49,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3545 [2021-06-05 14:41:49,046 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:49,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2060798392, now seen corresponding path program 223 times [2021-06-05 14:41:49,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:49,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812405814] [2021-06-05 14:41:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:49,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:49,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812405814] [2021-06-05 14:41:49,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812405814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700993214] [2021-06-05 14:41:49,250 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:49,734 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_119], 1=[ends_with_2]} [2021-06-05 14:41:49,737 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 3 treesize of output 1 [2021-06-05 14:41:49,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:49,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,815 INFO L628 ElimStorePlain]: treesize reduction 180, result has 28.3 percent of original size [2021-06-05 14:41:49,817 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 4 treesize of output 2 [2021-06-05 14:41:49,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,852 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-05 14:41:49,854 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 4 treesize of output 2 [2021-06-05 14:41:49,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,857 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 3 treesize of output 1 [2021-06-05 14:41:49,858 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:49,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:49,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:41:49,872 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-05 14:41:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:49,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700993214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:49,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:49,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:41:49,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094253322] [2021-06-05 14:41:49,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:41:49,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:49,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:41:49,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:49,930 INFO L87 Difference]: Start difference. First operand 736 states and 2339 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:51,957 INFO L93 Difference]: Finished difference Result 1116 states and 3361 transitions. [2021-06-05 14:41:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:41:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:41:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:51,959 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 14:41:51,959 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 14:41:51,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1662.8ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:41:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 14:41:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 710. [2021-06-05 14:41:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.170662905500705) internal successors, (2248), 709 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2248 transitions. [2021-06-05 14:41:51,967 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2248 transitions. Word has length 23 [2021-06-05 14:41:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:51,967 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2248 transitions. [2021-06-05 14:41:51,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2248 transitions. [2021-06-05 14:41:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:51,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:51,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:52,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-05 14:41:52,168 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash -973949894, now seen corresponding path program 224 times [2021-06-05 14:41:52,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:52,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907205915] [2021-06-05 14:41:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:52,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:52,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907205915] [2021-06-05 14:41:52,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907205915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:52,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299515408] [2021-06-05 14:41:52,322 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:52,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:41:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:52,488 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 3 treesize of output 1 [2021-06-05 14:41:52,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:52,541 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-05 14:41:52,543 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 4 treesize of output 2 [2021-06-05 14:41:52,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:52,586 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-05 14:41:52,586 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-05 14:41:52,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:41:52,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:33 [2021-06-05 14:41:52,785 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_122, v_prenex_124, v_prenex_123, ends_with_10], 1=[ends_with_2]} [2021-06-05 14:41:52,790 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 3 treesize of output 1 [2021-06-05 14:41:52,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:52,795 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 3 treesize of output 1 [2021-06-05 14:41:52,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:52,959 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-05 14:41:52,960 INFO L628 ElimStorePlain]: treesize reduction 79, result has 69.0 percent of original size [2021-06-05 14:41:52,963 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 3 treesize of output 1 [2021-06-05 14:41:52,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,105 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 14:41:53,106 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.7 percent of original size [2021-06-05 14:41:53,109 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 4 treesize of output 2 [2021-06-05 14:41:53,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,229 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 14:41:53,230 INFO L628 ElimStorePlain]: treesize reduction 25, result has 84.8 percent of original size [2021-06-05 14:41:53,233 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 4 treesize of output 2 [2021-06-05 14:41:53,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,236 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 4 treesize of output 2 [2021-06-05 14:41:53,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,344 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 14:41:53,344 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 14:41:53,347 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 4 treesize of output 2 [2021-06-05 14:41:53,348 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,351 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 4 treesize of output 2 [2021-06-05 14:41:53,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,355 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 4 treesize of output 2 [2021-06-05 14:41:53,355 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,358 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 3 treesize of output 1 [2021-06-05 14:41:53,359 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:53,436 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-05 14:41:53,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:41:53,437 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:261, output treesize:57 [2021-06-05 14:41:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:53,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299515408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:53,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:53,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:41:53,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149834198] [2021-06-05 14:41:53,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:53,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:53,540 INFO L87 Difference]: Start difference. First operand 710 states and 2248 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:54,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:54,497 INFO L93 Difference]: Finished difference Result 1008 states and 3166 transitions. [2021-06-05 14:41:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:41:54,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 23 [2021-06-05 14:41:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:54,499 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 14:41:54,499 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 14:41:54,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:41:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 14:41:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 729. [2021-06-05 14:41:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.168956043956044) internal successors, (2307), 728 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2307 transitions. [2021-06-05 14:41:54,506 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2307 transitions. Word has length 23 [2021-06-05 14:41:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:54,507 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2307 transitions. [2021-06-05 14:41:54,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2307 transitions. [2021-06-05 14:41:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:54,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:54,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:54,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-05 14:41:54,708 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:54,708 INFO L82 PathProgramCache]: Analyzing trace with hash -25680630, now seen corresponding path program 225 times [2021-06-05 14:41:54,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:54,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165964151] [2021-06-05 14:41:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:54,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:54,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165964151] [2021-06-05 14:41:54,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165964151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:54,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492146581] [2021-06-05 14:41:54,867 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:54,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:41:54,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:54,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:55,043 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 3 treesize of output 1 [2021-06-05 14:41:55,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,048 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 3 treesize of output 1 [2021-06-05 14:41:55,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,125 INFO L628 ElimStorePlain]: treesize reduction 26, result has 76.6 percent of original size [2021-06-05 14:41:55,128 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 4 treesize of output 2 [2021-06-05 14:41:55,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,178 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.5 percent of original size [2021-06-05 14:41:55,178 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:41:55,180 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 4 treesize of output 2 [2021-06-05 14:41:55,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:55,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:55,205 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-05 14:41:55,341 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 3 treesize of output 1 [2021-06-05 14:41:55,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,345 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 4 treesize of output 2 [2021-06-05 14:41:55,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,349 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 3 treesize of output 1 [2021-06-05 14:41:55,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,353 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 3 treesize of output 1 [2021-06-05 14:41:55,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,357 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 4 treesize of output 2 [2021-06-05 14:41:55,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,361 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 4 treesize of output 2 [2021-06-05 14:41:55,362 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,365 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 4 treesize of output 2 [2021-06-05 14:41:55,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,369 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 4 treesize of output 2 [2021-06-05 14:41:55,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,373 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 4 treesize of output 2 [2021-06-05 14:41:55,374 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:55,378 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,522 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-05 14:41:55,523 INFO L628 ElimStorePlain]: treesize reduction 99, result has 64.0 percent of original size [2021-06-05 14:41:55,526 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 3 treesize of output 1 [2021-06-05 14:41:55,527 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,637 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-05 14:41:55,638 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.9 percent of original size [2021-06-05 14:41:55,641 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 3 treesize of output 1 [2021-06-05 14:41:55,641 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,644 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 4 treesize of output 2 [2021-06-05 14:41:55,645 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,647 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 4 treesize of output 2 [2021-06-05 14:41:55,648 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,651 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 3 treesize of output 1 [2021-06-05 14:41:55,651 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:55,743 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-06-05 14:41:55,743 INFO L518 ElimStorePlain]: Eliminatee v_prenex_129 vanished before elimination [2021-06-05 14:41:55,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:41:55,745 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 5 variables, input treesize:341, output treesize:98 [2021-06-05 14:41:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:55,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492146581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:55,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:55,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:41:55,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275818287] [2021-06-05 14:41:55,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:41:55,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:55,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:41:55,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:41:55,893 INFO L87 Difference]: Start difference. First operand 729 states and 2307 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:56,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:56,800 INFO L93 Difference]: Finished difference Result 1261 states and 3863 transitions. [2021-06-05 14:41:56,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:41:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 23 [2021-06-05 14:41:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:56,802 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 14:41:56,802 INFO L226 Difference]: Without dead ends: 1171 [2021-06-05 14:41:56,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 933.2ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:41:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-05 14:41:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 739. [2021-06-05 14:41:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.1815718157181574) internal successors, (2348), 738 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2348 transitions. [2021-06-05 14:41:56,810 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2348 transitions. Word has length 23 [2021-06-05 14:41:56,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:56,810 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2348 transitions. [2021-06-05 14:41:56,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:56,810 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2348 transitions. [2021-06-05 14:41:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:56,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:56,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:57,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3713,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:57,014 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:57,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1587886104, now seen corresponding path program 226 times [2021-06-05 14:41:57,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:57,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903705159] [2021-06-05 14:41:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:57,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:57,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903705159] [2021-06-05 14:41:57,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903705159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:57,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928321382] [2021-06-05 14:41:57,230 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:57,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:41:57,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:57,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:41:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:57,625 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_131, v_prenex_130], 1=[ends_with_6]} [2021-06-05 14:41:57,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:57,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,631 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 4 treesize of output 2 [2021-06-05 14:41:57,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,635 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 4 treesize of output 2 [2021-06-05 14:41:57,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,639 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 4 treesize of output 2 [2021-06-05 14:41:57,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:57,643 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:41:57,646 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,720 INFO L628 ElimStorePlain]: treesize reduction 117, result has 38.4 percent of original size [2021-06-05 14:41:57,723 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 3 treesize of output 1 [2021-06-05 14:41:57,724 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:57,752 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-06-05 14:41:57,755 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 4 treesize of output 2 [2021-06-05 14:41:57,756 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,758 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 3 treesize of output 1 [2021-06-05 14:41:57,759 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,761 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 4 treesize of output 2 [2021-06-05 14:41:57,762 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:57,806 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-06-05 14:41:57,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:41:57,808 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:293, output treesize:32 [2021-06-05 14:41:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:57,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928321382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:57,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:57,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 14:41:57,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807019129] [2021-06-05 14:41:57,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:41:57,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:41:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:41:57,874 INFO L87 Difference]: Start difference. First operand 739 states and 2348 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:41:58,795 INFO L93 Difference]: Finished difference Result 1121 states and 3462 transitions. [2021-06-05 14:41:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:41:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:41:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:41:58,797 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 14:41:58,797 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 14:41:58,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 973.8ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:41:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 14:41:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 751. [2021-06-05 14:41:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1973333333333334) internal successors, (2398), 750 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2398 transitions. [2021-06-05 14:41:58,805 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2398 transitions. Word has length 23 [2021-06-05 14:41:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:41:58,805 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2398 transitions. [2021-06-05 14:41:58,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:41:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2398 transitions. [2021-06-05 14:41:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:41:58,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:41:58,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:41:59,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:59,013 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:41:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:41:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1571783644, now seen corresponding path program 227 times [2021-06-05 14:41:59,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:41:59,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972298791] [2021-06-05 14:41:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:41:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:41:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:41:59,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:41:59,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972298791] [2021-06-05 14:41:59,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972298791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:59,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295863711] [2021-06-05 14:41:59,265 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:41:59,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:41:59,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:41:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:41:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:41:59,629 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_133, v_prenex_132, ends_with_6], 1=[ends_with_2]} [2021-06-05 14:41:59,632 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 4 treesize of output 2 [2021-06-05 14:41:59,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:59,636 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 4 treesize of output 2 [2021-06-05 14:41:59,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:59,726 INFO L628 ElimStorePlain]: treesize reduction 110, result has 47.4 percent of original size [2021-06-05 14:41:59,730 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 4 treesize of output 2 [2021-06-05 14:41:59,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:59,786 INFO L628 ElimStorePlain]: treesize reduction 24, result has 74.7 percent of original size [2021-06-05 14:41:59,790 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 3 treesize of output 1 [2021-06-05 14:41:59,791 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:59,835 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-05 14:41:59,838 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 4 treesize of output 2 [2021-06-05 14:41:59,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:59,840 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 3 treesize of output 1 [2021-06-05 14:41:59,841 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:41:59,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:41:59,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:41:59,856 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:217, output treesize:20 [2021-06-05 14:41:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:41:59,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295863711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:41:59,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:41:59,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:41:59,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543015743] [2021-06-05 14:41:59,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:41:59,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:41:59,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:41:59,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:41:59,940 INFO L87 Difference]: Start difference. First operand 751 states and 2398 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:02,710 INFO L93 Difference]: Finished difference Result 1322 states and 4005 transitions. [2021-06-05 14:42:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 14:42:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:02,712 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 14:42:02,712 INFO L226 Difference]: Without dead ends: 1229 [2021-06-05 14:42:02,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2365.6ms TimeCoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:42:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-06-05 14:42:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 750. [2021-06-05 14:42:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.184245660881175) internal successors, (2385), 749 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2385 transitions. [2021-06-05 14:42:02,720 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2385 transitions. Word has length 23 [2021-06-05 14:42:02,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:02,720 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2385 transitions. [2021-06-05 14:42:02,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2385 transitions. [2021-06-05 14:42:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:02,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:02,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:02,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:02,922 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1840314058, now seen corresponding path program 228 times [2021-06-05 14:42:02,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:02,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702160250] [2021-06-05 14:42:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:03,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:03,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702160250] [2021-06-05 14:42:03,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702160250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:03,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384710134] [2021-06-05 14:42:03,155 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:03,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:03,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:03,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:03,736 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_134, ends_with_6], 1=[ends_with_2]} [2021-06-05 14:42:03,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:03,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:03,744 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 3 treesize of output 1 [2021-06-05 14:42:03,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:03,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:03,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:03,887 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 14:42:03,887 INFO L628 ElimStorePlain]: treesize reduction 187, result has 43.7 percent of original size [2021-06-05 14:42:03,890 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 4 treesize of output 2 [2021-06-05 14:42:03,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:03,894 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 4 treesize of output 2 [2021-06-05 14:42:03,895 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:03,897 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 3 treesize of output 1 [2021-06-05 14:42:03,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:03,901 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 3 treesize of output 1 [2021-06-05 14:42:03,902 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:04,008 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-05 14:42:04,009 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-05 14:42:04,011 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 4 treesize of output 2 [2021-06-05 14:42:04,012 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:04,015 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 4 treesize of output 2 [2021-06-05 14:42:04,016 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:04,018 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 3 treesize of output 1 [2021-06-05 14:42:04,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:04,022 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 4 treesize of output 2 [2021-06-05 14:42:04,023 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:04,025 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 4 treesize of output 2 [2021-06-05 14:42:04,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:04,114 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 14:42:04,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:42:04,116 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:395, output treesize:65 [2021-06-05 14:42:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:04,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384710134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:04,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:04,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:42:04,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152557214] [2021-06-05 14:42:04,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:42:04,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:04,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:42:04,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:04,244 INFO L87 Difference]: Start difference. First operand 750 states and 2385 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:06,257 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 14:42:07,539 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 14:42:08,252 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 14:42:08,883 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 14:42:09,041 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-05 14:42:09,260 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-05 14:42:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:09,695 INFO L93 Difference]: Finished difference Result 1854 states and 5388 transitions. [2021-06-05 14:42:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 14:42:09,695 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:09,697 INFO L225 Difference]: With dead ends: 1854 [2021-06-05 14:42:09,697 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 14:42:09,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 4615.9ms TimeCoverageRelationStatistics Valid=659, Invalid=5041, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 14:42:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 14:42:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 812. [2021-06-05 14:42:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.256473489519112) internal successors, (2641), 811 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2641 transitions. [2021-06-05 14:42:09,709 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2641 transitions. Word has length 23 [2021-06-05 14:42:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:09,709 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2641 transitions. [2021-06-05 14:42:09,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2641 transitions. [2021-06-05 14:42:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:09,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:09,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:09,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-06-05 14:42:09,910 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash -335500874, now seen corresponding path program 229 times [2021-06-05 14:42:09,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:09,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330024055] [2021-06-05 14:42:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:10,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330024055] [2021-06-05 14:42:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330024055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545291134] [2021-06-05 14:42:10,157 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:42:10,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:10,719 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_135, ends_with_6], 1=[ends_with_2]} [2021-06-05 14:42:10,722 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 3 treesize of output 1 [2021-06-05 14:42:10,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:10,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:10,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:10,796 INFO L628 ElimStorePlain]: treesize reduction 239, result has 22.9 percent of original size [2021-06-05 14:42:10,799 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 4 treesize of output 2 [2021-06-05 14:42:10,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:10,834 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-05 14:42:10,837 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 3 treesize of output 1 [2021-06-05 14:42:10,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:10,839 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 4 treesize of output 2 [2021-06-05 14:42:10,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:10,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:10,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:10,854 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:337, output treesize:20 [2021-06-05 14:42:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545291134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:10,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:10,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:42:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482358378] [2021-06-05 14:42:10,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:42:10,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:10,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:42:10,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:10,908 INFO L87 Difference]: Start difference. First operand 812 states and 2641 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:12,305 INFO L93 Difference]: Finished difference Result 1104 states and 3428 transitions. [2021-06-05 14:42:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:42:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:12,307 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 14:42:12,307 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 14:42:12,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1279.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:42:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 14:42:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 828. [2021-06-05 14:42:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.259975816203144) internal successors, (2696), 827 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2696 transitions. [2021-06-05 14:42:12,316 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2696 transitions. Word has length 23 [2021-06-05 14:42:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:12,316 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2696 transitions. [2021-06-05 14:42:12,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:12,316 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2696 transitions. [2021-06-05 14:42:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:12,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:12,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:12,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3953 [2021-06-05 14:42:12,517 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:12,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1570469962, now seen corresponding path program 230 times [2021-06-05 14:42:12,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:12,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702583546] [2021-06-05 14:42:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:12,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:12,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702583546] [2021-06-05 14:42:12,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702583546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:12,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298363569] [2021-06-05 14:42:12,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:12,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:12,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:12,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:12,815 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 3 treesize of output 1 [2021-06-05 14:42:12,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:12,902 INFO L628 ElimStorePlain]: treesize reduction 28, result has 78.8 percent of original size [2021-06-05 14:42:12,902 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 14:42:12,905 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 3 treesize of output 1 [2021-06-05 14:42:12,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:12,984 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:42:12,987 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 4 treesize of output 2 [2021-06-05 14:42:12,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,047 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-05 14:42:13,050 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 4 treesize of output 2 [2021-06-05 14:42:13,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:13,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:42:13,080 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:135, output treesize:59 [2021-06-05 14:42:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:13,505 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 7 treesize of output 1 [2021-06-05 14:42:13,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:13,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:13,514 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 8 treesize of output 1 [2021-06-05 14:42:13,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:13,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:13,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,628 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-05 14:42:13,628 INFO L628 ElimStorePlain]: treesize reduction 104, result has 50.0 percent of original size [2021-06-05 14:42:13,631 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 4 treesize of output 2 [2021-06-05 14:42:13,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,634 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 4 treesize of output 2 [2021-06-05 14:42:13,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:13,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:13,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:42:13,681 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-05 14:42:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:42:13,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298363569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:13,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:13,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:42:13,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614894462] [2021-06-05 14:42:13,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:42:13,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:13,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:42:13,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:13,825 INFO L87 Difference]: Start difference. First operand 828 states and 2696 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:15,403 INFO L93 Difference]: Finished difference Result 1373 states and 4181 transitions. [2021-06-05 14:42:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:42:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:15,405 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 14:42:15,405 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 14:42:15,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1265.5ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:42:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 14:42:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 850. [2021-06-05 14:42:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.270906949352179) internal successors, (2777), 849 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2777 transitions. [2021-06-05 14:42:15,415 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2777 transitions. Word has length 23 [2021-06-05 14:42:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:15,415 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2777 transitions. [2021-06-05 14:42:15,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2777 transitions. [2021-06-05 14:42:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:15,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:15,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:15,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,617 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1231172060, now seen corresponding path program 231 times [2021-06-05 14:42:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:15,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873861162] [2021-06-05 14:42:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:15,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873861162] [2021-06-05 14:42:15,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873861162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972171404] [2021-06-05 14:42:15,777 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:15,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:15,952 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 4 treesize of output 2 [2021-06-05 14:42:15,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:15,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:15,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:15,959 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 3 treesize of output 1 [2021-06-05 14:42:15,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,040 INFO L628 ElimStorePlain]: treesize reduction 10, result has 90.9 percent of original size [2021-06-05 14:42:16,043 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 3 treesize of output 1 [2021-06-05 14:42:16,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,092 INFO L628 ElimStorePlain]: treesize reduction 41, result has 57.7 percent of original size [2021-06-05 14:42:16,093 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:42:16,093 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 14:42:16,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:42:16,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-05 14:42:16,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,392 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 9 treesize of output 2 [2021-06-05 14:42:16,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,396 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 8 treesize of output 1 [2021-06-05 14:42:16,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:16,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,406 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 8 treesize of output 1 [2021-06-05 14:42:16,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:16,409 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 9 treesize of output 2 [2021-06-05 14:42:16,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:16,465 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-05 14:42:16,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:42:16,466 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-05 14:42:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:42:16,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972171404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:16,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:16,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 14:42:16,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499252852] [2021-06-05 14:42:16,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:16,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:16,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:16,547 INFO L87 Difference]: Start difference. First operand 850 states and 2777 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:17,588 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-05 14:42:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:18,128 INFO L93 Difference]: Finished difference Result 1420 states and 4421 transitions. [2021-06-05 14:42:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:42:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:18,130 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 14:42:18,130 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 14:42:18,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1645.6ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:42:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 14:42:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 871. [2021-06-05 14:42:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.264367816091954) internal successors, (2840), 870 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2840 transitions. [2021-06-05 14:42:18,140 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2840 transitions. Word has length 23 [2021-06-05 14:42:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:18,140 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2840 transitions. [2021-06-05 14:42:18,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2840 transitions. [2021-06-05 14:42:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:18,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:18,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:18,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-05 14:42:18,342 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:18,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1298345444, now seen corresponding path program 232 times [2021-06-05 14:42:18,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:18,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347044002] [2021-06-05 14:42:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:18,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:18,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347044002] [2021-06-05 14:42:18,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347044002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:18,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228369706] [2021-06-05 14:42:18,481 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:18,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:18,649 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 3 treesize of output 1 [2021-06-05 14:42:18,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:18,711 INFO L628 ElimStorePlain]: treesize reduction 74, result has 47.5 percent of original size [2021-06-05 14:42:18,713 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 3 treesize of output 1 [2021-06-05 14:42:18,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:18,716 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 4 treesize of output 2 [2021-06-05 14:42:18,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:18,763 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-05 14:42:18,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-06-05 14:42:18,763 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:42:18,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:42:18,765 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-05 14:42:19,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,310 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 9 treesize of output 2 [2021-06-05 14:42:19,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,315 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 8 treesize of output 1 [2021-06-05 14:42:19,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,320 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 9 treesize of output 2 [2021-06-05 14:42:19,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:19,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:19,324 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,452 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 14:42:19,453 INFO L628 ElimStorePlain]: treesize reduction 105, result has 54.1 percent of original size [2021-06-05 14:42:19,456 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 4 treesize of output 2 [2021-06-05 14:42:19,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,459 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 4 treesize of output 2 [2021-06-05 14:42:19,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:19,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:19,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:42:19,516 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-05 14:42:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:42:19,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228369706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:19,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:19,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 14:42:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35528621] [2021-06-05 14:42:19,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:19,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:19,680 INFO L87 Difference]: Start difference. First operand 871 states and 2840 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:22,375 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 14:42:22,504 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 14:42:22,636 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 14:42:23,146 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 14:42:23,288 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 14:42:23,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:23,308 INFO L93 Difference]: Finished difference Result 1820 states and 5668 transitions. [2021-06-05 14:42:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:42:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:23,310 INFO L225 Difference]: With dead ends: 1820 [2021-06-05 14:42:23,310 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 14:42:23,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 3561.4ms TimeCoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:42:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 14:42:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 881. [2021-06-05 14:42:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.2738636363636364) internal successors, (2881), 880 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2881 transitions. [2021-06-05 14:42:23,321 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2881 transitions. Word has length 23 [2021-06-05 14:42:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:23,321 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2881 transitions. [2021-06-05 14:42:23,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2881 transitions. [2021-06-05 14:42:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:23,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:23,322 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:23,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:23,523 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash -101275790, now seen corresponding path program 233 times [2021-06-05 14:42:23,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:23,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501605032] [2021-06-05 14:42:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:23,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501605032] [2021-06-05 14:42:23,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501605032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:23,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479107114] [2021-06-05 14:42:23,594 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:23,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:23,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:23,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:23,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:23,769 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 3 treesize of output 1 [2021-06-05 14:42:23,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:23,772 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 4 treesize of output 2 [2021-06-05 14:42:23,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:23,776 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 4 treesize of output 2 [2021-06-05 14:42:23,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:23,844 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-05 14:42:23,847 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 4 treesize of output 2 [2021-06-05 14:42:23,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:23,894 INFO L628 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2021-06-05 14:42:23,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-06-05 14:42:23,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 14:42:23,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-05 14:42:24,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:24,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:24,208 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 8 treesize of output 1 [2021-06-05 14:42:24,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:24,212 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 8 treesize of output 1 [2021-06-05 14:42:24,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:24,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:24,216 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 9 treesize of output 2 [2021-06-05 14:42:24,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:24,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:24,220 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 9 treesize of output 2 [2021-06-05 14:42:24,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:24,282 INFO L628 ElimStorePlain]: treesize reduction 79, result has 42.3 percent of original size [2021-06-05 14:42:24,284 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 3 treesize of output 1 [2021-06-05 14:42:24,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:24,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:24,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:24,310 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-05 14:42:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:24,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479107114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:24,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:24,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:42:24,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770707628] [2021-06-05 14:42:24,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:24,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:24,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:24,373 INFO L87 Difference]: Start difference. First operand 881 states and 2881 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:24,848 INFO L93 Difference]: Finished difference Result 1350 states and 4249 transitions. [2021-06-05 14:42:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:42:24,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 23 [2021-06-05 14:42:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:24,849 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 14:42:24,849 INFO L226 Difference]: Without dead ends: 1305 [2021-06-05 14:42:24,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:42:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-05 14:42:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 896. [2021-06-05 14:42:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.275977653631285) internal successors, (2932), 895 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2932 transitions. [2021-06-05 14:42:24,860 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2932 transitions. Word has length 23 [2021-06-05 14:42:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:24,860 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2932 transitions. [2021-06-05 14:42:24,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2932 transitions. [2021-06-05 14:42:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:24,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:24,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:25,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-06-05 14:42:25,065 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:25,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:25,065 INFO L82 PathProgramCache]: Analyzing trace with hash 54833778, now seen corresponding path program 234 times [2021-06-05 14:42:25,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:25,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886538888] [2021-06-05 14:42:25,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:25,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886538888] [2021-06-05 14:42:25,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886538888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48329274] [2021-06-05 14:42:25,352 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:25,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:25,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:42:25,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:25,779 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_156, ends_with_10], 1=[ends_with_6]} [2021-06-05 14:42:25,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,791 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 4 treesize of output 2 [2021-06-05 14:42:25,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,795 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 4 treesize of output 2 [2021-06-05 14:42:25,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,799 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 4 treesize of output 2 [2021-06-05 14:42:25,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,807 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 3 treesize of output 1 [2021-06-05 14:42:25,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,812 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,815 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,818 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,822 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,839 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 4 treesize of output 2 [2021-06-05 14:42:25,840 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,845 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:25,849 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,852 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 4 treesize of output 2 [2021-06-05 14:42:25,853 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:25,961 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-06-05 14:42:25,961 INFO L628 ElimStorePlain]: treesize reduction 135, result has 46.9 percent of original size [2021-06-05 14:42:25,965 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 3 treesize of output 1 [2021-06-05 14:42:25,966 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:26,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:26,033 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 3 treesize of output 1 [2021-06-05 14:42:26,034 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:26,036 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 4 treesize of output 2 [2021-06-05 14:42:26,037 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:26,039 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 4 treesize of output 2 [2021-06-05 14:42:26,040 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:26,091 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-06-05 14:42:26,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:26,092 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 4 variables, input treesize:581, output treesize:35 [2021-06-05 14:42:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:26,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48329274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:26,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:26,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:42:26,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777070602] [2021-06-05 14:42:26,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:42:26,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:26,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:42:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:26,190 INFO L87 Difference]: Start difference. First operand 896 states and 2932 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:26,361 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 14:42:26,520 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:42:26,655 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 14:42:26,843 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 14:42:27,035 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 14:42:27,336 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-05 14:42:27,542 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 14:42:28,156 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 14:42:29,613 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 14:42:30,209 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 14:42:30,819 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 14:42:31,661 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-05 14:42:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:31,671 INFO L93 Difference]: Finished difference Result 2106 states and 6396 transitions. [2021-06-05 14:42:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 14:42:31,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 23 [2021-06-05 14:42:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:31,674 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 14:42:31,674 INFO L226 Difference]: Without dead ends: 1979 [2021-06-05 14:42:31,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 4933.3ms TimeCoverageRelationStatistics Valid=787, Invalid=5533, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 14:42:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-06-05 14:42:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 944. [2021-06-05 14:42:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.291622481442206) internal successors, (3104), 943 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3104 transitions. [2021-06-05 14:42:31,687 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3104 transitions. Word has length 23 [2021-06-05 14:42:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:31,687 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 3104 transitions. [2021-06-05 14:42:31,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3104 transitions. [2021-06-05 14:42:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:31,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:31,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:31,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:31,888 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:31,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1457185666, now seen corresponding path program 235 times [2021-06-05 14:42:31,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:31,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205189862] [2021-06-05 14:42:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:32,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205189862] [2021-06-05 14:42:32,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205189862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373457661] [2021-06-05 14:42:32,092 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:32,512 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_157, v_prenex_159, v_prenex_158, ends_with_10], 1=[ends_with_6]} [2021-06-05 14:42:32,515 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 3 treesize of output 1 [2021-06-05 14:42:32,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:32,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:32,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:32,599 INFO L628 ElimStorePlain]: treesize reduction 178, result has 31.0 percent of original size [2021-06-05 14:42:32,602 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 4 treesize of output 2 [2021-06-05 14:42:32,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:32,661 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.7 percent of original size [2021-06-05 14:42:32,663 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 3 treesize of output 1 [2021-06-05 14:42:32,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:32,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:32,692 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:42:32,694 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 4 treesize of output 2 [2021-06-05 14:42:32,695 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:32,698 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 3 treesize of output 1 [2021-06-05 14:42:32,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:32,700 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 4 treesize of output 2 [2021-06-05 14:42:32,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:32,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:32,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:32,726 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:288, output treesize:35 [2021-06-05 14:42:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:32,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373457661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:32,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:32,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:42:32,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29922732] [2021-06-05 14:42:32,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:42:32,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:42:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:42:32,789 INFO L87 Difference]: Start difference. First operand 944 states and 3104 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:34,377 INFO L93 Difference]: Finished difference Result 1399 states and 4433 transitions. [2021-06-05 14:42:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:42:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 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 23 [2021-06-05 14:42:34,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:34,380 INFO L225 Difference]: With dead ends: 1399 [2021-06-05 14:42:34,380 INFO L226 Difference]: Without dead ends: 1345 [2021-06-05 14:42:34,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1329.7ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:42:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-06-05 14:42:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 928. [2021-06-05 14:42:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.2837108953613807) internal successors, (3044), 927 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3044 transitions. [2021-06-05 14:42:34,391 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3044 transitions. Word has length 23 [2021-06-05 14:42:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:34,391 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3044 transitions. [2021-06-05 14:42:34,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3044 transitions. [2021-06-05 14:42:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:34,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:34,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:34,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-06-05 14:42:34,592 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:34,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:34,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1635109126, now seen corresponding path program 236 times [2021-06-05 14:42:34,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:34,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289859991] [2021-06-05 14:42:34,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:34,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:34,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289859991] [2021-06-05 14:42:34,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289859991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:34,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745127805] [2021-06-05 14:42:34,702 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:34,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:34,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:34,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:35,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745127805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:35,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:35,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:42:35,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351205152] [2021-06-05 14:42:35,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:42:35,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:35,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:42:35,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:42:35,071 INFO L87 Difference]: Start difference. First operand 928 states and 3044 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:36,068 INFO L93 Difference]: Finished difference Result 1707 states and 5349 transitions. [2021-06-05 14:42:36,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:42:36,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 23 [2021-06-05 14:42:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:36,071 INFO L225 Difference]: With dead ends: 1707 [2021-06-05 14:42:36,071 INFO L226 Difference]: Without dead ends: 1617 [2021-06-05 14:42:36,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1035.9ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:42:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-06-05 14:42:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 952. [2021-06-05 14:42:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.305993690851735) internal successors, (3144), 951 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3144 transitions. [2021-06-05 14:42:36,083 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3144 transitions. Word has length 23 [2021-06-05 14:42:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:36,083 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3144 transitions. [2021-06-05 14:42:36,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3144 transitions. [2021-06-05 14:42:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:36,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:36,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:36,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:36,285 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:36,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2049337868, now seen corresponding path program 237 times [2021-06-05 14:42:36,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:36,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574215146] [2021-06-05 14:42:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:36,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:36,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574215146] [2021-06-05 14:42:36,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574215146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:36,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661688318] [2021-06-05 14:42:36,456 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:36,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:42:36,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:42:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:36,650 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 3 treesize of output 1 [2021-06-05 14:42:36,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,703 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-05 14:42:36,703 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-05 14:42:36,705 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 4 treesize of output 2 [2021-06-05 14:42:36,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:36,739 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-05 14:42:36,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:42:36,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:30 [2021-06-05 14:42:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:37,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661688318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:37,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:37,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 14:42:37,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450537817] [2021-06-05 14:42:37,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:42:37,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:37,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:42:37,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:42:37,016 INFO L87 Difference]: Start difference. First operand 952 states and 3144 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:37,892 INFO L93 Difference]: Finished difference Result 1367 states and 4382 transitions. [2021-06-05 14:42:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:42:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 23 [2021-06-05 14:42:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:37,894 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 14:42:37,894 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 14:42:37,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:42:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 14:42:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 974. [2021-06-05 14:42:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.3072970195272355) internal successors, (3218), 973 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3218 transitions. [2021-06-05 14:42:37,904 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3218 transitions. Word has length 23 [2021-06-05 14:42:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:37,904 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 3218 transitions. [2021-06-05 14:42:37,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3218 transitions. [2021-06-05 14:42:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:37,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:37,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:38,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4631,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,106 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash -344567604, now seen corresponding path program 238 times [2021-06-05 14:42:38,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:38,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585027077] [2021-06-05 14:42:38,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:38,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585027077] [2021-06-05 14:42:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585027077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177889239] [2021-06-05 14:42:38,205 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:38,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:38,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:38,358 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 4 treesize of output 2 [2021-06-05 14:42:38,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,362 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 3 treesize of output 1 [2021-06-05 14:42:38,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,365 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 4 treesize of output 2 [2021-06-05 14:42:38,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,434 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-05 14:42:38,437 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 3 treesize of output 1 [2021-06-05 14:42:38,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:38,472 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 4 treesize of output 2 [2021-06-05 14:42:38,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,520 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 14:42:38,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 14:42:38,523 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-05 14:42:38,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:38,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:38,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:42:38,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:38,846 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 7 treesize of output 1 [2021-06-05 14:42:38,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:38,851 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 8 treesize of output 1 [2021-06-05 14:42:38,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:38,854 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 7 treesize of output 1 [2021-06-05 14:42:38,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,923 INFO L628 ElimStorePlain]: treesize reduction 84, result has 42.9 percent of original size [2021-06-05 14:42:38,925 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 4 treesize of output 2 [2021-06-05 14:42:38,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,928 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 4 treesize of output 2 [2021-06-05 14:42:38,929 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:38,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:38,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:42:38,955 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:209, output treesize:33 [2021-06-05 14:42:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:39,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177889239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:39,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:39,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:42:39,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459977513] [2021-06-05 14:42:39,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:39,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:39,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:39,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:39,020 INFO L87 Difference]: Start difference. First operand 974 states and 3218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:39,599 INFO L93 Difference]: Finished difference Result 1750 states and 5441 transitions. [2021-06-05 14:42:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:42:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 23 [2021-06-05 14:42:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:39,602 INFO L225 Difference]: With dead ends: 1750 [2021-06-05 14:42:39,602 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 14:42:39,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 675.8ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:42:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 14:42:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 992. [2021-06-05 14:42:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-05 14:42:39,614 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-05 14:42:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:39,614 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-05 14:42:39,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-05 14:42:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:39,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:39,616 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:39,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4687,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:39,820 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash -545544782, now seen corresponding path program 239 times [2021-06-05 14:42:39,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:39,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179988321] [2021-06-05 14:42:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:39,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:39,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179988321] [2021-06-05 14:42:39,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179988321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:39,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315161173] [2021-06-05 14:42:39,909 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:40,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:42:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:42:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-05 14:42:40,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,176 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-05 14:42:40,180 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 4 treesize of output 2 [2021-06-05 14:42:40,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,246 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-05 14:42:40,249 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 3 treesize of output 1 [2021-06-05 14:42:40,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:40,277 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 4 treesize of output 2 [2021-06-05 14:42:40,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:42:40,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:42:40,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:53 [2021-06-05 14:42:40,610 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 3 treesize of output 1 [2021-06-05 14:42:40,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:40,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:40,614 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 7 treesize of output 1 [2021-06-05 14:42:40,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:40,617 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 8 treesize of output 1 [2021-06-05 14:42:40,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:40,640 INFO L628 ElimStorePlain]: treesize reduction 20, result has 56.5 percent of original size [2021-06-05 14:42:40,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:42:40,641 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:77, output treesize:20 [2021-06-05 14:42:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:40,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315161173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:40,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:40,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:42:40,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980032046] [2021-06-05 14:42:40,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:42:40,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:40,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:42:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:42:40,691 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:40,972 INFO L93 Difference]: Finished difference Result 1547 states and 4889 transitions. [2021-06-05 14:42:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:42:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 23 [2021-06-05 14:42:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:40,976 INFO L225 Difference]: With dead ends: 1547 [2021-06-05 14:42:40,976 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 14:42:40,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 14:42:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 992. [2021-06-05 14:42:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-05 14:42:40,999 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-05 14:42:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:40,999 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-05 14:42:40,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-05 14:42:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:41,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:41,000 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:41,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4734,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:41,204 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:41,205 INFO L82 PathProgramCache]: Analyzing trace with hash 191678748, now seen corresponding path program 240 times [2021-06-05 14:42:41,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:41,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520754015] [2021-06-05 14:42:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:41,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:41,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520754015] [2021-06-05 14:42:41,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520754015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:41,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797876542] [2021-06-05 14:42:41,412 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:41,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:42:41,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:42:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:41,604 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 4 treesize of output 2 [2021-06-05 14:42:41,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,608 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 4 treesize of output 2 [2021-06-05 14:42:41,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,611 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 4 treesize of output 2 [2021-06-05 14:42:41,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:41,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,666 INFO L628 ElimStorePlain]: treesize reduction 54, result has 53.0 percent of original size [2021-06-05 14:42:41,668 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 3 treesize of output 1 [2021-06-05 14:42:41,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,701 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 14:42:41,701 INFO L518 ElimStorePlain]: Eliminatee v_prenex_172 vanished before elimination [2021-06-05 14:42:41,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:42:41,702 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:154, output treesize:30 [2021-06-05 14:42:41,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,940 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 8 treesize of output 1 [2021-06-05 14:42:41,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,944 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 8 treesize of output 1 [2021-06-05 14:42:41,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:42:41,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:41,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:42:41,951 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 9 treesize of output 2 [2021-06-05 14:42:41,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:42,011 INFO L628 ElimStorePlain]: treesize reduction 32, result has 66.3 percent of original size [2021-06-05 14:42:42,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:42:42,012 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:47 [2021-06-05 14:42:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:42:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797876542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:42,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:42,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:42:42,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425618794] [2021-06-05 14:42:42,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:42,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:42,135 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:42,249 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 14:42:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:44,814 INFO L93 Difference]: Finished difference Result 1786 states and 5586 transitions. [2021-06-05 14:42:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 14:42:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:44,817 INFO L225 Difference]: With dead ends: 1786 [2021-06-05 14:42:44,817 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 14:42:44,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2356.5ms TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 14:42:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 14:42:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1009. [2021-06-05 14:42:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.3055555555555554) internal successors, (3332), 1008 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3332 transitions. [2021-06-05 14:42:44,829 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3332 transitions. Word has length 23 [2021-06-05 14:42:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:44,829 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 3332 transitions. [2021-06-05 14:42:44,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3332 transitions. [2021-06-05 14:42:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:44,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:44,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:45,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:45,031 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:45,031 INFO L82 PathProgramCache]: Analyzing trace with hash -345814108, now seen corresponding path program 241 times [2021-06-05 14:42:45,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:45,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749598085] [2021-06-05 14:42:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:45,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749598085] [2021-06-05 14:42:45,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749598085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130368513] [2021-06-05 14:42:45,300 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:45,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:42:45,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130368513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:45,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:45,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 14:42:45,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745078251] [2021-06-05 14:42:45,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:42:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:42:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:45,657 INFO L87 Difference]: Start difference. First operand 1009 states and 3332 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:45,881 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 14:42:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:47,929 INFO L93 Difference]: Finished difference Result 1485 states and 4760 transitions. [2021-06-05 14:42:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:42:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:47,931 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 14:42:47,931 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 14:42:47,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1942.5ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:42:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 14:42:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1033. [2021-06-05 14:42:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.302325581395349) internal successors, (3408), 1032 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3408 transitions. [2021-06-05 14:42:47,943 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3408 transitions. Word has length 23 [2021-06-05 14:42:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:47,943 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3408 transitions. [2021-06-05 14:42:47,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3408 transitions. [2021-06-05 14:42:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:47,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:47,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:48,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4895,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:48,145 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash 602455156, now seen corresponding path program 242 times [2021-06-05 14:42:48,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:48,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583749571] [2021-06-05 14:42:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:48,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:48,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583749571] [2021-06-05 14:42:48,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583749571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:48,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571952156] [2021-06-05 14:42:48,374 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:48,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:42:48,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:48,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:48,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571952156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:48,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:48,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 14:42:48,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446053059] [2021-06-05 14:42:48,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:42:48,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:42:48,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:42:48,790 INFO L87 Difference]: Start difference. First operand 1033 states and 3408 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:53,361 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-05 14:42:53,915 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-06-05 14:42:54,369 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-06-05 14:42:55,088 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-06-05 14:42:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:55,224 INFO L93 Difference]: Finished difference Result 2426 states and 7114 transitions. [2021-06-05 14:42:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 14:42:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:55,227 INFO L225 Difference]: With dead ends: 2426 [2021-06-05 14:42:55,227 INFO L226 Difference]: Without dead ends: 2105 [2021-06-05 14:42:55,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4198 ImplicationChecksByTransitivity, 5183.2ms TimeCoverageRelationStatistics Valid=895, Invalid=11095, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 14:42:55,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-05 14:42:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1097. [2021-06-05 14:42:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 3.31478102189781) internal successors, (3633), 1096 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 3633 transitions. [2021-06-05 14:42:55,244 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 3633 transitions. Word has length 23 [2021-06-05 14:42:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:55,244 INFO L482 AbstractCegarLoop]: Abstraction has 1097 states and 3633 transitions. [2021-06-05 14:42:55,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 3633 transitions. [2021-06-05 14:42:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:55,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:55,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:55,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-06-05 14:42:55,446 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash 298857606, now seen corresponding path program 243 times [2021-06-05 14:42:55,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:55,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033407496] [2021-06-05 14:42:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:55,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:55,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033407496] [2021-06-05 14:42:55,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033407496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:55,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364248052] [2021-06-05 14:42:55,603 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:55,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:42:55,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:42:55,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:55,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:42:55,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:55,785 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 4 treesize of output 2 [2021-06-05 14:42:55,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:55,788 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 4 treesize of output 2 [2021-06-05 14:42:55,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:55,838 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 14:42:55,840 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 3 treesize of output 1 [2021-06-05 14:42:55,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:42:55,873 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 14:42:55,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:42:55,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:30 [2021-06-05 14:42:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:56,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364248052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:56,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:56,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:42:56,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262987373] [2021-06-05 14:42:56,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:42:56,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:42:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:42:56,138 INFO L87 Difference]: Start difference. First operand 1097 states and 3633 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:42:57,874 INFO L93 Difference]: Finished difference Result 1772 states and 5608 transitions. [2021-06-05 14:42:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:42:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:42:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:42:57,876 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 14:42:57,876 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 14:42:57,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1339.8ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:42:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 14:42:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1102. [2021-06-05 14:42:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.31244323342416) internal successors, (3647), 1101 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3647 transitions. [2021-06-05 14:42:57,890 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3647 transitions. Word has length 23 [2021-06-05 14:42:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:42:57,890 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3647 transitions. [2021-06-05 14:42:57,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3647 transitions. [2021-06-05 14:42:57,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:42:57,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:42:57,891 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:42:58,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-06-05 14:42:58,091 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:42:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:42:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1212178272, now seen corresponding path program 244 times [2021-06-05 14:42:58,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:42:58,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328995441] [2021-06-05 14:42:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:42:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:42:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:42:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328995441] [2021-06-05 14:42:58,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328995441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604000328] [2021-06-05 14:42:58,426 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:42:58,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:42:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:42:58,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:42:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:42:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:42:58,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604000328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:42:58,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:42:58,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:42:58,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927753962] [2021-06-05 14:42:58,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:42:58,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:42:58,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:42:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:42:58,873 INFO L87 Difference]: Start difference. First operand 1102 states and 3647 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:42:59,225 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 14:42:59,771 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-05 14:43:01,459 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-05 14:43:02,351 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 14:43:03,003 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 14:43:03,727 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-05 14:43:04,007 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 14:43:04,276 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 14:43:04,688 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 14:43:05,306 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-05 14:43:05,627 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-05 14:43:05,930 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 14:43:06,259 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-05 14:43:06,806 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-05 14:43:07,052 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 14:43:07,607 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-05 14:43:08,247 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 14:43:08,404 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 14:43:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:08,406 INFO L93 Difference]: Finished difference Result 2858 states and 8256 transitions. [2021-06-05 14:43:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 14:43:08,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:08,410 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 14:43:08,410 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 14:43:08,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5806 ImplicationChecksByTransitivity, 8306.3ms TimeCoverageRelationStatistics Valid=1328, Invalid=15184, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 14:43:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 14:43:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1160. [2021-06-05 14:43:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.3339085418464194) internal successors, (3864), 1159 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3864 transitions. [2021-06-05 14:43:08,428 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3864 transitions. Word has length 23 [2021-06-05 14:43:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:08,428 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3864 transitions. [2021-06-05 14:43:08,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3864 transitions. [2021-06-05 14:43:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:08,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:08,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:08,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:08,629 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:08,630 INFO L82 PathProgramCache]: Analyzing trace with hash -235280272, now seen corresponding path program 245 times [2021-06-05 14:43:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:08,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848218721] [2021-06-05 14:43:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:08,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:08,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848218721] [2021-06-05 14:43:08,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848218721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:08,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087914038] [2021-06-05 14:43:08,816 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:08,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:43:08,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:09,013 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 4 treesize of output 2 [2021-06-05 14:43:09,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,117 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-05 14:43:09,117 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-05 14:43:09,121 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 4 treesize of output 2 [2021-06-05 14:43:09,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:09,175 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 3 treesize of output 1 [2021-06-05 14:43:09,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,178 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 3 treesize of output 1 [2021-06-05 14:43:09,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,236 INFO L628 ElimStorePlain]: treesize reduction 49, result has 57.0 percent of original size [2021-06-05 14:43:09,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_174 vanished before elimination [2021-06-05 14:43:09,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:43:09,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-05 14:43:09,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,764 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 9 treesize of output 2 [2021-06-05 14:43:09,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,771 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 8 treesize of output 1 [2021-06-05 14:43:09,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,778 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 8 treesize of output 1 [2021-06-05 14:43:09,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,784 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 9 treesize of output 2 [2021-06-05 14:43:09,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:09,789 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 9 treesize of output 2 [2021-06-05 14:43:09,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,963 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-05 14:43:09,964 INFO L628 ElimStorePlain]: treesize reduction 153, result has 44.8 percent of original size [2021-06-05 14:43:09,968 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 4 treesize of output 2 [2021-06-05 14:43:09,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:09,972 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 4 treesize of output 2 [2021-06-05 14:43:09,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:10,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:10,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:43:10,047 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:363, output treesize:80 [2021-06-05 14:43:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:10,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087914038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:10,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:10,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:43:10,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081081903] [2021-06-05 14:43:10,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:43:10,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:10,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:43:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:10,198 INFO L87 Difference]: Start difference. First operand 1160 states and 3864 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:11,216 INFO L93 Difference]: Finished difference Result 1864 states and 5964 transitions. [2021-06-05 14:43:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:43:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:11,219 INFO L225 Difference]: With dead ends: 1864 [2021-06-05 14:43:11,219 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 14:43:11,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1041.5ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:43:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 14:43:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1159. [2021-06-05 14:43:11,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.3367875647668392) internal successors, (3864), 1158 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 3864 transitions. [2021-06-05 14:43:11,232 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 3864 transitions. Word has length 23 [2021-06-05 14:43:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:11,233 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 3864 transitions. [2021-06-05 14:43:11,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 3864 transitions. [2021-06-05 14:43:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:11,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:11,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:11,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:11,434 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:11,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash -602834382, now seen corresponding path program 246 times [2021-06-05 14:43:11,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:11,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37787227] [2021-06-05 14:43:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:11,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37787227] [2021-06-05 14:43:11,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37787227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289360460] [2021-06-05 14:43:11,716 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:11,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289360460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:12,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:12,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:43:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37007674] [2021-06-05 14:43:12,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:43:12,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:12,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:43:12,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:12,157 INFO L87 Difference]: Start difference. First operand 1159 states and 3864 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:15,000 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 14:43:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:16,165 INFO L93 Difference]: Finished difference Result 2013 states and 6213 transitions. [2021-06-05 14:43:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 14:43:16,166 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:16,168 INFO L225 Difference]: With dead ends: 2013 [2021-06-05 14:43:16,168 INFO L226 Difference]: Without dead ends: 1908 [2021-06-05 14:43:16,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 3569.2ms TimeCoverageRelationStatistics Valid=633, Invalid=4917, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 14:43:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-05 14:43:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1171. [2021-06-05 14:43:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.341025641025641) internal successors, (3909), 1170 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3909 transitions. [2021-06-05 14:43:16,183 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3909 transitions. Word has length 23 [2021-06-05 14:43:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:16,183 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3909 transitions. [2021-06-05 14:43:16,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3909 transitions. [2021-06-05 14:43:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:16,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:16,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:16,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5126,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,384 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash -893034992, now seen corresponding path program 247 times [2021-06-05 14:43:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:16,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937117517] [2021-06-05 14:43:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:16,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:16,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937117517] [2021-06-05 14:43:16,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937117517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:16,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473121078] [2021-06-05 14:43:16,551 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:16,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:43:16,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:17,046 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 3 treesize of output 1 [2021-06-05 14:43:17,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,052 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 8 treesize of output 1 [2021-06-05 14:43:17,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,055 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 4 treesize of output 2 [2021-06-05 14:43:17,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,059 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 4 treesize of output 2 [2021-06-05 14:43:17,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:17,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:17,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,068 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 4 treesize of output 2 [2021-06-05 14:43:17,069 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,072 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 3 treesize of output 1 [2021-06-05 14:43:17,073 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:17,219 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 14:43:17,219 INFO L628 ElimStorePlain]: treesize reduction 63, result has 70.3 percent of original size [2021-06-05 14:43:17,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:43:17,226 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:271, output treesize:123 [2021-06-05 14:43:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:17,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473121078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:17,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:17,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 14:43:17,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407342936] [2021-06-05 14:43:17,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 14:43:17,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:17,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 14:43:17,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:43:17,905 INFO L87 Difference]: Start difference. First operand 1171 states and 3909 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:19,663 INFO L93 Difference]: Finished difference Result 1732 states and 5482 transitions. [2021-06-05 14:43:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:43:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:19,665 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 14:43:19,666 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 14:43:19,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1577.7ms TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:43:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 14:43:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1188. [2021-06-05 14:43:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.3445661331086773) internal successors, (3970), 1187 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3970 transitions. [2021-06-05 14:43:19,680 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3970 transitions. Word has length 23 [2021-06-05 14:43:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:19,680 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3970 transitions. [2021-06-05 14:43:19,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3970 transitions. [2021-06-05 14:43:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:19,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:19,681 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:19,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5142 [2021-06-05 14:43:19,882 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:19,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:19,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1872595910, now seen corresponding path program 248 times [2021-06-05 14:43:19,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:19,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543781407] [2021-06-05 14:43:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:43:20,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543781407] [2021-06-05 14:43:20,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543781407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154243831] [2021-06-05 14:43:20,025 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:20,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:20,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:20,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:20,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:43:20,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154243831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:20,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:20,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:43:20,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10282695] [2021-06-05 14:43:20,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:43:20,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:20,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:43:20,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:43:20,437 INFO L87 Difference]: Start difference. First operand 1188 states and 3970 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,687 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-06-05 14:43:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:25,697 INFO L93 Difference]: Finished difference Result 2749 states and 8424 transitions. [2021-06-05 14:43:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 14:43:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:25,701 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 14:43:25,701 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 14:43:25,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 4613.4ms TimeCoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 14:43:25,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 14:43:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1296. [2021-06-05 14:43:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.4308880308880307) internal successors, (4443), 1295 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4443 transitions. [2021-06-05 14:43:25,719 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4443 transitions. Word has length 23 [2021-06-05 14:43:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:25,719 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4443 transitions. [2021-06-05 14:43:25,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4443 transitions. [2021-06-05 14:43:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:25,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:25,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:25,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5275 [2021-06-05 14:43:25,921 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:25,921 INFO L82 PathProgramCache]: Analyzing trace with hash -88296408, now seen corresponding path program 249 times [2021-06-05 14:43:25,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:25,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335757630] [2021-06-05 14:43:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:26,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:26,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335757630] [2021-06-05 14:43:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335757630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:26,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156556592] [2021-06-05 14:43:26,070 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:26,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:26,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 14:43:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:26,551 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 14:43:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:26,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156556592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:26,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:26,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 14:43:26,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814293454] [2021-06-05 14:43:26,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:43:26,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:26,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:43:26,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:26,838 INFO L87 Difference]: Start difference. First operand 1296 states and 4443 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:28,992 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 14:43:29,475 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 14:43:29,709 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 14:43:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:30,253 INFO L93 Difference]: Finished difference Result 2273 states and 7227 transitions. [2021-06-05 14:43:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:43:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:30,256 INFO L225 Difference]: With dead ends: 2273 [2021-06-05 14:43:30,256 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 14:43:30,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 3321.6ms TimeCoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:43:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 14:43:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1342. [2021-06-05 14:43:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.41834451901566) internal successors, (4584), 1341 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) [2021-06-05 14:43:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4584 transitions. [2021-06-05 14:43:30,273 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4584 transitions. Word has length 23 [2021-06-05 14:43:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:30,273 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4584 transitions. [2021-06-05 14:43:30,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4584 transitions. [2021-06-05 14:43:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:30,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:30,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:30,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5295 [2021-06-05 14:43:30,475 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2075591694, now seen corresponding path program 250 times [2021-06-05 14:43:30,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:30,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555432419] [2021-06-05 14:43:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:30,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555432419] [2021-06-05 14:43:30,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555432419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593587331] [2021-06-05 14:43:30,578 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:30,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:30,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:43:30,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:30,742 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:30,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:30,745 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 4 treesize of output 2 [2021-06-05 14:43:30,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:30,748 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 4 treesize of output 2 [2021-06-05 14:43:30,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:30,798 INFO L628 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2021-06-05 14:43:30,801 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 3 treesize of output 1 [2021-06-05 14:43:30,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:30,834 INFO L628 ElimStorePlain]: treesize reduction 22, result has 65.6 percent of original size [2021-06-05 14:43:30,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:43:30,835 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:35 [2021-06-05 14:43:31,086 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, ends_with_10, v_prenex_186, v_prenex_185], 1=[ends_with_2]} [2021-06-05 14:43:31,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:31,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,093 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 4 treesize of output 2 [2021-06-05 14:43:31,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,213 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-06-05 14:43:31,214 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.8 percent of original size [2021-06-05 14:43:31,217 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 3 treesize of output 1 [2021-06-05 14:43:31,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,220 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 3 treesize of output 1 [2021-06-05 14:43:31,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:31,275 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 4 treesize of output 2 [2021-06-05 14:43:31,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,278 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 4 treesize of output 2 [2021-06-05 14:43:31,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,371 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 14:43:31,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_185 vanished before elimination [2021-06-05 14:43:31,373 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 3 treesize of output 1 [2021-06-05 14:43:31,374 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,377 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 4 treesize of output 2 [2021-06-05 14:43:31,378 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,380 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 4 treesize of output 2 [2021-06-05 14:43:31,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,383 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 4 treesize of output 2 [2021-06-05 14:43:31,384 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:31,448 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.3 percent of original size [2021-06-05 14:43:31,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:31,450 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:229, output treesize:45 [2021-06-05 14:43:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:31,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593587331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:31,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:31,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:43:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796710347] [2021-06-05 14:43:31,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:43:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:43:31,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:43:31,513 INFO L87 Difference]: Start difference. First operand 1342 states and 4584 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:31,877 INFO L93 Difference]: Finished difference Result 1665 states and 5536 transitions. [2021-06-05 14:43:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:43:31,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 23 [2021-06-05 14:43:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:31,880 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 14:43:31,880 INFO L226 Difference]: Without dead ends: 1620 [2021-06-05 14:43:31,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-05 14:43:31,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1277. [2021-06-05 14:43:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.4130094043887147) internal successors, (4355), 1276 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4355 transitions. [2021-06-05 14:43:31,894 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4355 transitions. Word has length 23 [2021-06-05 14:43:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:31,894 INFO L482 AbstractCegarLoop]: Abstraction has 1277 states and 4355 transitions. [2021-06-05 14:43:31,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4355 transitions. [2021-06-05 14:43:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:31,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:31,896 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:32,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5320 [2021-06-05 14:43:32,096 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:32,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:32,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1184269814, now seen corresponding path program 251 times [2021-06-05 14:43:32,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:32,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050524700] [2021-06-05 14:43:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:32,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:32,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050524700] [2021-06-05 14:43:32,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050524700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:32,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577063615] [2021-06-05 14:43:32,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:32,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:43:32,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:32,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:32,423 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 3 treesize of output 1 [2021-06-05 14:43:32,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,490 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 14:43:32,493 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 3 treesize of output 1 [2021-06-05 14:43:32,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,496 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 4 treesize of output 2 [2021-06-05 14:43:32,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,552 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.2 percent of original size [2021-06-05 14:43:32,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:43:32,555 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:107, output treesize:57 [2021-06-05 14:43:32,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:32,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:32,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,875 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 9 treesize of output 2 [2021-06-05 14:43:32,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,879 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 9 treesize of output 2 [2021-06-05 14:43:32,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:32,882 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:43:32,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:32,939 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-05 14:43:32,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:32,940 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-05 14:43:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577063615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:33,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:33,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 14:43:33,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646428177] [2021-06-05 14:43:33,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:43:33,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:33,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:43:33,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:33,019 INFO L87 Difference]: Start difference. First operand 1277 states and 4355 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:33,423 INFO L93 Difference]: Finished difference Result 1650 states and 5508 transitions. [2021-06-05 14:43:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:43:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:33,426 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 14:43:33,426 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 14:43:33,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 467.8ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 14:43:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1256. [2021-06-05 14:43:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.4087649402390436) internal successors, (4278), 1255 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4278 transitions. [2021-06-05 14:43:33,440 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4278 transitions. Word has length 23 [2021-06-05 14:43:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:33,440 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4278 transitions. [2021-06-05 14:43:33,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4278 transitions. [2021-06-05 14:43:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:33,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:33,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:33,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5367,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:33,642 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2108940534, now seen corresponding path program 252 times [2021-06-05 14:43:33,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:33,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006382100] [2021-06-05 14:43:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:33,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:33,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006382100] [2021-06-05 14:43:33,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006382100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:33,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062946312] [2021-06-05 14:43:33,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:33,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:34,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062946312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:34,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:34,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:43:34,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145405869] [2021-06-05 14:43:34,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:43:34,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:34,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:43:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:34,216 INFO L87 Difference]: Start difference. First operand 1256 states and 4278 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:35,293 INFO L93 Difference]: Finished difference Result 1604 states and 5367 transitions. [2021-06-05 14:43:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:43:35,294 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:35,296 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 14:43:35,296 INFO L226 Difference]: Without dead ends: 1538 [2021-06-05 14:43:35,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 971.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:43:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-05 14:43:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1259. [2021-06-05 14:43:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4054054054054053) internal successors, (4284), 1258 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4284 transitions. [2021-06-05 14:43:35,319 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4284 transitions. Word has length 23 [2021-06-05 14:43:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:35,319 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4284 transitions. [2021-06-05 14:43:35,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:35,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4284 transitions. [2021-06-05 14:43:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:35,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:35,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:35,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5453,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:35,521 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash -930834746, now seen corresponding path program 253 times [2021-06-05 14:43:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:35,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176457774] [2021-06-05 14:43:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:35,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176457774] [2021-06-05 14:43:35,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176457774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877652506] [2021-06-05 14:43:35,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:35,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:36,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877652506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:36,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:36,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:43:36,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367741731] [2021-06-05 14:43:36,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:43:36,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:36,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:43:36,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:43:36,168 INFO L87 Difference]: Start difference. First operand 1259 states and 4284 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:36,667 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 14:43:38,875 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-05 14:43:39,549 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-05 14:43:39,835 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 14:43:40,672 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 14:43:40,820 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 14:43:41,061 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-05 14:43:41,394 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 14:43:41,878 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 14:43:42,061 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 14:43:42,216 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-05 14:43:42,425 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 14:43:42,665 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 14:43:42,846 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 14:43:43,077 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 14:43:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:43,236 INFO L93 Difference]: Finished difference Result 2846 states and 8745 transitions. [2021-06-05 14:43:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 14:43:43,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:43,239 INFO L225 Difference]: With dead ends: 2846 [2021-06-05 14:43:43,239 INFO L226 Difference]: Without dead ends: 2537 [2021-06-05 14:43:43,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 6173.8ms TimeCoverageRelationStatistics Valid=913, Invalid=7097, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 14:43:43,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-05 14:43:43,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1324. [2021-06-05 14:43:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.4640967498110355) internal successors, (4583), 1323 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4583 transitions. [2021-06-05 14:43:43,258 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4583 transitions. Word has length 23 [2021-06-05 14:43:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:43,258 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4583 transitions. [2021-06-05 14:43:43,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4583 transitions. [2021-06-05 14:43:43,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:43,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:43,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:43,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5464 [2021-06-05 14:43:43,460 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash 359706776, now seen corresponding path program 254 times [2021-06-05 14:43:43,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:43,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93131328] [2021-06-05 14:43:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:43,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:43,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93131328] [2021-06-05 14:43:43,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93131328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:43,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049542754] [2021-06-05 14:43:43,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:43,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:43,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:43,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:43,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049542754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:43,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:43,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 14:43:43,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35756729] [2021-06-05 14:43:43,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:43:43,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:43,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:43:43,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:43,980 INFO L87 Difference]: Start difference. First operand 1324 states and 4583 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:47,633 INFO L93 Difference]: Finished difference Result 2176 states and 7003 transitions. [2021-06-05 14:43:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 14:43:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:47,636 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 14:43:47,636 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 14:43:47,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 3095.5ms TimeCoverageRelationStatistics Valid=597, Invalid=5723, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 14:43:47,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 14:43:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1362. [2021-06-05 14:43:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.476855253490081) internal successors, (4732), 1361 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4732 transitions. [2021-06-05 14:43:47,653 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4732 transitions. Word has length 23 [2021-06-05 14:43:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:47,653 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 4732 transitions. [2021-06-05 14:43:47,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4732 transitions. [2021-06-05 14:43:47,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:47,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:47,655 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:47,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5476,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:47,855 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1320997318, now seen corresponding path program 255 times [2021-06-05 14:43:47,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:47,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224062927] [2021-06-05 14:43:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:47,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:47,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224062927] [2021-06-05 14:43:47,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224062927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:47,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180891357] [2021-06-05 14:43:47,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:48,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:43:48,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:48,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:48,156 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 3 treesize of output 1 [2021-06-05 14:43:48,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,222 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-05 14:43:48,224 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 4 treesize of output 2 [2021-06-05 14:43:48,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,284 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-05 14:43:48,286 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 3 treesize of output 1 [2021-06-05 14:43:48,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,341 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 14:43:48,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:43:48,343 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-05 14:43:48,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:43:48,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,603 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 8 treesize of output 1 [2021-06-05 14:43:48,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,607 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 9 treesize of output 2 [2021-06-05 14:43:48,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:43:48,610 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 8 treesize of output 1 [2021-06-05 14:43:48,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:48,663 INFO L628 ElimStorePlain]: treesize reduction 26, result has 68.7 percent of original size [2021-06-05 14:43:48,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:48,665 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:41 [2021-06-05 14:43:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:48,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180891357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:48,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:48,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:43:48,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122679044] [2021-06-05 14:43:48,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:43:48,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:48,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:43:48,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:43:48,743 INFO L87 Difference]: Start difference. First operand 1362 states and 4732 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:49,161 INFO L93 Difference]: Finished difference Result 1860 states and 6275 transitions. [2021-06-05 14:43:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:43:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:49,164 INFO L225 Difference]: With dead ends: 1860 [2021-06-05 14:43:49,164 INFO L226 Difference]: Without dead ends: 1806 [2021-06-05 14:43:49,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:43:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-06-05 14:43:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1380. [2021-06-05 14:43:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.4851341551849164) internal successors, (4806), 1379 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4806 transitions. [2021-06-05 14:43:49,180 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4806 transitions. Word has length 23 [2021-06-05 14:43:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:49,180 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4806 transitions. [2021-06-05 14:43:49,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4806 transitions. [2021-06-05 14:43:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:49,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:49,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:49,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5492 [2021-06-05 14:43:49,384 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:49,384 INFO L82 PathProgramCache]: Analyzing trace with hash 148239946, now seen corresponding path program 256 times [2021-06-05 14:43:49,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:49,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870853935] [2021-06-05 14:43:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:49,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:49,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870853935] [2021-06-05 14:43:49,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870853935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:49,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091287785] [2021-06-05 14:43:49,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:49,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:43:49,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:43:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:49,802 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 4 treesize of output 2 [2021-06-05 14:43:49,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:49,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:49,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:49,808 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 4 treesize of output 2 [2021-06-05 14:43:49,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:49,858 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-05 14:43:49,860 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 3 treesize of output 1 [2021-06-05 14:43:49,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:49,893 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-05 14:43:49,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:43:49,894 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:33 [2021-06-05 14:43:50,301 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_194], 1=[ends_with_2]} [2021-06-05 14:43:50,305 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 3 treesize of output 1 [2021-06-05 14:43:50,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:50,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,464 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 14:43:50,465 INFO L628 ElimStorePlain]: treesize reduction 49, result has 78.1 percent of original size [2021-06-05 14:43:50,468 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 3 treesize of output 1 [2021-06-05 14:43:50,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,472 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 4 treesize of output 2 [2021-06-05 14:43:50,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,475 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 3 treesize of output 1 [2021-06-05 14:43:50,476 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,479 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 4 treesize of output 2 [2021-06-05 14:43:50,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,483 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 4 treesize of output 2 [2021-06-05 14:43:50,484 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,598 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-05 14:43:50,598 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.4 percent of original size [2021-06-05 14:43:50,601 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 3 treesize of output 1 [2021-06-05 14:43:50,602 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,605 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 4 treesize of output 2 [2021-06-05 14:43:50,606 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,608 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 4 treesize of output 2 [2021-06-05 14:43:50,609 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,612 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 4 treesize of output 2 [2021-06-05 14:43:50,613 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:50,700 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-05 14:43:50,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:43:50,702 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:261, output treesize:57 [2021-06-05 14:43:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:50,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091287785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:50,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:50,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:43:50,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026110471] [2021-06-05 14:43:50,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:43:50,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:50,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:43:50,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:50,813 INFO L87 Difference]: Start difference. First operand 1380 states and 4806 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:52,538 INFO L93 Difference]: Finished difference Result 1752 states and 5922 transitions. [2021-06-05 14:43:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:43:52,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:52,540 INFO L225 Difference]: With dead ends: 1752 [2021-06-05 14:43:52,540 INFO L226 Difference]: Without dead ends: 1650 [2021-06-05 14:43:52,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1598.3ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:43:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-05 14:43:52,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1350. [2021-06-05 14:43:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.467753891771683) internal successors, (4678), 1349 states have internal predecessors, (4678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4678 transitions. [2021-06-05 14:43:52,555 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4678 transitions. Word has length 23 [2021-06-05 14:43:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:52,555 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4678 transitions. [2021-06-05 14:43:52,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4678 transitions. [2021-06-05 14:43:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:52,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:52,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:52,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5537,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:52,761 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1096509210, now seen corresponding path program 257 times [2021-06-05 14:43:52,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:52,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158726115] [2021-06-05 14:43:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:52,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158726115] [2021-06-05 14:43:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158726115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702953727] [2021-06-05 14:43:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:53,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:43:53,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:43:53,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:53,106 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 3 treesize of output 1 [2021-06-05 14:43:53,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,180 INFO L628 ElimStorePlain]: treesize reduction 48, result has 64.7 percent of original size [2021-06-05 14:43:53,183 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 4 treesize of output 2 [2021-06-05 14:43:53,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:53,219 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 4 treesize of output 2 [2021-06-05 14:43:53,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,269 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 14:43:53,271 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 3 treesize of output 1 [2021-06-05 14:43:53,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:53,296 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-05 14:43:53,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:53,296 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:139, output treesize:58 [2021-06-05 14:43:53,502 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 3 treesize of output 1 [2021-06-05 14:43:53,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,507 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 3 treesize of output 1 [2021-06-05 14:43:53,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,637 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-05 14:43:53,638 INFO L628 ElimStorePlain]: treesize reduction 169, result has 46.3 percent of original size [2021-06-05 14:43:53,640 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 4 treesize of output 2 [2021-06-05 14:43:53,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,644 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 4 treesize of output 2 [2021-06-05 14:43:53,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,647 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 4 treesize of output 2 [2021-06-05 14:43:53,648 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,651 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 3 treesize of output 1 [2021-06-05 14:43:53,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,654 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 4 treesize of output 2 [2021-06-05 14:43:53,655 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,743 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 14:43:53,746 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 4 treesize of output 2 [2021-06-05 14:43:53,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,749 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 4 treesize of output 2 [2021-06-05 14:43:53,750 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:53,801 INFO L628 ElimStorePlain]: treesize reduction 51, result has 56.8 percent of original size [2021-06-05 14:43:53,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:53,803 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:321, output treesize:55 [2021-06-05 14:43:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702953727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:53,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:53,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:43:53,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395576250] [2021-06-05 14:43:53,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:43:53,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:53,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:43:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:53,910 INFO L87 Difference]: Start difference. First operand 1350 states and 4678 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:55,133 INFO L93 Difference]: Finished difference Result 1969 states and 6573 transitions. [2021-06-05 14:43:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:43:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:55,136 INFO L225 Difference]: With dead ends: 1969 [2021-06-05 14:43:55,136 INFO L226 Difference]: Without dead ends: 1918 [2021-06-05 14:43:55,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1120.5ms TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:43:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-05 14:43:55,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1339. [2021-06-05 14:43:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.4715994020926755) internal successors, (4645), 1338 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4645 transitions. [2021-06-05 14:43:55,152 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4645 transitions. Word has length 23 [2021-06-05 14:43:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:55,152 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4645 transitions. [2021-06-05 14:43:55,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4645 transitions. [2021-06-05 14:43:55,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:55,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:55,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:55,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-06-05 14:43:55,354 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1328644520, now seen corresponding path program 258 times [2021-06-05 14:43:55,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:55,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098087229] [2021-06-05 14:43:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:43:55,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:55,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098087229] [2021-06-05 14:43:55,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098087229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:55,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378059495] [2021-06-05 14:43:55,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:55,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:43:55,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:43:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:55,683 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 5 treesize of output 1 [2021-06-05 14:43:55,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,754 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 14:43:55,757 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 6 treesize of output 2 [2021-06-05 14:43:55,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,760 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 5 treesize of output 1 [2021-06-05 14:43:55,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,775 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 6 treesize of output 2 [2021-06-05 14:43:55,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:55,823 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 14:43:55,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:55,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:111, output treesize:62 [2021-06-05 14:43:56,019 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 3 treesize of output 1 [2021-06-05 14:43:56,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:43:56,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,098 INFO L628 ElimStorePlain]: treesize reduction 92, result has 47.1 percent of original size [2021-06-05 14:43:56,100 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 4 treesize of output 2 [2021-06-05 14:43:56,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,106 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 4 treesize of output 2 [2021-06-05 14:43:56,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,109 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 3 treesize of output 1 [2021-06-05 14:43:56,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:43:56,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-06-05 14:43:56,140 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 4 treesize of output 2 [2021-06-05 14:43:56,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,143 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 3 treesize of output 1 [2021-06-05 14:43:56,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:43:56,191 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-05 14:43:56,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:43:56,193 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:204, output treesize:51 [2021-06-05 14:43:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:56,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378059495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:56,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:56,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 14:43:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178154037] [2021-06-05 14:43:56,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:43:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:43:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:43:56,278 INFO L87 Difference]: Start difference. First operand 1339 states and 4645 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:43:57,474 INFO L93 Difference]: Finished difference Result 1855 states and 6186 transitions. [2021-06-05 14:43:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:43:57,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:43:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:43:57,477 INFO L225 Difference]: With dead ends: 1855 [2021-06-05 14:43:57,477 INFO L226 Difference]: Without dead ends: 1804 [2021-06-05 14:43:57,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1090.2ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:43:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-06-05 14:43:57,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1356. [2021-06-05 14:43:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.482656826568266) internal successors, (4719), 1355 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4719 transitions. [2021-06-05 14:43:57,492 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4719 transitions. Word has length 23 [2021-06-05 14:43:57,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:43:57,492 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4719 transitions. [2021-06-05 14:43:57,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:43:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4719 transitions. [2021-06-05 14:43:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:43:57,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:43:57,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:43:57,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:57,695 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:43:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:43:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1065013066, now seen corresponding path program 259 times [2021-06-05 14:43:57,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:43:57,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385744548] [2021-06-05 14:43:57,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:43:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:57,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:43:57,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385744548] [2021-06-05 14:43:57,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385744548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:57,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741294069] [2021-06-05 14:43:57,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:43:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:43:57,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:43:57,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:43:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:43:58,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741294069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:43:58,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:43:58,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 14:43:58,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931823338] [2021-06-05 14:43:58,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:43:58,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:43:58,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:43:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:43:58,190 INFO L87 Difference]: Start difference. First operand 1356 states and 4719 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:02,157 INFO L93 Difference]: Finished difference Result 2432 states and 7719 transitions. [2021-06-05 14:44:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 14:44:02,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:02,160 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 14:44:02,160 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 14:44:02,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 3353.1ms TimeCoverageRelationStatistics Valid=606, Invalid=5556, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 14:44:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 14:44:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1375. [2021-06-05 14:44:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.4963609898107713) internal successors, (4804), 1374 states have internal predecessors, (4804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4804 transitions. [2021-06-05 14:44:02,188 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4804 transitions. Word has length 23 [2021-06-05 14:44:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:02,188 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4804 transitions. [2021-06-05 14:44:02,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:02,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4804 transitions. [2021-06-05 14:44:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:44:02,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:02,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:02,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5721,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:02,390 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:02,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904426, now seen corresponding path program 260 times [2021-06-05 14:44:02,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:02,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601245115] [2021-06-05 14:44:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:02,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:02,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601245115] [2021-06-05 14:44:02,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601245115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:02,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652429957] [2021-06-05 14:44:02,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:02,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:02,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:02,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:44:02,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:02,853 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 4 treesize of output 2 [2021-06-05 14:44:02,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:02,857 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 3 treesize of output 1 [2021-06-05 14:44:02,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:02,860 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 4 treesize of output 2 [2021-06-05 14:44:02,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:02,863 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 4 treesize of output 2 [2021-06-05 14:44:02,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:02,926 INFO L628 ElimStorePlain]: treesize reduction 52, result has 57.4 percent of original size [2021-06-05 14:44:02,926 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:44:02,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 14:44:02,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:70 [2021-06-05 14:44:03,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:03,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:03,249 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 7 treesize of output 1 [2021-06-05 14:44:03,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:03,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:03,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:03,257 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 8 treesize of output 1 [2021-06-05 14:44:03,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:03,260 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 8 treesize of output 1 [2021-06-05 14:44:03,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,322 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.4 percent of original size [2021-06-05 14:44:03,324 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 4 treesize of output 2 [2021-06-05 14:44:03,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,327 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 4 treesize of output 2 [2021-06-05 14:44:03,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:03,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:03,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:03,353 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-05 14:44:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:03,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652429957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:03,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:03,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:44:03,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739766091] [2021-06-05 14:44:03,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:44:03,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:03,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:44:03,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:03,438 INFO L87 Difference]: Start difference. First operand 1375 states and 4804 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:05,191 INFO L93 Difference]: Finished difference Result 1790 states and 5946 transitions. [2021-06-05 14:44:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:44:05,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:05,194 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 14:44:05,194 INFO L226 Difference]: Without dead ends: 1730 [2021-06-05 14:44:05,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1376.1ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:44:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-05 14:44:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1351. [2021-06-05 14:44:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.4955555555555557) internal successors, (4719), 1350 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4719 transitions. [2021-06-05 14:44:05,210 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4719 transitions. Word has length 23 [2021-06-05 14:44:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:05,210 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4719 transitions. [2021-06-05 14:44:05,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4719 transitions. [2021-06-05 14:44:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:44:05,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:05,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:05,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5736,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:05,412 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:05,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1028994524, now seen corresponding path program 261 times [2021-06-05 14:44:05,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:05,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760343196] [2021-06-05 14:44:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:05,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:05,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760343196] [2021-06-05 14:44:05,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760343196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:05,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463287799] [2021-06-05 14:44:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:05,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:44:05,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:44:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:06,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463287799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:06,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:06,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:44:06,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474931741] [2021-06-05 14:44:06,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:44:06,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:44:06,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:44:06,019 INFO L87 Difference]: Start difference. First operand 1351 states and 4719 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:07,869 INFO L93 Difference]: Finished difference Result 1756 states and 5813 transitions. [2021-06-05 14:44:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:44:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:07,872 INFO L225 Difference]: With dead ends: 1756 [2021-06-05 14:44:07,872 INFO L226 Difference]: Without dead ends: 1680 [2021-06-05 14:44:07,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1409.0ms TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:44:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-06-05 14:44:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1318. [2021-06-05 14:44:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.4738041002277904) internal successors, (4575), 1317 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4575 transitions. [2021-06-05 14:44:07,887 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4575 transitions. Word has length 23 [2021-06-05 14:44:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:07,887 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4575 transitions. [2021-06-05 14:44:07,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4575 transitions. [2021-06-05 14:44:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:44:07,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:07,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:08,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5818 [2021-06-05 14:44:08,089 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1103912864, now seen corresponding path program 262 times [2021-06-05 14:44:08,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:08,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855060650] [2021-06-05 14:44:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:08,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:08,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855060650] [2021-06-05 14:44:08,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855060650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:08,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128273389] [2021-06-05 14:44:08,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:08,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:08,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:44:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:08,580 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 4 treesize of output 2 [2021-06-05 14:44:08,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:08,675 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 14:44:08,677 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 3 treesize of output 1 [2021-06-05 14:44:08,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:08,737 INFO L628 ElimStorePlain]: treesize reduction 28, result has 71.7 percent of original size [2021-06-05 14:44:08,740 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 3 treesize of output 1 [2021-06-05 14:44:08,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:08,793 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-05 14:44:08,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:44:08,795 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-05 14:44:09,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:09,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:09,099 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 9 treesize of output 2 [2021-06-05 14:44:09,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:09,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:09,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:09,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:44:09,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:09,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:09,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:09,111 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 8 treesize of output 1 [2021-06-05 14:44:09,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:09,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:09,115 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 9 treesize of output 2 [2021-06-05 14:44:09,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:09,245 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 14:44:09,246 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.6 percent of original size [2021-06-05 14:44:09,248 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 4 treesize of output 2 [2021-06-05 14:44:09,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:09,252 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 4 treesize of output 2 [2021-06-05 14:44:09,253 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:09,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:09,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:44:09,308 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-05 14:44:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:09,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128273389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:09,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:09,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 14:44:09,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632466252] [2021-06-05 14:44:09,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:44:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:09,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:44:09,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:44:09,467 INFO L87 Difference]: Start difference. First operand 1318 states and 4575 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:10,315 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 14:44:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:10,441 INFO L93 Difference]: Finished difference Result 1728 states and 5785 transitions. [2021-06-05 14:44:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:44:10,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:10,444 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 14:44:10,444 INFO L226 Difference]: Without dead ends: 1674 [2021-06-05 14:44:10,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1221.7ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:44:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-05 14:44:10,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1307. [2021-06-05 14:44:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.4640122511485454) internal successors, (4524), 1306 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4524 transitions. [2021-06-05 14:44:10,458 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4524 transitions. Word has length 23 [2021-06-05 14:44:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:10,458 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4524 transitions. [2021-06-05 14:44:10,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4524 transitions. [2021-06-05 14:44:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:44:10,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:10,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:10,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5836 [2021-06-05 14:44:10,660 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:10,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:10,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1968196404, now seen corresponding path program 263 times [2021-06-05 14:44:10,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:10,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435415596] [2021-06-05 14:44:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:10,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:10,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435415596] [2021-06-05 14:44:10,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435415596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:10,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452905488] [2021-06-05 14:44:10,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:10,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:44:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:10,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:44:10,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452905488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:11,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:11,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 14:44:11,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215508458] [2021-06-05 14:44:11,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:44:11,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:44:11,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:11,194 INFO L87 Difference]: Start difference. First operand 1307 states and 4524 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:12,782 INFO L93 Difference]: Finished difference Result 1893 states and 6259 transitions. [2021-06-05 14:44:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:44:12,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:12,785 INFO L225 Difference]: With dead ends: 1893 [2021-06-05 14:44:12,785 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 14:44:12,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1200.8ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:44:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 14:44:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1302. [2021-06-05 14:44:12,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.458877786318217) internal successors, (4500), 1301 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4500 transitions. [2021-06-05 14:44:12,800 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4500 transitions. Word has length 23 [2021-06-05 14:44:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:12,800 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4500 transitions. [2021-06-05 14:44:12,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4500 transitions. [2021-06-05 14:44:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:44:12,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:12,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:13,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-06-05 14:44:13,002 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash 109506426, now seen corresponding path program 264 times [2021-06-05 14:44:13,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:13,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127737364] [2021-06-05 14:44:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:13,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127737364] [2021-06-05 14:44:13,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127737364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42073605] [2021-06-05 14:44:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:13,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:44:13,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:13,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:44:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:13,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42073605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:13,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:13,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:44:13,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208423337] [2021-06-05 14:44:13,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:13,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:13,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:13,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:13,459 INFO L87 Difference]: Start difference. First operand 1302 states and 4500 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:16,702 INFO L93 Difference]: Finished difference Result 2376 states and 7653 transitions. [2021-06-05 14:44:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 14:44:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:16,706 INFO L225 Difference]: With dead ends: 2376 [2021-06-05 14:44:16,706 INFO L226 Difference]: Without dead ends: 2187 [2021-06-05 14:44:16,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2665.6ms TimeCoverageRelationStatistics Valid=536, Invalid=4434, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 14:44:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-05 14:44:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1345. [2021-06-05 14:44:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.486607142857143) internal successors, (4686), 1344 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4686 transitions. [2021-06-05 14:44:16,723 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4686 transitions. Word has length 23 [2021-06-05 14:44:16,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:16,723 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4686 transitions. [2021-06-05 14:44:16,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:16,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4686 transitions. [2021-06-05 14:44:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:44:16,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:16,725 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:16,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5911 [2021-06-05 14:44:16,925 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:16,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2135427910, now seen corresponding path program 265 times [2021-06-05 14:44:16,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:16,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178166586] [2021-06-05 14:44:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:17,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:17,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178166586] [2021-06-05 14:44:17,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178166586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:17,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178078009] [2021-06-05 14:44:17,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:44:17,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:17,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178078009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:17,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:17,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 14:44:17,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925248396] [2021-06-05 14:44:17,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:17,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:17,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:17,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:17,441 INFO L87 Difference]: Start difference. First operand 1345 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:19,774 INFO L93 Difference]: Finished difference Result 2059 states and 6741 transitions. [2021-06-05 14:44:19,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 14:44:19,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:19,777 INFO L225 Difference]: With dead ends: 2059 [2021-06-05 14:44:19,777 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 14:44:19,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1888.1ms TimeCoverageRelationStatistics Valid=410, Invalid=3130, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:44:19,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 14:44:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1275. [2021-06-05 14:44:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.4505494505494507) internal successors, (4396), 1274 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4396 transitions. [2021-06-05 14:44:19,792 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4396 transitions. Word has length 23 [2021-06-05 14:44:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:19,792 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4396 transitions. [2021-06-05 14:44:19,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4396 transitions. [2021-06-05 14:44:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:44:19,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:19,794 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:19,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5930,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:19,994 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:19,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:19,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2009463328, now seen corresponding path program 266 times [2021-06-05 14:44:19,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:19,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526664325] [2021-06-05 14:44:19,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:20,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:20,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526664325] [2021-06-05 14:44:20,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526664325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:20,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787005519] [2021-06-05 14:44:20,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:44:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:20,510 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 3 treesize of output 1 [2021-06-05 14:44:20,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,595 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-05 14:44:20,598 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 4 treesize of output 2 [2021-06-05 14:44:20,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,601 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 4 treesize of output 2 [2021-06-05 14:44:20,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,661 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-05 14:44:20,663 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 3 treesize of output 1 [2021-06-05 14:44:20,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:20,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:44:20,693 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 14:44:20,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:20,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:20,903 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 8 treesize of output 1 [2021-06-05 14:44:20,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:20,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:20,907 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 8 treesize of output 1 [2021-06-05 14:44:20,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:20,911 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 7 treesize of output 1 [2021-06-05 14:44:20,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:44:20,914 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 7 treesize of output 1 [2021-06-05 14:44:20,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:20,957 INFO L628 ElimStorePlain]: treesize reduction 45, result has 46.4 percent of original size [2021-06-05 14:44:20,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:20,958 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:33 [2021-06-05 14:44:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:21,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787005519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:21,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:21,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:44:21,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400322694] [2021-06-05 14:44:21,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:44:21,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:21,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:44:21,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:21,032 INFO L87 Difference]: Start difference. First operand 1275 states and 4396 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:23,617 INFO L93 Difference]: Finished difference Result 1896 states and 6139 transitions. [2021-06-05 14:44:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:44:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:44:23,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:23,620 INFO L225 Difference]: With dead ends: 1896 [2021-06-05 14:44:23,620 INFO L226 Difference]: Without dead ends: 1788 [2021-06-05 14:44:23,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2148.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:44:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-06-05 14:44:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1253. [2021-06-05 14:44:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.4544728434504792) internal successors, (4325), 1252 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4325 transitions. [2021-06-05 14:44:23,635 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4325 transitions. Word has length 23 [2021-06-05 14:44:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:23,636 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4325 transitions. [2021-06-05 14:44:23,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4325 transitions. [2021-06-05 14:44:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:23,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:23,637 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:23,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:23,838 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:23,838 INFO L82 PathProgramCache]: Analyzing trace with hash 995054606, now seen corresponding path program 267 times [2021-06-05 14:44:23,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:23,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312425766] [2021-06-05 14:44:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:23,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:23,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312425766] [2021-06-05 14:44:23,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312425766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:23,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642484783] [2021-06-05 14:44:23,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:24,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:44:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:24,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:24,104 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 4 treesize of output 2 [2021-06-05 14:44:24,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:24,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:24,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:44:24,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 14:44:24,218 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 4 treesize of output 2 [2021-06-05 14:44:24,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:24,221 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 4 treesize of output 2 [2021-06-05 14:44:24,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:24,223 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 4 treesize of output 2 [2021-06-05 14:44:24,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:24,261 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:44:24,263 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 4 treesize of output 2 [2021-06-05 14:44:24,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:24,265 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 3 treesize of output 1 [2021-06-05 14:44:24,266 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:24,292 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:44:24,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:24,293 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:44:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:24,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642484783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:24,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:24,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 14:44:24,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409241068] [2021-06-05 14:44:24,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:44:24,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:24,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:44:24,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:44:24,332 INFO L87 Difference]: Start difference. First operand 1253 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:25,665 INFO L93 Difference]: Finished difference Result 1836 states and 5986 transitions. [2021-06-05 14:44:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:44:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:25,668 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 14:44:25,668 INFO L226 Difference]: Without dead ends: 1742 [2021-06-05 14:44:25,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1095.7ms TimeCoverageRelationStatistics Valid=448, Invalid=2102, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:44:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-06-05 14:44:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1236. [2021-06-05 14:44:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.473684210526316) internal successors, (4290), 1235 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4290 transitions. [2021-06-05 14:44:25,684 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4290 transitions. Word has length 24 [2021-06-05 14:44:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:25,684 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 4290 transitions. [2021-06-05 14:44:25,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4290 transitions. [2021-06-05 14:44:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:25,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:25,685 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:25,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6002 [2021-06-05 14:44:25,886 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash -402598, now seen corresponding path program 268 times [2021-06-05 14:44:25,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:25,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003855154] [2021-06-05 14:44:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:25,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003855154] [2021-06-05 14:44:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003855154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:25,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861940796] [2021-06-05 14:44:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:26,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:26,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:26,101 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 4 treesize of output 2 [2021-06-05 14:44:26,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:26,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:26,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:44:26,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 14:44:26,169 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 4 treesize of output 2 [2021-06-05 14:44:26,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:26,172 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 4 treesize of output 2 [2021-06-05 14:44:26,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:26,175 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 4 treesize of output 2 [2021-06-05 14:44:26,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:26,212 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:44:26,214 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 4 treesize of output 2 [2021-06-05 14:44:26,215 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:26,216 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 3 treesize of output 1 [2021-06-05 14:44:26,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:26,244 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:44:26,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:26,245 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:44:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:26,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861940796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:26,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:26,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-06-05 14:44:26,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032313741] [2021-06-05 14:44:26,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:44:26,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:26,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:44:26,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:44:26,280 INFO L87 Difference]: Start difference. First operand 1236 states and 4290 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:26,645 INFO L93 Difference]: Finished difference Result 1658 states and 5527 transitions. [2021-06-05 14:44:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:44:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:26,647 INFO L225 Difference]: With dead ends: 1658 [2021-06-05 14:44:26,647 INFO L226 Difference]: Without dead ends: 1599 [2021-06-05 14:44:26,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:44:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-05 14:44:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1258. [2021-06-05 14:44:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.484486873508353) internal successors, (4380), 1257 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4380 transitions. [2021-06-05 14:44:26,661 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4380 transitions. Word has length 24 [2021-06-05 14:44:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:26,661 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4380 transitions. [2021-06-05 14:44:26,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4380 transitions. [2021-06-05 14:44:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:26,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:26,662 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:26,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6010,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:26,863 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2080068998, now seen corresponding path program 269 times [2021-06-05 14:44:26,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:26,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604428280] [2021-06-05 14:44:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:26,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:26,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604428280] [2021-06-05 14:44:26,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604428280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:26,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39036849] [2021-06-05 14:44:26,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:27,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:27,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:27,081 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 4 treesize of output 2 [2021-06-05 14:44:27,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:27,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:27,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:44:27,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 14:44:27,155 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 4 treesize of output 2 [2021-06-05 14:44:27,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:27,158 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 4 treesize of output 2 [2021-06-05 14:44:27,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:27,161 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 4 treesize of output 2 [2021-06-05 14:44:27,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:27,198 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:44:27,200 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 4 treesize of output 2 [2021-06-05 14:44:27,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:27,203 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 3 treesize of output 1 [2021-06-05 14:44:27,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:27,230 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:44:27,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:27,231 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:44:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:27,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39036849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:27,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:27,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 14:44:27,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616772159] [2021-06-05 14:44:27,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:27,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:27,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:27,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:27,275 INFO L87 Difference]: Start difference. First operand 1258 states and 4380 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:27,672 INFO L93 Difference]: Finished difference Result 1659 states and 5547 transitions. [2021-06-05 14:44:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:44:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:27,674 INFO L225 Difference]: With dead ends: 1659 [2021-06-05 14:44:27,674 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 14:44:27,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 14:44:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1283. [2021-06-05 14:44:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.49609984399376) internal successors, (4482), 1282 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4482 transitions. [2021-06-05 14:44:27,688 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4482 transitions. Word has length 24 [2021-06-05 14:44:27,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:27,688 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4482 transitions. [2021-06-05 14:44:27,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4482 transitions. [2021-06-05 14:44:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:27,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:27,690 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:27,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6019,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:27,890 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1039407654, now seen corresponding path program 270 times [2021-06-05 14:44:27,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:27,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861823458] [2021-06-05 14:44:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:28,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861823458] [2021-06-05 14:44:28,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861823458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:28,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116899375] [2021-06-05 14:44:28,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:28,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:28,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:28,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:28,179 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 4 treesize of output 2 [2021-06-05 14:44:28,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:28,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:28,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:44:28,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-05 14:44:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:28,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116899375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:28,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:28,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 14:44:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229513143] [2021-06-05 14:44:28,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:44:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:44:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:44:28,432 INFO L87 Difference]: Start difference. First operand 1283 states and 4482 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:30,781 INFO L93 Difference]: Finished difference Result 2239 states and 7277 transitions. [2021-06-05 14:44:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:44:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:30,784 INFO L225 Difference]: With dead ends: 2239 [2021-06-05 14:44:30,784 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 14:44:30,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1934.1ms TimeCoverageRelationStatistics Valid=491, Invalid=2931, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 14:44:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 14:44:30,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1282. [2021-06-05 14:44:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.501951600312256) internal successors, (4486), 1281 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4486 transitions. [2021-06-05 14:44:30,800 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4486 transitions. Word has length 24 [2021-06-05 14:44:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:30,800 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4486 transitions. [2021-06-05 14:44:30,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4486 transitions. [2021-06-05 14:44:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:30,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:30,801 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:31,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6027,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:31,002 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:31,002 INFO L82 PathProgramCache]: Analyzing trace with hash -794804850, now seen corresponding path program 271 times [2021-06-05 14:44:31,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:31,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398012951] [2021-06-05 14:44:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:31,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:31,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398012951] [2021-06-05 14:44:31,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398012951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:31,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049016804] [2021-06-05 14:44:31,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:31,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:31,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:31,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:31,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,264 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 14:44:31,266 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 6 treesize of output 2 [2021-06-05 14:44:31,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:31,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:31,276 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-05 14:44:31,326 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 4 treesize of output 2 [2021-06-05 14:44:31,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,329 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 4 treesize of output 2 [2021-06-05 14:44:31,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,333 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 4 treesize of output 2 [2021-06-05 14:44:31,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,369 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:44:31,371 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 4 treesize of output 2 [2021-06-05 14:44:31,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,376 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 3 treesize of output 1 [2021-06-05 14:44:31,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:31,403 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:44:31,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:31,404 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:44:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:31,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049016804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:31,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:31,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:44:31,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068651673] [2021-06-05 14:44:31,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:31,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:31,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:31,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:31,450 INFO L87 Difference]: Start difference. First operand 1282 states and 4486 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:31,821 INFO L93 Difference]: Finished difference Result 1579 states and 5362 transitions. [2021-06-05 14:44:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:31,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:31,824 INFO L225 Difference]: With dead ends: 1579 [2021-06-05 14:44:31,824 INFO L226 Difference]: Without dead ends: 1528 [2021-06-05 14:44:31,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-05 14:44:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1318. [2021-06-05 14:44:31,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.507972665148064) internal successors, (4620), 1317 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4620 transitions. [2021-06-05 14:44:31,837 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4620 transitions. Word has length 24 [2021-06-05 14:44:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:31,837 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4620 transitions. [2021-06-05 14:44:31,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4620 transitions. [2021-06-05 14:44:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:31,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:31,839 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:32,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6063 [2021-06-05 14:44:32,039 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1285666746, now seen corresponding path program 272 times [2021-06-05 14:44:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:32,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281584962] [2021-06-05 14:44:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:32,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281584962] [2021-06-05 14:44:32,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281584962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:32,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365453180] [2021-06-05 14:44:32,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:32,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:32,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:32,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:32,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:32,322 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 6 treesize of output 2 [2021-06-05 14:44:32,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,342 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-05 14:44:32,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:32,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-05 14:44:32,419 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 4 treesize of output 2 [2021-06-05 14:44:32,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,423 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 4 treesize of output 2 [2021-06-05 14:44:32,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,425 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 4 treesize of output 2 [2021-06-05 14:44:32,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,462 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:44:32,464 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 4 treesize of output 2 [2021-06-05 14:44:32,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,467 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 3 treesize of output 1 [2021-06-05 14:44:32,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:32,511 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:44:32,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:32,512 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:44:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:32,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365453180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:32,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:32,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:44:32,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979433349] [2021-06-05 14:44:32,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:32,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:32,586 INFO L87 Difference]: Start difference. First operand 1318 states and 4620 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:32,990 INFO L93 Difference]: Finished difference Result 1678 states and 5684 transitions. [2021-06-05 14:44:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:32,993 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 14:44:32,993 INFO L226 Difference]: Without dead ends: 1627 [2021-06-05 14:44:32,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-05 14:44:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1343. [2021-06-05 14:44:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.518628912071535) internal successors, (4722), 1342 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4722 transitions. [2021-06-05 14:44:33,007 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4722 transitions. Word has length 24 [2021-06-05 14:44:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:33,007 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4722 transitions. [2021-06-05 14:44:33,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4722 transitions. [2021-06-05 14:44:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:33,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:33,009 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:33,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6069 [2021-06-05 14:44:33,209 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1833809906, now seen corresponding path program 273 times [2021-06-05 14:44:33,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:33,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734476835] [2021-06-05 14:44:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:33,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:33,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734476835] [2021-06-05 14:44:33,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734476835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:33,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091711049] [2021-06-05 14:44:33,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:33,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:44:33,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:33,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:33,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:33,492 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 6 treesize of output 2 [2021-06-05 14:44:33,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,519 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-05 14:44:33,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:33,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-05 14:44:33,687 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 4 treesize of output 2 [2021-06-05 14:44:33,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,690 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 4 treesize of output 2 [2021-06-05 14:44:33,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,694 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 4 treesize of output 2 [2021-06-05 14:44:33,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,697 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:33,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:33,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,703 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 3 treesize of output 1 [2021-06-05 14:44:33,704 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:33,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,709 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 3 treesize of output 1 [2021-06-05 14:44:33,710 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,778 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.4 percent of original size [2021-06-05 14:44:33,780 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 4 treesize of output 2 [2021-06-05 14:44:33,781 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,783 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 3 treesize of output 1 [2021-06-05 14:44:33,784 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,786 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 4 treesize of output 2 [2021-06-05 14:44:33,787 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:33,827 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-05 14:44:33,827 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-05 14:44:33,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:33,828 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-05 14:44:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:33,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091711049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:33,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:33,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:44:33,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456295669] [2021-06-05 14:44:33,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:33,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:33,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:33,901 INFO L87 Difference]: Start difference. First operand 1343 states and 4722 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:34,291 INFO L93 Difference]: Finished difference Result 1761 states and 5948 transitions. [2021-06-05 14:44:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:34,294 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 14:44:34,294 INFO L226 Difference]: Without dead ends: 1710 [2021-06-05 14:44:34,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-06-05 14:44:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1371. [2021-06-05 14:44:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.55036496350365) internal successors, (4864), 1370 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4864 transitions. [2021-06-05 14:44:34,310 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4864 transitions. Word has length 24 [2021-06-05 14:44:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:34,310 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4864 transitions. [2021-06-05 14:44:34,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4864 transitions. [2021-06-05 14:44:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:34,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:34,311 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:34,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6079 [2021-06-05 14:44:34,512 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:34,512 INFO L82 PathProgramCache]: Analyzing trace with hash -220243172, now seen corresponding path program 274 times [2021-06-05 14:44:34,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:34,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989048784] [2021-06-05 14:44:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:34,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:34,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989048784] [2021-06-05 14:44:34,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989048784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:34,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197268471] [2021-06-05 14:44:34,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:34,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:34,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:34,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:34,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,786 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-05 14:44:34,788 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 6 treesize of output 2 [2021-06-05 14:44:34,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:34,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:34,799 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-05 14:44:34,948 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 3 treesize of output 1 [2021-06-05 14:44:34,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,952 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 4 treesize of output 2 [2021-06-05 14:44:34,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,955 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 3 treesize of output 1 [2021-06-05 14:44:34,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,959 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 4 treesize of output 2 [2021-06-05 14:44:34,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,962 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 4 treesize of output 2 [2021-06-05 14:44:34,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:34,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,969 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 4 treesize of output 2 [2021-06-05 14:44:34,970 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:34,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:34,973 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:35,045 INFO L628 ElimStorePlain]: treesize reduction 42, result has 66.4 percent of original size [2021-06-05 14:44:35,048 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 3 treesize of output 1 [2021-06-05 14:44:35,049 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:35,051 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 4 treesize of output 2 [2021-06-05 14:44:35,052 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:35,108 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 14:44:35,110 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 3 treesize of output 1 [2021-06-05 14:44:35,111 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:35,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:35,139 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 4 treesize of output 2 [2021-06-05 14:44:35,139 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:35,177 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 14:44:35,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:35,178 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 14:44:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:35,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197268471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:35,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:35,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:44:35,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99666487] [2021-06-05 14:44:35,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:35,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:35,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:35,248 INFO L87 Difference]: Start difference. First operand 1371 states and 4864 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:35,741 INFO L93 Difference]: Finished difference Result 1701 states and 5782 transitions. [2021-06-05 14:44:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:44:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:35,743 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 14:44:35,743 INFO L226 Difference]: Without dead ends: 1638 [2021-06-05 14:44:35,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:44:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-06-05 14:44:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1296. [2021-06-05 14:44:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.498069498069498) internal successors, (4530), 1295 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4530 transitions. [2021-06-05 14:44:35,757 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4530 transitions. Word has length 24 [2021-06-05 14:44:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:35,758 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4530 transitions. [2021-06-05 14:44:35,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4530 transitions. [2021-06-05 14:44:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:35,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:35,759 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:35,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6124 [2021-06-05 14:44:35,959 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1355776782, now seen corresponding path program 275 times [2021-06-05 14:44:35,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:35,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169471812] [2021-06-05 14:44:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:36,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:36,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169471812] [2021-06-05 14:44:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169471812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566659214] [2021-06-05 14:44:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:36,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:36,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:36,220 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 4 treesize of output 2 [2021-06-05 14:44:36,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,242 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 14:44:36,242 INFO L518 ElimStorePlain]: Eliminatee v_prenex_219 vanished before elimination [2021-06-05 14:44:36,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:36,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:44:36,294 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 4 treesize of output 2 [2021-06-05 14:44:36,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,297 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 4 treesize of output 2 [2021-06-05 14:44:36,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:36,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:36,320 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 4 treesize of output 2 [2021-06-05 14:44:36,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,323 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 3 treesize of output 1 [2021-06-05 14:44:36,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:36,350 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:44:36,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:36,351 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:44:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:36,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566659214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:36,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:36,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:44:36,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633314880] [2021-06-05 14:44:36,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:44:36,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:44:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:44:36,388 INFO L87 Difference]: Start difference. First operand 1296 states and 4530 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:36,771 INFO L93 Difference]: Finished difference Result 1571 states and 5344 transitions. [2021-06-05 14:44:36,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:44:36,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:36,773 INFO L225 Difference]: With dead ends: 1571 [2021-06-05 14:44:36,774 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 14:44:36,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:44:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 14:44:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1335. [2021-06-05 14:44:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.505247376311844) internal successors, (4676), 1334 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4676 transitions. [2021-06-05 14:44:36,788 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4676 transitions. Word has length 24 [2021-06-05 14:44:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:36,788 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4676 transitions. [2021-06-05 14:44:36,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:36,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4676 transitions. [2021-06-05 14:44:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:36,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:36,789 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:36,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-05 14:44:36,990 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:36,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1763699870, now seen corresponding path program 276 times [2021-06-05 14:44:36,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:36,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010169222] [2021-06-05 14:44:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:37,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:37,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010169222] [2021-06-05 14:44:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010169222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:37,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399859953] [2021-06-05 14:44:37,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:37,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:44:37,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:37,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:37,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:37,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,288 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 14:44:37,289 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 4 treesize of output 2 [2021-06-05 14:44:37,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:37,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:37,300 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:44:37,404 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 3 treesize of output 1 [2021-06-05 14:44:37,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,488 INFO L628 ElimStorePlain]: treesize reduction 49, result has 65.7 percent of original size [2021-06-05 14:44:37,490 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 4 treesize of output 2 [2021-06-05 14:44:37,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,564 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 14:44:37,567 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 4 treesize of output 2 [2021-06-05 14:44:37,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,570 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 3 treesize of output 1 [2021-06-05 14:44:37,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,573 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 3 treesize of output 1 [2021-06-05 14:44:37,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,577 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 4 treesize of output 2 [2021-06-05 14:44:37,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,635 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-05 14:44:37,638 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 4 treesize of output 2 [2021-06-05 14:44:37,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,679 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-05 14:44:37,681 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 3 treesize of output 1 [2021-06-05 14:44:37,682 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:37,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:37,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:37,702 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:146, output treesize:34 [2021-06-05 14:44:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:37,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399859953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:37,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:37,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:44:37,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413735385] [2021-06-05 14:44:37,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:37,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:37,775 INFO L87 Difference]: Start difference. First operand 1335 states and 4676 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:38,163 INFO L93 Difference]: Finished difference Result 1723 states and 5814 transitions. [2021-06-05 14:44:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:44:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:38,165 INFO L225 Difference]: With dead ends: 1723 [2021-06-05 14:44:38,166 INFO L226 Difference]: Without dead ends: 1672 [2021-06-05 14:44:38,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:44:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-06-05 14:44:38,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1363. [2021-06-05 14:44:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.537444933920705) internal successors, (4818), 1362 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4818 transitions. [2021-06-05 14:44:38,181 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4818 transitions. Word has length 24 [2021-06-05 14:44:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:38,181 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4818 transitions. [2021-06-05 14:44:38,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4818 transitions. [2021-06-05 14:44:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:38,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:38,182 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:38,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6174 [2021-06-05 14:44:38,383 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash -150133136, now seen corresponding path program 277 times [2021-06-05 14:44:38,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:38,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737150005] [2021-06-05 14:44:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:38,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737150005] [2021-06-05 14:44:38,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737150005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:38,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690573165] [2021-06-05 14:44:38,491 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:38,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:38,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:38,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:38,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,664 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 14:44:38,666 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 4 treesize of output 2 [2021-06-05 14:44:38,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:38,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:38,676 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:44:38,825 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 3 treesize of output 1 [2021-06-05 14:44:38,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,829 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 3 treesize of output 1 [2021-06-05 14:44:38,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,833 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 4 treesize of output 2 [2021-06-05 14:44:38,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,837 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 4 treesize of output 2 [2021-06-05 14:44:38,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,841 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 4 treesize of output 2 [2021-06-05 14:44:38,842 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:38,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:38,848 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,851 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 3 treesize of output 1 [2021-06-05 14:44:38,852 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:38,855 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:38,944 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.1 percent of original size [2021-06-05 14:44:38,947 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 4 treesize of output 2 [2021-06-05 14:44:38,948 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,000 INFO L628 ElimStorePlain]: treesize reduction 40, result has 59.6 percent of original size [2021-06-05 14:44:39,000 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-05 14:44:39,003 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 3 treesize of output 1 [2021-06-05 14:44:39,003 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,005 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 4 treesize of output 2 [2021-06-05 14:44:39,006 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:39,045 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.2 percent of original size [2021-06-05 14:44:39,045 INFO L518 ElimStorePlain]: Eliminatee v_prenex_226 vanished before elimination [2021-06-05 14:44:39,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:39,046 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:224, output treesize:34 [2021-06-05 14:44:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690573165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:39,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:39,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:44:39,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605137284] [2021-06-05 14:44:39,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:39,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:39,120 INFO L87 Difference]: Start difference. First operand 1363 states and 4818 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:39,568 INFO L93 Difference]: Finished difference Result 1653 states and 5622 transitions. [2021-06-05 14:44:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:44:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:39,571 INFO L225 Difference]: With dead ends: 1653 [2021-06-05 14:44:39,571 INFO L226 Difference]: Without dead ends: 1590 [2021-06-05 14:44:39,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:44:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-06-05 14:44:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1310. [2021-06-05 14:44:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.4935064935064934) internal successors, (4573), 1309 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4573 transitions. [2021-06-05 14:44:39,585 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4573 transitions. Word has length 24 [2021-06-05 14:44:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:39,585 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4573 transitions. [2021-06-05 14:44:39,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4573 transitions. [2021-06-05 14:44:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:39,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:39,587 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:39,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6193,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:39,787 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:39,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 316771726, now seen corresponding path program 278 times [2021-06-05 14:44:39,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:39,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991714348] [2021-06-05 14:44:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:40,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:40,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991714348] [2021-06-05 14:44:40,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991714348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:40,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48616070] [2021-06-05 14:44:40,028 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:40,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:44:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:40,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48616070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:40,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:40,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:44:40,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972054580] [2021-06-05 14:44:40,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:44:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:44:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:40,356 INFO L87 Difference]: Start difference. First operand 1310 states and 4573 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:42,937 INFO L93 Difference]: Finished difference Result 2070 states and 6696 transitions. [2021-06-05 14:44:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 14:44:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:42,941 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 14:44:42,941 INFO L226 Difference]: Without dead ends: 1863 [2021-06-05 14:44:42,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2243.7ms TimeCoverageRelationStatistics Valid=464, Invalid=3568, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 14:44:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-06-05 14:44:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1361. [2021-06-05 14:44:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.522794117647059) internal successors, (4791), 1360 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4791 transitions. [2021-06-05 14:44:42,963 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4791 transitions. Word has length 24 [2021-06-05 14:44:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:42,963 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4791 transitions. [2021-06-05 14:44:42,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4791 transitions. [2021-06-05 14:44:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:42,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:42,965 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:43,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6228,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:43,169 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash 856040988, now seen corresponding path program 279 times [2021-06-05 14:44:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:43,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814419201] [2021-06-05 14:44:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:43,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:43,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814419201] [2021-06-05 14:44:43,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814419201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:43,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034965173] [2021-06-05 14:44:43,277 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:43,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:44:43,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:43,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:43,468 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 3 treesize of output 1 [2021-06-05 14:44:43,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,563 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.1 percent of original size [2021-06-05 14:44:43,565 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 4 treesize of output 2 [2021-06-05 14:44:43,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,569 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 4 treesize of output 2 [2021-06-05 14:44:43,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,572 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 3 treesize of output 1 [2021-06-05 14:44:43,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,621 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 14:44:43,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:44:43,622 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:58 [2021-06-05 14:44:43,696 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 4 treesize of output 2 [2021-06-05 14:44:43,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,700 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 4 treesize of output 2 [2021-06-05 14:44:43,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,703 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 4 treesize of output 2 [2021-06-05 14:44:43,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,706 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 3 treesize of output 1 [2021-06-05 14:44:43,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,775 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:44:43,778 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 4 treesize of output 2 [2021-06-05 14:44:43,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,781 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 4 treesize of output 2 [2021-06-05 14:44:43,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:43,832 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:44:43,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:44:43,834 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:44:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:43,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034965173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:43,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:43,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:44:43,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167087052] [2021-06-05 14:44:43,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:44:43,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:43,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:44:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:44:43,913 INFO L87 Difference]: Start difference. First operand 1361 states and 4791 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:44,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:44,900 INFO L93 Difference]: Finished difference Result 1718 states and 5748 transitions. [2021-06-05 14:44:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:44:44,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:44,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:44,903 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 14:44:44,903 INFO L226 Difference]: Without dead ends: 1655 [2021-06-05 14:44:44,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 899.8ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:44:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-05 14:44:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1342. [2021-06-05 14:44:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.4966442953020134) internal successors, (4689), 1341 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4689 transitions. [2021-06-05 14:44:44,918 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4689 transitions. Word has length 24 [2021-06-05 14:44:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:44,918 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4689 transitions. [2021-06-05 14:44:44,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4689 transitions. [2021-06-05 14:44:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:44,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:44,920 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:45,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6250 [2021-06-05 14:44:45,120 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1348636750, now seen corresponding path program 280 times [2021-06-05 14:44:45,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:45,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693113937] [2021-06-05 14:44:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:45,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:45,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693113937] [2021-06-05 14:44:45,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693113937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:45,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738990210] [2021-06-05 14:44:45,392 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:45,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:44:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:44:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:45,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738990210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:45,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:45,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 14:44:45,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674093001] [2021-06-05 14:44:45,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:44:45,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:44:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:45,707 INFO L87 Difference]: Start difference. First operand 1342 states and 4689 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:49,776 INFO L93 Difference]: Finished difference Result 2255 states and 7301 transitions. [2021-06-05 14:44:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 14:44:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:49,780 INFO L225 Difference]: With dead ends: 2255 [2021-06-05 14:44:49,780 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 14:44:49,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3726.2ms TimeCoverageRelationStatistics Valid=801, Invalid=4601, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 14:44:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 14:44:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1333. [2021-06-05 14:44:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.4977477477477477) internal successors, (4659), 1332 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4659 transitions. [2021-06-05 14:44:49,796 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4659 transitions. Word has length 24 [2021-06-05 14:44:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:49,796 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4659 transitions. [2021-06-05 14:44:49,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4659 transitions. [2021-06-05 14:44:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:49,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:49,798 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:49,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6266 [2021-06-05 14:44:49,998 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 257555664, now seen corresponding path program 281 times [2021-06-05 14:44:49,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:49,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619074380] [2021-06-05 14:44:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:44:50,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619074380] [2021-06-05 14:44:50,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619074380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:50,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486315944] [2021-06-05 14:44:50,159 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:50,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:44:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:44:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:50,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486315944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:50,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:50,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:44:50,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237816010] [2021-06-05 14:44:50,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:44:50,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:44:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:44:50,480 INFO L87 Difference]: Start difference. First operand 1333 states and 4659 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:54,571 INFO L93 Difference]: Finished difference Result 2603 states and 8192 transitions. [2021-06-05 14:44:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 14:44:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:54,575 INFO L225 Difference]: With dead ends: 2603 [2021-06-05 14:44:54,575 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 14:44:54,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 3644.6ms TimeCoverageRelationStatistics Valid=681, Invalid=4721, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 14:44:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 14:44:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1438. [2021-06-05 14:44:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.405010438413361) internal successors, (4893), 1437 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4893 transitions. [2021-06-05 14:44:54,597 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4893 transitions. Word has length 24 [2021-06-05 14:44:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:54,597 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4893 transitions. [2021-06-05 14:44:54,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4893 transitions. [2021-06-05 14:44:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:54,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:54,599 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:54,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6286 [2021-06-05 14:44:54,799 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash 668428116, now seen corresponding path program 282 times [2021-06-05 14:44:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:54,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856630443] [2021-06-05 14:44:54,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:44:54,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:54,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856630443] [2021-06-05 14:44:54,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856630443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:54,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707603752] [2021-06-05 14:44:54,919 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:55,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:44:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:44:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:44:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:55,091 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 4 treesize of output 2 [2021-06-05 14:44:55,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,159 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.0 percent of original size [2021-06-05 14:44:55,162 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 4 treesize of output 2 [2021-06-05 14:44:55,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:55,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-06-05 14:44:55,194 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 3 treesize of output 1 [2021-06-05 14:44:55,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:44:55,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:44:55,226 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:142, output treesize:68 [2021-06-05 14:44:55,571 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_233, ends_with_10], 1=[ends_with_6]} [2021-06-05 14:44:55,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:55,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,577 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 4 treesize of output 2 [2021-06-05 14:44:55,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,581 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 4 treesize of output 2 [2021-06-05 14:44:55,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,585 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 4 treesize of output 2 [2021-06-05 14:44:55,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:55,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:44:55,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,699 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-06-05 14:44:55,699 INFO L628 ElimStorePlain]: treesize reduction 70, result has 63.9 percent of original size [2021-06-05 14:44:55,702 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 3 treesize of output 1 [2021-06-05 14:44:55,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,705 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 3 treesize of output 1 [2021-06-05 14:44:55,706 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,764 INFO L628 ElimStorePlain]: treesize reduction 50, result has 57.6 percent of original size [2021-06-05 14:44:55,766 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 4 treesize of output 2 [2021-06-05 14:44:55,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,769 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 3 treesize of output 1 [2021-06-05 14:44:55,770 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:44:55,801 INFO L628 ElimStorePlain]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 14:44:55,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:44:55,802 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:303, output treesize:20 [2021-06-05 14:44:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:44:55,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707603752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:55,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:55,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:44:55,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387986168] [2021-06-05 14:44:55,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:44:55,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:55,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:44:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:44:55,854 INFO L87 Difference]: Start difference. First operand 1438 states and 4893 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:44:57,696 INFO L93 Difference]: Finished difference Result 1986 states and 6506 transitions. [2021-06-05 14:44:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:44:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:44:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:44:57,699 INFO L225 Difference]: With dead ends: 1986 [2021-06-05 14:44:57,699 INFO L226 Difference]: Without dead ends: 1869 [2021-06-05 14:44:57,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1465.3ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:44:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-06-05 14:44:57,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1539. [2021-06-05 14:44:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.4213263979193758) internal successors, (5262), 1538 states have internal predecessors, (5262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5262 transitions. [2021-06-05 14:44:57,723 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5262 transitions. Word has length 24 [2021-06-05 14:44:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:44:57,723 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 5262 transitions. [2021-06-05 14:44:57,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:44:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5262 transitions. [2021-06-05 14:44:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:44:57,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:44:57,726 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:44:57,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6294,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:57,933 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:44:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:44:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1920773996, now seen corresponding path program 283 times [2021-06-05 14:44:57,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:44:57,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100402148] [2021-06-05 14:44:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:44:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:58,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:44:58,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100402148] [2021-06-05 14:44:58,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100402148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:58,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335642413] [2021-06-05 14:44:58,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:44:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:44:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:44:58,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:44:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:44:58,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335642413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:44:58,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:44:58,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 14:44:58,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758394579] [2021-06-05 14:44:58,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:44:58,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:44:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:44:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:44:58,420 INFO L87 Difference]: Start difference. First operand 1539 states and 5262 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:02,163 INFO L93 Difference]: Finished difference Result 3301 states and 10511 transitions. [2021-06-05 14:45:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:45:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:02,168 INFO L225 Difference]: With dead ends: 3301 [2021-06-05 14:45:02,168 INFO L226 Difference]: Without dead ends: 3123 [2021-06-05 14:45:02,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 3237.8ms TimeCoverageRelationStatistics Valid=843, Invalid=5319, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 14:45:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-05 14:45:02,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 1630. [2021-06-05 14:45:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.481890730509515) internal successors, (5672), 1629 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5672 transitions. [2021-06-05 14:45:02,194 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5672 transitions. Word has length 24 [2021-06-05 14:45:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:02,194 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5672 transitions. [2021-06-05 14:45:02,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5672 transitions. [2021-06-05 14:45:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:02,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:02,196 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:02,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6348 [2021-06-05 14:45:02,396 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:02,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:02,396 INFO L82 PathProgramCache]: Analyzing trace with hash -235535934, now seen corresponding path program 284 times [2021-06-05 14:45:02,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:02,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48659290] [2021-06-05 14:45:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:02,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48659290] [2021-06-05 14:45:02,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48659290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:02,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745581675] [2021-06-05 14:45:02,501 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:02,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:02,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:02,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745581675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:02,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:02,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:45:02,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273492172] [2021-06-05 14:45:02,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:45:02,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:45:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:45:02,717 INFO L87 Difference]: Start difference. First operand 1630 states and 5672 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:03,515 INFO L93 Difference]: Finished difference Result 2215 states and 7479 transitions. [2021-06-05 14:45:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:45:03,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:03,519 INFO L225 Difference]: With dead ends: 2215 [2021-06-05 14:45:03,519 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 14:45:03,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:45:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 14:45:03,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1718. [2021-06-05 14:45:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4857309260337797) internal successors, (5985), 1717 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5985 transitions. [2021-06-05 14:45:03,539 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5985 transitions. Word has length 24 [2021-06-05 14:45:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:03,539 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5985 transitions. [2021-06-05 14:45:03,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5985 transitions. [2021-06-05 14:45:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:03,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:03,542 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:03,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6356 [2021-06-05 14:45:03,742 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash -458096300, now seen corresponding path program 285 times [2021-06-05 14:45:03,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:03,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132787831] [2021-06-05 14:45:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:03,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:03,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132787831] [2021-06-05 14:45:03,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132787831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:03,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419425501] [2021-06-05 14:45:03,852 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:03,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:45:03,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:45:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:04,025 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 3 treesize of output 1 [2021-06-05 14:45:04,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,112 INFO L628 ElimStorePlain]: treesize reduction 31, result has 77.7 percent of original size [2021-06-05 14:45:04,114 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 4 treesize of output 2 [2021-06-05 14:45:04,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:04,155 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-06-05 14:45:04,158 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 4 treesize of output 2 [2021-06-05 14:45:04,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,219 INFO L628 ElimStorePlain]: treesize reduction 24, result has 76.0 percent of original size [2021-06-05 14:45:04,221 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 3 treesize of output 1 [2021-06-05 14:45:04,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:04,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:45:04,253 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:142, output treesize:68 [2021-06-05 14:45:04,679 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_239], 1=[ends_with_6]} [2021-06-05 14:45:04,683 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 3 treesize of output 1 [2021-06-05 14:45:04,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,687 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 3 treesize of output 1 [2021-06-05 14:45:04,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,782 INFO L628 ElimStorePlain]: treesize reduction 273, result has 26.8 percent of original size [2021-06-05 14:45:04,784 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 4 treesize of output 2 [2021-06-05 14:45:04,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,839 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.9 percent of original size [2021-06-05 14:45:04,841 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 3 treesize of output 1 [2021-06-05 14:45:04,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,844 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 4 treesize of output 2 [2021-06-05 14:45:04,845 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:04,878 INFO L628 ElimStorePlain]: treesize reduction 20, result has 68.3 percent of original size [2021-06-05 14:45:04,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:04,879 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:379, output treesize:20 [2021-06-05 14:45:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:45:04,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419425501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:04,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:04,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-06-05 14:45:04,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939516304] [2021-06-05 14:45:04,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:45:04,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:04,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:45:04,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:45:04,933 INFO L87 Difference]: Start difference. First operand 1718 states and 5985 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:06,754 INFO L93 Difference]: Finished difference Result 2520 states and 8276 transitions. [2021-06-05 14:45:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:45:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:06,759 INFO L225 Difference]: With dead ends: 2520 [2021-06-05 14:45:06,759 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 14:45:06,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1262.0ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:45:06,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 14:45:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1751. [2021-06-05 14:45:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4937142857142858) internal successors, (6114), 1750 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6114 transitions. [2021-06-05 14:45:06,784 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6114 transitions. Word has length 24 [2021-06-05 14:45:06,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:06,784 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6114 transitions. [2021-06-05 14:45:06,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:06,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6114 transitions. [2021-06-05 14:45:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:06,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:06,786 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:06,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:06,987 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:06,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2039999204, now seen corresponding path program 286 times [2021-06-05 14:45:06,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:06,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345318292] [2021-06-05 14:45:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:07,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:07,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345318292] [2021-06-05 14:45:07,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345318292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:07,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721800012] [2021-06-05 14:45:07,157 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:07,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:07,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:07,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721800012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:07,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:07,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:45:07,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771193682] [2021-06-05 14:45:07,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:07,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:07,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:07,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:07,485 INFO L87 Difference]: Start difference. First operand 1751 states and 6114 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:11,195 INFO L93 Difference]: Finished difference Result 3157 states and 10097 transitions. [2021-06-05 14:45:11,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 14:45:11,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:11,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:11,199 INFO L225 Difference]: With dead ends: 3157 [2021-06-05 14:45:11,199 INFO L226 Difference]: Without dead ends: 2874 [2021-06-05 14:45:11,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 3245.8ms TimeCoverageRelationStatistics Valid=618, Invalid=4638, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:45:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-05 14:45:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1764. [2021-06-05 14:45:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.4951786727169596) internal successors, (6162), 1763 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 6162 transitions. [2021-06-05 14:45:11,224 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 6162 transitions. Word has length 24 [2021-06-05 14:45:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:11,224 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 6162 transitions. [2021-06-05 14:45:11,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 6162 transitions. [2021-06-05 14:45:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:11,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:11,226 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:11,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-06-05 14:45:11,426 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash 133379628, now seen corresponding path program 287 times [2021-06-05 14:45:11,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:11,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001970930] [2021-06-05 14:45:11,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:11,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001970930] [2021-06-05 14:45:11,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001970930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:11,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699033726] [2021-06-05 14:45:11,609 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:11,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:45:11,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:11,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:11,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699033726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:11,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:11,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:45:11,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381276659] [2021-06-05 14:45:11,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:11,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:11,989 INFO L87 Difference]: Start difference. First operand 1764 states and 6162 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:16,932 INFO L93 Difference]: Finished difference Result 3655 states and 11498 transitions. [2021-06-05 14:45:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 14:45:16,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:16,938 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 14:45:16,938 INFO L226 Difference]: Without dead ends: 3430 [2021-06-05 14:45:16,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 4149.8ms TimeCoverageRelationStatistics Valid=873, Invalid=6609, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 14:45:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-06-05 14:45:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 1749. [2021-06-05 14:45:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.482265446224256) internal successors, (6087), 1748 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6087 transitions. [2021-06-05 14:45:16,964 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6087 transitions. Word has length 24 [2021-06-05 14:45:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:16,964 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 6087 transitions. [2021-06-05 14:45:16,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6087 transitions. [2021-06-05 14:45:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:16,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:16,966 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:17,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6449,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:17,166 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:17,166 INFO L82 PathProgramCache]: Analyzing trace with hash -269481576, now seen corresponding path program 288 times [2021-06-05 14:45:17,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:17,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774854961] [2021-06-05 14:45:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:17,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:17,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774854961] [2021-06-05 14:45:17,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774854961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:17,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248740169] [2021-06-05 14:45:17,287 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:17,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:17,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:17,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:17,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248740169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:17,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:17,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:45:17,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647574646] [2021-06-05 14:45:17,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:17,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:17,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:17,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:17,635 INFO L87 Difference]: Start difference. First operand 1749 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:19,962 INFO L93 Difference]: Finished difference Result 2734 states and 8909 transitions. [2021-06-05 14:45:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:45:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:19,966 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 14:45:19,966 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 14:45:19,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1826.2ms TimeCoverageRelationStatistics Valid=387, Invalid=2919, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 14:45:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 14:45:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1670. [2021-06-05 14:45:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4703415218693827) internal successors, (5792), 1669 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5792 transitions. [2021-06-05 14:45:19,987 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5792 transitions. Word has length 24 [2021-06-05 14:45:19,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:19,988 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5792 transitions. [2021-06-05 14:45:19,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5792 transitions. [2021-06-05 14:45:19,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:19,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:19,990 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:20,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6459 [2021-06-05 14:45:20,190 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:20,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:20,190 INFO L82 PathProgramCache]: Analyzing trace with hash 348529114, now seen corresponding path program 289 times [2021-06-05 14:45:20,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:20,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130599642] [2021-06-05 14:45:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:20,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:20,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130599642] [2021-06-05 14:45:20,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130599642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:20,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948641433] [2021-06-05 14:45:20,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:20,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:20,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:20,468 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 4 treesize of output 2 [2021-06-05 14:45:20,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:20,471 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 4 treesize of output 2 [2021-06-05 14:45:20,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:20,474 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 4 treesize of output 2 [2021-06-05 14:45:20,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:20,513 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:45:20,515 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 4 treesize of output 2 [2021-06-05 14:45:20,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:20,518 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 3 treesize of output 1 [2021-06-05 14:45:20,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:20,545 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:45:20,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:20,546 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:45:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:20,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948641433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:20,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:20,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 14:45:20,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643478022] [2021-06-05 14:45:20,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:45:20,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:20,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:45:20,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:45:20,592 INFO L87 Difference]: Start difference. First operand 1670 states and 5792 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:20,983 INFO L93 Difference]: Finished difference Result 1982 states and 6731 transitions. [2021-06-05 14:45:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:20,983 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 24 [2021-06-05 14:45:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:20,986 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 14:45:20,986 INFO L226 Difference]: Without dead ends: 1904 [2021-06-05 14:45:20,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-06-05 14:45:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1686. [2021-06-05 14:45:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4735905044510385) internal successors, (5853), 1685 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5853 transitions. [2021-06-05 14:45:21,004 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5853 transitions. Word has length 24 [2021-06-05 14:45:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:21,004 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5853 transitions. [2021-06-05 14:45:21,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5853 transitions. [2021-06-05 14:45:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:21,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:21,006 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:21,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6467,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:21,207 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:21,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1865966586, now seen corresponding path program 290 times [2021-06-05 14:45:21,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:21,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851214661] [2021-06-05 14:45:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:21,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:21,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851214661] [2021-06-05 14:45:21,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851214661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:21,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139388646] [2021-06-05 14:45:21,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:21,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:21,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:21,488 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 4 treesize of output 2 [2021-06-05 14:45:21,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:21,491 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 4 treesize of output 2 [2021-06-05 14:45:21,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:21,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:21,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:21,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:21,513 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 4 treesize of output 2 [2021-06-05 14:45:21,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:21,516 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 3 treesize of output 1 [2021-06-05 14:45:21,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:21,543 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:45:21,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:21,544 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:45:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:21,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139388646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:21,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:21,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:45:21,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560122255] [2021-06-05 14:45:21,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:21,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:21,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:21,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:21,589 INFO L87 Difference]: Start difference. First operand 1686 states and 5853 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:21,993 INFO L93 Difference]: Finished difference Result 2113 states and 7151 transitions. [2021-06-05 14:45:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 24 [2021-06-05 14:45:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:21,995 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 14:45:21,996 INFO L226 Difference]: Without dead ends: 2044 [2021-06-05 14:45:21,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-05 14:45:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1716. [2021-06-05 14:45:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4816326530612245) internal successors, (5971), 1715 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5971 transitions. [2021-06-05 14:45:22,014 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5971 transitions. Word has length 24 [2021-06-05 14:45:22,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:22,014 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5971 transitions. [2021-06-05 14:45:22,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5971 transitions. [2021-06-05 14:45:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:22,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:22,016 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:22,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6474 [2021-06-05 14:45:22,217 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash -690475942, now seen corresponding path program 291 times [2021-06-05 14:45:22,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:22,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328741849] [2021-06-05 14:45:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:22,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:22,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328741849] [2021-06-05 14:45:22,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328741849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:22,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387787127] [2021-06-05 14:45:22,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:22,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:45:22,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:22,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:22,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387787127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:22,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:22,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746807992] [2021-06-05 14:45:22,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:22,549 INFO L87 Difference]: Start difference. First operand 1716 states and 5971 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:22,904 INFO L93 Difference]: Finished difference Result 2181 states and 7378 transitions. [2021-06-05 14:45:22,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:22,907 INFO L225 Difference]: With dead ends: 2181 [2021-06-05 14:45:22,907 INFO L226 Difference]: Without dead ends: 2121 [2021-06-05 14:45:22,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-06-05 14:45:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1750. [2021-06-05 14:45:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.509433962264151) internal successors, (6138), 1749 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 6138 transitions. [2021-06-05 14:45:22,938 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 6138 transitions. Word has length 24 [2021-06-05 14:45:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:22,938 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 6138 transitions. [2021-06-05 14:45:22,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 6138 transitions. [2021-06-05 14:45:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:22,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:22,941 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:23,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6481,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:23,141 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash 923090792, now seen corresponding path program 292 times [2021-06-05 14:45:23,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:23,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356415845] [2021-06-05 14:45:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:23,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:23,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356415845] [2021-06-05 14:45:23,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356415845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:23,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901641159] [2021-06-05 14:45:23,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:23,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:23,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:23,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:23,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901641159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:23,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:23,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:23,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899544533] [2021-06-05 14:45:23,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:23,488 INFO L87 Difference]: Start difference. First operand 1750 states and 6138 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:23,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:23,872 INFO L93 Difference]: Finished difference Result 2037 states and 6922 transitions. [2021-06-05 14:45:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:45:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:23,875 INFO L225 Difference]: With dead ends: 2037 [2021-06-05 14:45:23,875 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 14:45:23,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 306.9ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:45:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 14:45:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1662. [2021-06-05 14:45:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4659843467790488) internal successors, (5757), 1661 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5757 transitions. [2021-06-05 14:45:23,893 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5757 transitions. Word has length 24 [2021-06-05 14:45:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:23,893 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5757 transitions. [2021-06-05 14:45:23,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5757 transitions. [2021-06-05 14:45:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:23,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:23,895 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:24,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6489,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:24,095 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856550, now seen corresponding path program 293 times [2021-06-05 14:45:24,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:24,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457348992] [2021-06-05 14:45:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:24,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:24,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457348992] [2021-06-05 14:45:24,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457348992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:24,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113705376] [2021-06-05 14:45:24,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:24,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:45:24,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:24,350 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 4 treesize of output 2 [2021-06-05 14:45:24,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:24,370 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:45:24,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:24,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 14:45:24,417 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 4 treesize of output 2 [2021-06-05 14:45:24,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:24,420 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 4 treesize of output 2 [2021-06-05 14:45:24,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:24,423 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 4 treesize of output 2 [2021-06-05 14:45:24,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:24,460 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:45:24,462 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 4 treesize of output 2 [2021-06-05 14:45:24,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:24,465 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 3 treesize of output 1 [2021-06-05 14:45:24,465 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:24,492 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:45:24,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:24,493 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:45:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:24,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113705376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:24,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:24,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:45:24,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459119443] [2021-06-05 14:45:24,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:24,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:24,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:24,538 INFO L87 Difference]: Start difference. First operand 1662 states and 5757 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:24,896 INFO L93 Difference]: Finished difference Result 1959 states and 6670 transitions. [2021-06-05 14:45:24,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 24 [2021-06-05 14:45:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:24,899 INFO L225 Difference]: With dead ends: 1959 [2021-06-05 14:45:24,899 INFO L226 Difference]: Without dead ends: 1890 [2021-06-05 14:45:24,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:45:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-05 14:45:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1713. [2021-06-05 14:45:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.4696261682242993) internal successors, (5940), 1712 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5940 transitions. [2021-06-05 14:45:24,918 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5940 transitions. Word has length 24 [2021-06-05 14:45:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:24,918 INFO L482 AbstractCegarLoop]: Abstraction has 1713 states and 5940 transitions. [2021-06-05 14:45:24,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5940 transitions. [2021-06-05 14:45:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:24,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:24,920 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:25,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6500,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:25,120 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash -620365906, now seen corresponding path program 294 times [2021-06-05 14:45:25,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:25,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078455238] [2021-06-05 14:45:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:25,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:25,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078455238] [2021-06-05 14:45:25,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078455238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:25,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500640542] [2021-06-05 14:45:25,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:25,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:45:25,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:25,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:25,370 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 4 treesize of output 2 [2021-06-05 14:45:25,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,390 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:45:25,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:25,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 14:45:25,532 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 4 treesize of output 2 [2021-06-05 14:45:25,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,536 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 4 treesize of output 2 [2021-06-05 14:45:25,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,539 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 4 treesize of output 2 [2021-06-05 14:45:25,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,543 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 3 treesize of output 1 [2021-06-05 14:45:25,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:25,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,549 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 4 treesize of output 2 [2021-06-05 14:45:25,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:25,553 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,556 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 3 treesize of output 1 [2021-06-05 14:45:25,557 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,629 INFO L628 ElimStorePlain]: treesize reduction 43, result has 65.9 percent of original size [2021-06-05 14:45:25,632 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 3 treesize of output 1 [2021-06-05 14:45:25,633 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:25,682 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 4 treesize of output 2 [2021-06-05 14:45:25,683 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,686 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 3 treesize of output 1 [2021-06-05 14:45:25,686 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,741 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.9 percent of original size [2021-06-05 14:45:25,744 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 4 treesize of output 2 [2021-06-05 14:45:25,744 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:25,783 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 14:45:25,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:25,784 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 14:45:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:25,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500640542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:25,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:25,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:25,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587909851] [2021-06-05 14:45:25,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:25,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:25,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:25,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:25,857 INFO L87 Difference]: Start difference. First operand 1713 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:26,246 INFO L93 Difference]: Finished difference Result 2126 states and 7197 transitions. [2021-06-05 14:45:26,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:26,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:26,249 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 14:45:26,250 INFO L226 Difference]: Without dead ends: 2066 [2021-06-05 14:45:26,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-06-05 14:45:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1747. [2021-06-05 14:45:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.497709049255441) internal successors, (6107), 1746 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 6107 transitions. [2021-06-05 14:45:26,269 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 6107 transitions. Word has length 24 [2021-06-05 14:45:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:26,269 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 6107 transitions. [2021-06-05 14:45:26,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 6107 transitions. [2021-06-05 14:45:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:26,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:26,271 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:26,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6508 [2021-06-05 14:45:26,472 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:26,472 INFO L82 PathProgramCache]: Analyzing trace with hash 993200828, now seen corresponding path program 295 times [2021-06-05 14:45:26,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:26,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329845920] [2021-06-05 14:45:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:26,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329845920] [2021-06-05 14:45:26,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329845920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613067295] [2021-06-05 14:45:26,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:26,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:26,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:26,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:26,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,766 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 14:45:26,768 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 4 treesize of output 2 [2021-06-05 14:45:26,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:26,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:26,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:45:26,906 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 4 treesize of output 2 [2021-06-05 14:45:26,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,910 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 3 treesize of output 1 [2021-06-05 14:45:26,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:26,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,916 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 4 treesize of output 2 [2021-06-05 14:45:26,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,919 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 4 treesize of output 2 [2021-06-05 14:45:26,920 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,973 INFO L628 ElimStorePlain]: treesize reduction 43, result has 59.0 percent of original size [2021-06-05 14:45:26,975 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 3 treesize of output 1 [2021-06-05 14:45:26,976 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,978 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 4 treesize of output 2 [2021-06-05 14:45:26,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:26,981 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 4 treesize of output 2 [2021-06-05 14:45:26,981 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:27,019 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 14:45:27,019 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:45:27,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:27,020 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-05 14:45:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:27,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613067295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:27,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:27,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:27,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785583293] [2021-06-05 14:45:27,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:27,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:27,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:27,092 INFO L87 Difference]: Start difference. First operand 1747 states and 6107 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:27,479 INFO L93 Difference]: Finished difference Result 1982 states and 6741 transitions. [2021-06-05 14:45:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:45:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:27,482 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 14:45:27,482 INFO L226 Difference]: Without dead ends: 1915 [2021-06-05 14:45:27,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:45:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-06-05 14:45:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1683. [2021-06-05 14:45:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.460166468489893) internal successors, (5820), 1682 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5820 transitions. [2021-06-05 14:45:27,500 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5820 transitions. Word has length 24 [2021-06-05 14:45:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:27,500 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5820 transitions. [2021-06-05 14:45:27,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5820 transitions. [2021-06-05 14:45:27,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:27,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:27,502 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:27,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6551 [2021-06-05 14:45:27,703 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1460105690, now seen corresponding path program 296 times [2021-06-05 14:45:27,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:27,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498074394] [2021-06-05 14:45:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:27,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:27,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498074394] [2021-06-05 14:45:27,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498074394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:27,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154255608] [2021-06-05 14:45:27,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:27,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:27,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:27,987 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 4 treesize of output 2 [2021-06-05 14:45:27,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:27,990 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 3 treesize of output 1 [2021-06-05 14:45:27,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,042 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-05 14:45:28,042 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-06-05 14:45:28,044 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 4 treesize of output 2 [2021-06-05 14:45:28,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:28,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:28,069 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-05 14:45:28,143 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 3 treesize of output 1 [2021-06-05 14:45:28,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,146 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 4 treesize of output 2 [2021-06-05 14:45:28,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,149 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 4 treesize of output 2 [2021-06-05 14:45:28,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,152 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 4 treesize of output 2 [2021-06-05 14:45:28,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,222 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:45:28,225 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 4 treesize of output 2 [2021-06-05 14:45:28,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,228 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 4 treesize of output 2 [2021-06-05 14:45:28,228 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:28,279 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:45:28,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:45:28,281 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:45:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:28,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154255608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:28,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:28,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:28,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931839066] [2021-06-05 14:45:28,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:28,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:28,361 INFO L87 Difference]: Start difference. First operand 1683 states and 5820 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:28,737 INFO L93 Difference]: Finished difference Result 2009 states and 6829 transitions. [2021-06-05 14:45:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:45:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:28,740 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 14:45:28,740 INFO L226 Difference]: Without dead ends: 1949 [2021-06-05 14:45:28,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-06-05 14:45:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1736. [2021-06-05 14:45:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 3.4933717579250723) internal successors, (6061), 1735 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6061 transitions. [2021-06-05 14:45:28,759 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6061 transitions. Word has length 24 [2021-06-05 14:45:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:28,759 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 6061 transitions. [2021-06-05 14:45:28,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6061 transitions. [2021-06-05 14:45:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:28,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:28,761 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:28,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6593 [2021-06-05 14:45:28,961 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:28,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1221294872, now seen corresponding path program 297 times [2021-06-05 14:45:28,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:28,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168236257] [2021-06-05 14:45:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:29,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168236257] [2021-06-05 14:45:29,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168236257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107106205] [2021-06-05 14:45:29,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:29,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:45:29,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:29,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:29,261 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 3 treesize of output 1 [2021-06-05 14:45:29,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,264 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 4 treesize of output 2 [2021-06-05 14:45:29,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,316 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-05 14:45:29,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-06-05 14:45:29,319 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 4 treesize of output 2 [2021-06-05 14:45:29,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:29,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:29,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-05 14:45:29,416 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 4 treesize of output 2 [2021-06-05 14:45:29,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,420 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 4 treesize of output 2 [2021-06-05 14:45:29,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,423 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 4 treesize of output 2 [2021-06-05 14:45:29,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,426 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 3 treesize of output 1 [2021-06-05 14:45:29,427 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,495 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:45:29,498 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 4 treesize of output 2 [2021-06-05 14:45:29,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,501 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 4 treesize of output 2 [2021-06-05 14:45:29,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:29,552 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:45:29,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:45:29,553 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:45:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:29,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107106205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:29,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:29,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:29,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28074075] [2021-06-05 14:45:29,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:29,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:29,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:29,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:29,629 INFO L87 Difference]: Start difference. First operand 1736 states and 6061 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:30,065 INFO L93 Difference]: Finished difference Result 2012 states and 6773 transitions. [2021-06-05 14:45:30,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:45:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:30,067 INFO L225 Difference]: With dead ends: 2012 [2021-06-05 14:45:30,068 INFO L226 Difference]: Without dead ends: 1947 [2021-06-05 14:45:30,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:45:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-06-05 14:45:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1705. [2021-06-05 14:45:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.466549295774648) internal successors, (5907), 1704 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5907 transitions. [2021-06-05 14:45:30,086 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5907 transitions. Word has length 24 [2021-06-05 14:45:30,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:30,086 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5907 transitions. [2021-06-05 14:45:30,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5907 transitions. [2021-06-05 14:45:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:30,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:30,088 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:30,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6612,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:30,289 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1554633626, now seen corresponding path program 298 times [2021-06-05 14:45:30,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:30,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87775841] [2021-06-05 14:45:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:30,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:30,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87775841] [2021-06-05 14:45:30,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87775841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:30,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057764752] [2021-06-05 14:45:30,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:30,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:30,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:30,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057764752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:30,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:30,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:45:30,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756716358] [2021-06-05 14:45:30,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:30,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:30,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:30,784 INFO L87 Difference]: Start difference. First operand 1705 states and 5907 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:31,682 INFO L93 Difference]: Finished difference Result 1993 states and 6667 transitions. [2021-06-05 14:45:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:45:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:31,685 INFO L225 Difference]: With dead ends: 1993 [2021-06-05 14:45:31,685 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 14:45:31,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:45:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 14:45:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1654. [2021-06-05 14:45:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.468844525105868) internal successors, (5734), 1653 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5734 transitions. [2021-06-05 14:45:31,702 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5734 transitions. Word has length 24 [2021-06-05 14:45:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:31,702 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5734 transitions. [2021-06-05 14:45:31,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5734 transitions. [2021-06-05 14:45:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:31,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:31,704 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:31,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6631 [2021-06-05 14:45:31,904 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash 377554566, now seen corresponding path program 299 times [2021-06-05 14:45:31,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:31,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844840598] [2021-06-05 14:45:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:31,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:31,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844840598] [2021-06-05 14:45:31,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844840598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:31,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158308883] [2021-06-05 14:45:31,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:32,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:32,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:32,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:32,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:32,174 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 14:45:32,175 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 4 treesize of output 2 [2021-06-05 14:45:32,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:32,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:32,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:32,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:45:32,249 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 4 treesize of output 2 [2021-06-05 14:45:32,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:32,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:32,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:32,257 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 4 treesize of output 2 [2021-06-05 14:45:32,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:32,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:32,284 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 4 treesize of output 2 [2021-06-05 14:45:32,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:32,288 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 3 treesize of output 1 [2021-06-05 14:45:32,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:32,314 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:45:32,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:32,315 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:45:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:32,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158308883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:32,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:32,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:45:32,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319631937] [2021-06-05 14:45:32,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:45:32,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:45:32,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:45:32,359 INFO L87 Difference]: Start difference. First operand 1654 states and 5734 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:32,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:32,752 INFO L93 Difference]: Finished difference Result 1946 states and 6629 transitions. [2021-06-05 14:45:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 24 [2021-06-05 14:45:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:32,754 INFO L225 Difference]: With dead ends: 1946 [2021-06-05 14:45:32,754 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 14:45:32,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:45:32,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 14:45:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2021-06-05 14:45:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.472042377869335) internal successors, (5899), 1699 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5899 transitions. [2021-06-05 14:45:32,772 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5899 transitions. Word has length 24 [2021-06-05 14:45:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:32,772 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5899 transitions. [2021-06-05 14:45:32,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5899 transitions. [2021-06-05 14:45:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:32,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:32,774 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:32,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6650,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:32,974 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1553045210, now seen corresponding path program 300 times [2021-06-05 14:45:32,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:32,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393202968] [2021-06-05 14:45:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:33,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:33,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393202968] [2021-06-05 14:45:33,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393202968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:33,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728380730] [2021-06-05 14:45:33,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:33,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:33,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:33,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:33,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:33,260 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 4 treesize of output 2 [2021-06-05 14:45:33,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,282 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:45:33,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:45:33,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 14:45:33,377 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 4 treesize of output 2 [2021-06-05 14:45:33,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,381 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 3 treesize of output 1 [2021-06-05 14:45:33,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:33,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,388 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 3 treesize of output 1 [2021-06-05 14:45:33,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,392 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 4 treesize of output 2 [2021-06-05 14:45:33,393 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:45:33,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,398 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 3 treesize of output 1 [2021-06-05 14:45:33,399 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:33,449 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 3 treesize of output 1 [2021-06-05 14:45:33,450 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,528 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.0 percent of original size [2021-06-05 14:45:33,531 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 4 treesize of output 2 [2021-06-05 14:45:33,532 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,590 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 14:45:33,593 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 3 treesize of output 1 [2021-06-05 14:45:33,594 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:33,622 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 4 treesize of output 2 [2021-06-05 14:45:33,623 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:33,661 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-05 14:45:33,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:33,662 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:169, output treesize:34 [2021-06-05 14:45:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:33,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728380730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:33,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:33,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:33,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146770524] [2021-06-05 14:45:33,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:33,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:33,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:33,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:33,735 INFO L87 Difference]: Start difference. First operand 1700 states and 5899 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:34,179 INFO L93 Difference]: Finished difference Result 2113 states and 7156 transitions. [2021-06-05 14:45:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:34,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:34,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:34,182 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 14:45:34,182 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 14:45:34,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 14:45:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1734. [2021-06-05 14:45:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.500288517022504) internal successors, (6066), 1733 states have internal predecessors, (6066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 6066 transitions. [2021-06-05 14:45:34,201 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 6066 transitions. Word has length 24 [2021-06-05 14:45:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:34,202 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 6066 transitions. [2021-06-05 14:45:34,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:34,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 6066 transitions. [2021-06-05 14:45:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:34,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:34,204 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:34,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:34,404 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1128355352, now seen corresponding path program 301 times [2021-06-05 14:45:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:34,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351686804] [2021-06-05 14:45:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:34,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:34,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351686804] [2021-06-05 14:45:34,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351686804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:34,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113951797] [2021-06-05 14:45:34,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:34,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:34,798 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 4 treesize of output 2 [2021-06-05 14:45:34,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:34,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:34,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-05 14:45:34,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-05 14:45:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:35,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113951797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:35,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:35,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:45:35,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712452063] [2021-06-05 14:45:35,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:35,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:35,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:35,011 INFO L87 Difference]: Start difference. First operand 1734 states and 6066 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:36,541 INFO L93 Difference]: Finished difference Result 2180 states and 7268 transitions. [2021-06-05 14:45:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:45:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:36,545 INFO L225 Difference]: With dead ends: 2180 [2021-06-05 14:45:36,545 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 14:45:36,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1278.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:45:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 14:45:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1670. [2021-06-05 14:45:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4625524266027563) internal successors, (5779), 1669 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5779 transitions. [2021-06-05 14:45:36,563 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5779 transitions. Word has length 24 [2021-06-05 14:45:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:36,563 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5779 transitions. [2021-06-05 14:45:36,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5779 transitions. [2021-06-05 14:45:36,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:36,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:36,565 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:36,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6672 [2021-06-05 14:45:36,766 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash -661450490, now seen corresponding path program 302 times [2021-06-05 14:45:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:36,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497909123] [2021-06-05 14:45:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:36,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:36,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497909123] [2021-06-05 14:45:36,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497909123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:36,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087916625] [2021-06-05 14:45:36,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:36,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:37,041 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 3 treesize of output 1 [2021-06-05 14:45:37,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,116 INFO L628 ElimStorePlain]: treesize reduction 53, result has 62.4 percent of original size [2021-06-05 14:45:37,117 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-06-05 14:45:37,119 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 4 treesize of output 2 [2021-06-05 14:45:37,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,122 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 3 treesize of output 1 [2021-06-05 14:45:37,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:37,156 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 4 treesize of output 2 [2021-06-05 14:45:37,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,204 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-05 14:45:37,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:37,205 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:144, output treesize:58 [2021-06-05 14:45:37,274 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 3 treesize of output 1 [2021-06-05 14:45:37,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,278 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 4 treesize of output 2 [2021-06-05 14:45:37,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,281 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 4 treesize of output 2 [2021-06-05 14:45:37,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,284 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 4 treesize of output 2 [2021-06-05 14:45:37,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,355 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:45:37,357 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 4 treesize of output 2 [2021-06-05 14:45:37,358 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,360 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 4 treesize of output 2 [2021-06-05 14:45:37,361 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:37,412 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:45:37,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:45:37,413 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:45:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:37,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087916625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:37,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:37,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:37,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338812707] [2021-06-05 14:45:37,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:37,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:37,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:37,491 INFO L87 Difference]: Start difference. First operand 1670 states and 5779 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:37,904 INFO L93 Difference]: Finished difference Result 1989 states and 6754 transitions. [2021-06-05 14:45:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:45:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:45:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:37,908 INFO L225 Difference]: With dead ends: 1989 [2021-06-05 14:45:37,908 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 14:45:37,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 14:45:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1716. [2021-06-05 14:45:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4903790087463555) internal successors, (5986), 1715 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5986 transitions. [2021-06-05 14:45:37,926 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5986 transitions. Word has length 24 [2021-06-05 14:45:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:37,926 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5986 transitions. [2021-06-05 14:45:37,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5986 transitions. [2021-06-05 14:45:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:37,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:37,928 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:38,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6710,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:38,129 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash 952116244, now seen corresponding path program 303 times [2021-06-05 14:45:38,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:38,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96439381] [2021-06-05 14:45:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:38,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:38,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96439381] [2021-06-05 14:45:38,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96439381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:38,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387270891] [2021-06-05 14:45:38,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:38,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:45:38,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:38,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:38,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:38,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387270891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:38,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:38,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:45:38,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183386236] [2021-06-05 14:45:38,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:38,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:38,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:38,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:38,605 INFO L87 Difference]: Start difference. First operand 1716 states and 5986 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:40,067 INFO L93 Difference]: Finished difference Result 2227 states and 7324 transitions. [2021-06-05 14:45:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:45:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:40,071 INFO L225 Difference]: With dead ends: 2227 [2021-06-05 14:45:40,071 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 14:45:40,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1153.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 14:45:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 14:45:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1673. [2021-06-05 14:45:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.4671052631578947) internal successors, (5797), 1672 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5797 transitions. [2021-06-05 14:45:40,090 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5797 transitions. Word has length 24 [2021-06-05 14:45:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:40,090 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5797 transitions. [2021-06-05 14:45:40,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5797 transitions. [2021-06-05 14:45:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:40,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:40,092 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:40,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6726 [2021-06-05 14:45:40,293 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash -591340454, now seen corresponding path program 304 times [2021-06-05 14:45:40,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:40,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176192189] [2021-06-05 14:45:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:40,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:40,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176192189] [2021-06-05 14:45:40,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176192189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:40,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387359288] [2021-06-05 14:45:40,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:40,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:40,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:40,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387359288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:40,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:40,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:45:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745699722] [2021-06-05 14:45:40,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:40,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:40,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:40,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:40,780 INFO L87 Difference]: Start difference. First operand 1673 states and 5797 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:42,956 INFO L93 Difference]: Finished difference Result 2322 states and 7662 transitions. [2021-06-05 14:45:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 14:45:42,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:42,959 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 14:45:42,959 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 14:45:42,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1759.2ms TimeCoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 14:45:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 14:45:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1686. [2021-06-05 14:45:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4949554896142434) internal successors, (5889), 1685 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5889 transitions. [2021-06-05 14:45:42,980 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5889 transitions. Word has length 24 [2021-06-05 14:45:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:42,980 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5889 transitions. [2021-06-05 14:45:42,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5889 transitions. [2021-06-05 14:45:42,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:42,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:42,982 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:43,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6751 [2021-06-05 14:45:43,182 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:43,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1349954870, now seen corresponding path program 305 times [2021-06-05 14:45:43,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:43,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687096419] [2021-06-05 14:45:43,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:43,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687096419] [2021-06-05 14:45:43,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687096419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836212695] [2021-06-05 14:45:43,399 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:43,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:43,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:43,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836212695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:43,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:43,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 14:45:43,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349115601] [2021-06-05 14:45:43,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:43,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:43,788 INFO L87 Difference]: Start difference. First operand 1686 states and 5889 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:45,708 INFO L93 Difference]: Finished difference Result 2053 states and 6839 transitions. [2021-06-05 14:45:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:45:45,709 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:45,711 INFO L225 Difference]: With dead ends: 2053 [2021-06-05 14:45:45,711 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 14:45:45,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1559.4ms TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 14:45:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 14:45:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1672. [2021-06-05 14:45:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.485338120885697) internal successors, (5824), 1671 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5824 transitions. [2021-06-05 14:45:45,729 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5824 transitions. Word has length 24 [2021-06-05 14:45:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:45,729 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5824 transitions. [2021-06-05 14:45:45,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5824 transitions. [2021-06-05 14:45:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:45,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:45,731 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:45,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6769 [2021-06-05 14:45:45,932 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1601280286, now seen corresponding path program 306 times [2021-06-05 14:45:45,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:45,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87021531] [2021-06-05 14:45:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:46,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:46,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87021531] [2021-06-05 14:45:46,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87021531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:46,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138281741] [2021-06-05 14:45:46,027 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:46,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:45:46,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:46,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:46,191 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 5 treesize of output 1 [2021-06-05 14:45:46,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,270 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 14:45:46,273 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 6 treesize of output 2 [2021-06-05 14:45:46,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,330 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 14:45:46,330 INFO L518 ElimStorePlain]: Eliminatee v_prenex_257 vanished before elimination [2021-06-05 14:45:46,333 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 6 treesize of output 2 [2021-06-05 14:45:46,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,335 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 5 treesize of output 1 [2021-06-05 14:45:46,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:46,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:46,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 14:45:46,488 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 4 treesize of output 2 [2021-06-05 14:45:46,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,491 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 3 treesize of output 1 [2021-06-05 14:45:46,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:46,510 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 4 treesize of output 2 [2021-06-05 14:45:46,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:46,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:46,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:46,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 14:45:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:46,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138281741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:46,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:46,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:46,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443166604] [2021-06-05 14:45:46,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:46,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:46,552 INFO L87 Difference]: Start difference. First operand 1672 states and 5824 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:47,164 INFO L93 Difference]: Finished difference Result 1974 states and 6688 transitions. [2021-06-05 14:45:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:45:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:47,167 INFO L225 Difference]: With dead ends: 1974 [2021-06-05 14:45:47,167 INFO L226 Difference]: Without dead ends: 1899 [2021-06-05 14:45:47,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 552.1ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:45:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-05 14:45:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1672. [2021-06-05 14:45:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.473967684021544) internal successors, (5805), 1671 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5805 transitions. [2021-06-05 14:45:47,184 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5805 transitions. Word has length 24 [2021-06-05 14:45:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:47,184 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5805 transitions. [2021-06-05 14:45:47,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5805 transitions. [2021-06-05 14:45:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:47,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:47,186 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:47,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6785 [2021-06-05 14:45:47,387 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash -308120276, now seen corresponding path program 307 times [2021-06-05 14:45:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:47,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021338546] [2021-06-05 14:45:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:47,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:47,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021338546] [2021-06-05 14:45:47,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021338546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:47,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569764430] [2021-06-05 14:45:47,478 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:47,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:45:47,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:47,650 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 5 treesize of output 1 [2021-06-05 14:45:47,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:47,721 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 14:45:47,724 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 6 treesize of output 2 [2021-06-05 14:45:47,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:47,778 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 14:45:47,780 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 6 treesize of output 2 [2021-06-05 14:45:47,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:47,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:47,808 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 5 treesize of output 1 [2021-06-05 14:45:47,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:47,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:47,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:47,834 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:111, output treesize:62 [2021-06-05 14:45:47,945 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 3 treesize of output 1 [2021-06-05 14:45:47,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:47,948 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 4 treesize of output 2 [2021-06-05 14:45:47,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:47,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:47,965 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 4 treesize of output 2 [2021-06-05 14:45:47,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:45:47,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:45:47,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:45:47,981 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 14:45:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:48,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569764430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:48,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:48,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:45:48,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900008755] [2021-06-05 14:45:48,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:45:48,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:48,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:45:48,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:45:48,006 INFO L87 Difference]: Start difference. First operand 1672 states and 5805 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:48,790 INFO L93 Difference]: Finished difference Result 1887 states and 6401 transitions. [2021-06-05 14:45:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:45:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:48,793 INFO L225 Difference]: With dead ends: 1887 [2021-06-05 14:45:48,793 INFO L226 Difference]: Without dead ends: 1794 [2021-06-05 14:45:48,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 685.4ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:45:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-05 14:45:48,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1670. [2021-06-05 14:45:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-05 14:45:48,811 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-05 14:45:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:48,811 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-05 14:45:48,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-05 14:45:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:48,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:48,813 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:49,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6799,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:49,013 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:49,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1902468142, now seen corresponding path program 308 times [2021-06-05 14:45:49,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:49,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048799624] [2021-06-05 14:45:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:49,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:49,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048799624] [2021-06-05 14:45:49,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048799624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:49,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6430364] [2021-06-05 14:45:49,152 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:49,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:45:49,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:49,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:49,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:49,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6430364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:49,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:49,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:45:49,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073324379] [2021-06-05 14:45:49,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:49,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:49,466 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:51,211 INFO L93 Difference]: Finished difference Result 2329 states and 7648 transitions. [2021-06-05 14:45:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:45:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:51,214 INFO L225 Difference]: With dead ends: 2329 [2021-06-05 14:45:51,214 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 14:45:51,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1416.4ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:45:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 14:45:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1693. [2021-06-05 14:45:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.4680851063829787) internal successors, (5868), 1692 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5868 transitions. [2021-06-05 14:45:51,234 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5868 transitions. Word has length 24 [2021-06-05 14:45:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:51,234 INFO L482 AbstractCegarLoop]: Abstraction has 1693 states and 5868 transitions. [2021-06-05 14:45:51,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5868 transitions. [2021-06-05 14:45:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:51,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:51,236 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:51,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6816 [2021-06-05 14:45:51,437 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1695049814, now seen corresponding path program 309 times [2021-06-05 14:45:51,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:51,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377022105] [2021-06-05 14:45:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:51,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:51,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377022105] [2021-06-05 14:45:51,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377022105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:51,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696394008] [2021-06-05 14:45:51,595 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:51,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:45:51,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:51,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:51,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696394008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:51,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:51,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:45:51,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874244424] [2021-06-05 14:45:51,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:51,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:51,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:51,948 INFO L87 Difference]: Start difference. First operand 1693 states and 5868 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:54,735 INFO L93 Difference]: Finished difference Result 2838 states and 9112 transitions. [2021-06-05 14:45:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 14:45:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:54,739 INFO L225 Difference]: With dead ends: 2838 [2021-06-05 14:45:54,739 INFO L226 Difference]: Without dead ends: 2628 [2021-06-05 14:45:54,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2363.7ms TimeCoverageRelationStatistics Valid=471, Invalid=3435, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 14:45:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-06-05 14:45:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1719. [2021-06-05 14:45:54,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.470896391152503) internal successors, (5963), 1718 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5963 transitions. [2021-06-05 14:45:54,762 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5963 transitions. Word has length 24 [2021-06-05 14:45:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:54,762 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5963 transitions. [2021-06-05 14:45:54,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5963 transitions. [2021-06-05 14:45:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:54,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:54,764 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:54,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6822,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:54,964 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:54,965 INFO L82 PathProgramCache]: Analyzing trace with hash 887134254, now seen corresponding path program 310 times [2021-06-05 14:45:54,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:54,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597946374] [2021-06-05 14:45:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:45:55,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:55,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597946374] [2021-06-05 14:45:55,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597946374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:55,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529561850] [2021-06-05 14:45:55,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:55,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:45:55,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:55,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529561850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:55,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:55,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 14:45:55,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185338936] [2021-06-05 14:45:55,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:45:55,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:45:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:45:55,426 INFO L87 Difference]: Start difference. First operand 1719 states and 5963 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:45:57,133 INFO L93 Difference]: Finished difference Result 2452 states and 8102 transitions. [2021-06-05 14:45:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:45:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:45:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:45:57,137 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 14:45:57,137 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 14:45:57,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1378.3ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:45:57,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 14:45:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1751. [2021-06-05 14:45:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4977142857142858) internal successors, (6121), 1750 states have internal predecessors, (6121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6121 transitions. [2021-06-05 14:45:57,160 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6121 transitions. Word has length 24 [2021-06-05 14:45:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:45:57,161 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6121 transitions. [2021-06-05 14:45:57,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:45:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6121 transitions. [2021-06-05 14:45:57,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:45:57,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:45:57,163 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:45:57,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6830,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:57,363 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:45:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:45:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash -660978942, now seen corresponding path program 311 times [2021-06-05 14:45:57,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:45:57,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412387572] [2021-06-05 14:45:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:45:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:45:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:45:57,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:45:57,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412387572] [2021-06-05 14:45:57,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412387572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:57,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848792827] [2021-06-05 14:45:57,522 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:45:57,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:45:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:45:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:45:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:45:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:45:57,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848792827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:45:57,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:45:57,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 14:45:57,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056757586] [2021-06-05 14:45:57,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:45:57,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:45:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:45:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:45:57,856 INFO L87 Difference]: Start difference. First operand 1751 states and 6121 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:00,136 INFO L93 Difference]: Finished difference Result 2641 states and 8576 transitions. [2021-06-05 14:46:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:46:00,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:00,140 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 14:46:00,140 INFO L226 Difference]: Without dead ends: 2503 [2021-06-05 14:46:00,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1806.1ms TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:46:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-06-05 14:46:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1670. [2021-06-05 14:46:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-05 14:46:00,162 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-05 14:46:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:00,162 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-05 14:46:00,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-05 14:46:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:00,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:00,164 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:00,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6838,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:00,365 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:00,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:00,365 INFO L82 PathProgramCache]: Analyzing trace with hash 848323318, now seen corresponding path program 312 times [2021-06-05 14:46:00,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:00,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300926180] [2021-06-05 14:46:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:00,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:00,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300926180] [2021-06-05 14:46:00,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300926180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:00,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838177790] [2021-06-05 14:46:00,487 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:00,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:46:00,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:46:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:46:00,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838177790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:00,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:00,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 14:46:00,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951973863] [2021-06-05 14:46:00,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:00,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:00,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:00,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:00,793 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:02,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:02,905 INFO L93 Difference]: Finished difference Result 2977 states and 9542 transitions. [2021-06-05 14:46:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:46:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:02,908 INFO L225 Difference]: With dead ends: 2977 [2021-06-05 14:46:02,908 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 14:46:02,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1695.1ms TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 14:46:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 14:46:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1677. [2021-06-05 14:46:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.4665871121718377) internal successors, (5810), 1676 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5810 transitions. [2021-06-05 14:46:02,930 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5810 transitions. Word has length 24 [2021-06-05 14:46:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:02,930 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5810 transitions. [2021-06-05 14:46:02,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5810 transitions. [2021-06-05 14:46:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:02,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:02,932 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:03,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6846 [2021-06-05 14:46:03,132 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:03,133 INFO L82 PathProgramCache]: Analyzing trace with hash -864459910, now seen corresponding path program 313 times [2021-06-05 14:46:03,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:03,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044873987] [2021-06-05 14:46:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:03,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044873987] [2021-06-05 14:46:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044873987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161185331] [2021-06-05 14:46:03,237 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:03,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:46:03,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:46:03,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161185331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:03,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:03,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 14:46:03,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503315734] [2021-06-05 14:46:03,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:03,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:03,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:03,545 INFO L87 Difference]: Start difference. First operand 1677 states and 5810 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:05,044 INFO L93 Difference]: Finished difference Result 2771 states and 9108 transitions. [2021-06-05 14:46:05,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:46:05,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:05,048 INFO L225 Difference]: With dead ends: 2771 [2021-06-05 14:46:05,048 INFO L226 Difference]: Without dead ends: 2606 [2021-06-05 14:46:05,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 994.2ms TimeCoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:46:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-05 14:46:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1683. [2021-06-05 14:46:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.4863258026159336) internal successors, (5864), 1682 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5864 transitions. [2021-06-05 14:46:05,073 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5864 transitions. Word has length 24 [2021-06-05 14:46:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:05,073 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5864 transitions. [2021-06-05 14:46:05,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5864 transitions. [2021-06-05 14:46:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:05,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:05,075 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:05,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6854,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:05,275 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1186831674, now seen corresponding path program 314 times [2021-06-05 14:46:05,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:05,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515930083] [2021-06-05 14:46:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:05,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:05,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515930083] [2021-06-05 14:46:05,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515930083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:05,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749685395] [2021-06-05 14:46:05,355 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:05,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:05,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:05,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749685395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:05,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:05,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:46:05,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919938288] [2021-06-05 14:46:05,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:46:05,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:05,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:46:05,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:46:05,705 INFO L87 Difference]: Start difference. First operand 1683 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:05,937 INFO L93 Difference]: Finished difference Result 1907 states and 6473 transitions. [2021-06-05 14:46:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:46:05,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:05,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:05,939 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 14:46:05,940 INFO L226 Difference]: Without dead ends: 1832 [2021-06-05 14:46:05,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:46:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-05 14:46:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1627. [2021-06-05 14:46:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 3.458179581795818) internal successors, (5623), 1626 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 5623 transitions. [2021-06-05 14:46:05,957 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 5623 transitions. Word has length 24 [2021-06-05 14:46:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:05,957 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 5623 transitions. [2021-06-05 14:46:05,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 5623 transitions. [2021-06-05 14:46:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:05,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:05,959 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:06,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6862 [2021-06-05 14:46:06,160 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1721159154, now seen corresponding path program 315 times [2021-06-05 14:46:06,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:06,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838803342] [2021-06-05 14:46:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838803342] [2021-06-05 14:46:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838803342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835158447] [2021-06-05 14:46:06,294 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:06,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:46:06,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:06,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835158447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:06,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:06,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:46:06,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955845219] [2021-06-05 14:46:06,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:46:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:46:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:46:06,627 INFO L87 Difference]: Start difference. First operand 1627 states and 5623 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:09,427 INFO L93 Difference]: Finished difference Result 2439 states and 7890 transitions. [2021-06-05 14:46:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 14:46:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:09,431 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 14:46:09,431 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 14:46:09,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2454.7ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 14:46:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 14:46:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1621. [2021-06-05 14:46:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.45) internal successors, (5589), 1620 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5589 transitions. [2021-06-05 14:46:09,458 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5589 transitions. Word has length 24 [2021-06-05 14:46:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:09,458 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5589 transitions. [2021-06-05 14:46:09,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5589 transitions. [2021-06-05 14:46:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:09,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:09,460 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:09,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6887,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:09,660 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:09,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1073438964, now seen corresponding path program 316 times [2021-06-05 14:46:09,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:09,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762747362] [2021-06-05 14:46:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:09,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:09,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762747362] [2021-06-05 14:46:09,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762747362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:09,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536135749] [2021-06-05 14:46:09,752 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:09,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:09,895 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 4 treesize of output 2 [2021-06-05 14:46:09,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:09,917 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 14:46:09,917 INFO L518 ElimStorePlain]: Eliminatee v_prenex_261 vanished before elimination [2021-06-05 14:46:09,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:09,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:46:09,963 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 4 treesize of output 2 [2021-06-05 14:46:09,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:09,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:09,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:09,969 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 4 treesize of output 2 [2021-06-05 14:46:09,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:09,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:09,989 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 3 treesize of output 1 [2021-06-05 14:46:09,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:09,991 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 4 treesize of output 2 [2021-06-05 14:46:09,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:10,019 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:46:10,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:10,020 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:46:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:10,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536135749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:10,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:10,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:46:10,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520587482] [2021-06-05 14:46:10,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:46:10,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:46:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:46:10,065 INFO L87 Difference]: Start difference. First operand 1621 states and 5589 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:10,642 INFO L93 Difference]: Finished difference Result 1957 states and 6615 transitions. [2021-06-05 14:46:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 24 [2021-06-05 14:46:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:10,645 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 14:46:10,645 INFO L226 Difference]: Without dead ends: 1888 [2021-06-05 14:46:10,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:46:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-05 14:46:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1651. [2021-06-05 14:46:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4593939393939395) internal successors, (5708), 1650 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5708 transitions. [2021-06-05 14:46:10,663 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5708 transitions. Word has length 24 [2021-06-05 14:46:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:10,663 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5708 transitions. [2021-06-05 14:46:10,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5708 transitions. [2021-06-05 14:46:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:10,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:10,665 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:10,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6899,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:10,865 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:10,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2046037688, now seen corresponding path program 317 times [2021-06-05 14:46:10,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:10,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026424554] [2021-06-05 14:46:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:10,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:10,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026424554] [2021-06-05 14:46:10,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026424554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:10,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842271756] [2021-06-05 14:46:10,959 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:11,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:46:11,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:11,116 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 4 treesize of output 2 [2021-06-05 14:46:11,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,139 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 14:46:11,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-06-05 14:46:11,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:11,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:46:11,251 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 3 treesize of output 1 [2021-06-05 14:46:11,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,254 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 4 treesize of output 2 [2021-06-05 14:46:11,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,258 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 3 treesize of output 1 [2021-06-05 14:46:11,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,262 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 4 treesize of output 2 [2021-06-05 14:46:11,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:11,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:11,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,345 INFO L628 ElimStorePlain]: treesize reduction 43, result has 67.4 percent of original size [2021-06-05 14:46:11,348 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 3 treesize of output 1 [2021-06-05 14:46:11,349 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,351 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 3 treesize of output 1 [2021-06-05 14:46:11,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,354 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 4 treesize of output 2 [2021-06-05 14:46:11,355 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,357 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 4 treesize of output 2 [2021-06-05 14:46:11,358 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,416 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-05 14:46:11,419 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 4 treesize of output 2 [2021-06-05 14:46:11,420 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:11,459 INFO L628 ElimStorePlain]: treesize reduction 19, result has 72.5 percent of original size [2021-06-05 14:46:11,459 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-06-05 14:46:11,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:11,460 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-05 14:46:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:11,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842271756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:11,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:11,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:46:11,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750119224] [2021-06-05 14:46:11,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:46:11,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:46:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:46:11,533 INFO L87 Difference]: Start difference. First operand 1651 states and 5708 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:12,086 INFO L93 Difference]: Finished difference Result 2130 states and 7161 transitions. [2021-06-05 14:46:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:46:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:12,089 INFO L225 Difference]: With dead ends: 2130 [2021-06-05 14:46:12,089 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 14:46:12,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:46:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 14:46:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1684. [2021-06-05 14:46:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4878193701723115) internal successors, (5870), 1683 states have internal predecessors, (5870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5870 transitions. [2021-06-05 14:46:12,108 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5870 transitions. Word has length 24 [2021-06-05 14:46:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:12,108 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5870 transitions. [2021-06-05 14:46:12,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5870 transitions. [2021-06-05 14:46:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:12,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:12,110 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:12,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6906 [2021-06-05 14:46:12,310 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:12,311 INFO L82 PathProgramCache]: Analyzing trace with hash -432470954, now seen corresponding path program 318 times [2021-06-05 14:46:12,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:12,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99836888] [2021-06-05 14:46:12,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:12,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:12,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99836888] [2021-06-05 14:46:12,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99836888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:12,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838599374] [2021-06-05 14:46:12,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:12,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:46:12,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:12,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:12,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:12,540 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 4 treesize of output 2 [2021-06-05 14:46:12,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,561 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:46:12,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:12,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 14:46:12,708 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 4 treesize of output 2 [2021-06-05 14:46:12,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,713 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 3 treesize of output 1 [2021-06-05 14:46:12,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:12,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:12,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,724 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 4 treesize of output 2 [2021-06-05 14:46:12,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,778 INFO L628 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2021-06-05 14:46:12,780 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 4 treesize of output 2 [2021-06-05 14:46:12,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,783 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 4 treesize of output 2 [2021-06-05 14:46:12,784 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,786 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 3 treesize of output 1 [2021-06-05 14:46:12,787 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:12,824 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 14:46:12,824 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:46:12,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:12,825 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-05 14:46:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:12,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838599374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:12,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:12,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:46:12,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476817395] [2021-06-05 14:46:12,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:46:12,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:46:12,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:46:12,886 INFO L87 Difference]: Start difference. First operand 1684 states and 5870 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:13,599 INFO L93 Difference]: Finished difference Result 2020 states and 6804 transitions. [2021-06-05 14:46:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:46:13,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:13,602 INFO L225 Difference]: With dead ends: 2020 [2021-06-05 14:46:13,602 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 14:46:13,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:46:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 14:46:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1623. [2021-06-05 14:46:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.4494451294697903) internal successors, (5595), 1622 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5595 transitions. [2021-06-05 14:46:13,619 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5595 transitions. Word has length 24 [2021-06-05 14:46:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:13,619 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5595 transitions. [2021-06-05 14:46:13,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5595 transitions. [2021-06-05 14:46:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:13,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:13,621 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:13,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6936,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:13,822 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:13,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:13,822 INFO L82 PathProgramCache]: Analyzing trace with hash 34433908, now seen corresponding path program 319 times [2021-06-05 14:46:13,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:13,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891128869] [2021-06-05 14:46:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:13,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:13,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891128869] [2021-06-05 14:46:13,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891128869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:13,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526143808] [2021-06-05 14:46:13,954 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:14,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:14,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:14,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526143808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:14,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:14,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:46:14,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232369121] [2021-06-05 14:46:14,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:46:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:46:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:46:14,258 INFO L87 Difference]: Start difference. First operand 1623 states and 5595 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:16,577 INFO L93 Difference]: Finished difference Result 2438 states and 7938 transitions. [2021-06-05 14:46:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 14:46:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:16,580 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 14:46:16,580 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 14:46:16,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1879.9ms TimeCoverageRelationStatistics Valid=574, Invalid=4682, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:46:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 14:46:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1641. [2021-06-05 14:46:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 3.479878048780488) internal successors, (5707), 1640 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:16,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 5707 transitions. [2021-06-05 14:46:16,601 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 5707 transitions. Word has length 24 [2021-06-05 14:46:16,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:16,601 INFO L482 AbstractCegarLoop]: Abstraction has 1641 states and 5707 transitions. [2021-06-05 14:46:16,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 5707 transitions. [2021-06-05 14:46:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:16,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:16,603 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:16,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6965,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:16,803 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash 104543944, now seen corresponding path program 320 times [2021-06-05 14:46:16,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:16,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282078925] [2021-06-05 14:46:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:16,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282078925] [2021-06-05 14:46:16,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282078925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:16,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574369267] [2021-06-05 14:46:16,956 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:17,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:17,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:17,112 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 6 treesize of output 2 [2021-06-05 14:46:17,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,171 INFO L628 ElimStorePlain]: treesize reduction 58, result has 55.7 percent of original size [2021-06-05 14:46:17,171 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-06-05 14:46:17,173 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 6 treesize of output 2 [2021-06-05 14:46:17,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:17,202 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 5 treesize of output 1 [2021-06-05 14:46:17,202 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:17,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:17,227 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 14:46:17,344 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 4 treesize of output 2 [2021-06-05 14:46:17,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,348 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 4 treesize of output 2 [2021-06-05 14:46:17,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,351 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 4 treesize of output 2 [2021-06-05 14:46:17,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,354 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 3 treesize of output 1 [2021-06-05 14:46:17,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,423 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:46:17,425 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 4 treesize of output 2 [2021-06-05 14:46:17,426 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,428 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 4 treesize of output 2 [2021-06-05 14:46:17,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:17,479 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:46:17,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:17,480 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:46:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:17,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574369267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:17,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:17,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-06-05 14:46:17,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694568001] [2021-06-05 14:46:17,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:17,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:17,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:17,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:17,565 INFO L87 Difference]: Start difference. First operand 1641 states and 5707 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:19,658 INFO L93 Difference]: Finished difference Result 2328 states and 7668 transitions. [2021-06-05 14:46:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 14:46:19,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:19,661 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 14:46:19,661 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 14:46:19,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1643.7ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 14:46:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 14:46:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1656. [2021-06-05 14:46:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.4924471299093653) internal successors, (5780), 1655 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5780 transitions. [2021-06-05 14:46:19,682 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5780 transitions. Word has length 24 [2021-06-05 14:46:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:19,682 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5780 transitions. [2021-06-05 14:46:19,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5780 transitions. [2021-06-05 14:46:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:19,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:19,684 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:19,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6974,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:19,884 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash 353509398, now seen corresponding path program 321 times [2021-06-05 14:46:19,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:19,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572308486] [2021-06-05 14:46:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:20,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:20,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572308486] [2021-06-05 14:46:20,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572308486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:20,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091931671] [2021-06-05 14:46:20,049 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:20,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:46:20,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:20,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:20,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:20,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091931671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:20,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:20,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:46:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085991577] [2021-06-05 14:46:20,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:46:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:46:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:46:20,387 INFO L87 Difference]: Start difference. First operand 1656 states and 5780 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:22,370 INFO L93 Difference]: Finished difference Result 2232 states and 7426 transitions. [2021-06-05 14:46:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:46:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:22,373 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 14:46:22,373 INFO L226 Difference]: Without dead ends: 2058 [2021-06-05 14:46:22,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1571.7ms TimeCoverageRelationStatistics Valid=372, Invalid=3410, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 14:46:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-05 14:46:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1654. [2021-06-05 14:46:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.4827586206896552) internal successors, (5757), 1653 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5757 transitions. [2021-06-05 14:46:22,391 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5757 transitions. Word has length 24 [2021-06-05 14:46:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:22,391 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5757 transitions. [2021-06-05 14:46:22,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5757 transitions. [2021-06-05 14:46:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:22,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:22,393 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:22,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6985,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:22,594 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:22,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 643781646, now seen corresponding path program 322 times [2021-06-05 14:46:22,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:22,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117622966] [2021-06-05 14:46:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:22,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:22,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117622966] [2021-06-05 14:46:22,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117622966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:22,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88192660] [2021-06-05 14:46:22,675 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:22,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:22,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:22,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:22,841 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 4 treesize of output 2 [2021-06-05 14:46:22,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,844 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 4 treesize of output 2 [2021-06-05 14:46:22,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,846 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 4 treesize of output 2 [2021-06-05 14:46:22,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,882 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:46:22,884 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 3 treesize of output 1 [2021-06-05 14:46:22,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,887 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 4 treesize of output 2 [2021-06-05 14:46:22,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:22,913 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:46:22,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:22,914 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:46:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:22,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88192660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:22,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:22,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 14:46:22,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421012427] [2021-06-05 14:46:22,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:46:22,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:46:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:46:22,958 INFO L87 Difference]: Start difference. First operand 1654 states and 5757 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:23,634 INFO L93 Difference]: Finished difference Result 1923 states and 6557 transitions. [2021-06-05 14:46:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:23,635 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 24 [2021-06-05 14:46:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:23,637 INFO L225 Difference]: With dead ends: 1923 [2021-06-05 14:46:23,637 INFO L226 Difference]: Without dead ends: 1845 [2021-06-05 14:46:23,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:46:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-06-05 14:46:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1635. [2021-06-05 14:46:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.4871481028151776) internal successors, (5698), 1634 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5698 transitions. [2021-06-05 14:46:23,654 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5698 transitions. Word has length 24 [2021-06-05 14:46:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:23,654 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5698 transitions. [2021-06-05 14:46:23,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5698 transitions. [2021-06-05 14:46:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:23,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:23,656 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:23,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6994 [2021-06-05 14:46:23,857 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:23,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1570714054, now seen corresponding path program 323 times [2021-06-05 14:46:23,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:23,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398242869] [2021-06-05 14:46:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:23,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:23,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398242869] [2021-06-05 14:46:23,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398242869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:23,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237832253] [2021-06-05 14:46:23,951 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:24,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:46:24,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:24,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:24,160 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 4 treesize of output 2 [2021-06-05 14:46:24,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,163 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 4 treesize of output 2 [2021-06-05 14:46:24,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,166 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 4 treesize of output 2 [2021-06-05 14:46:24,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,204 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:46:24,205 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 3 treesize of output 1 [2021-06-05 14:46:24,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,208 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 4 treesize of output 2 [2021-06-05 14:46:24,209 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:24,235 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:46:24,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:24,236 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:46:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:24,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237832253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:24,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:24,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:46:24,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755122517] [2021-06-05 14:46:24,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:46:24,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:24,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:46:24,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:46:24,281 INFO L87 Difference]: Start difference. First operand 1635 states and 5698 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:24,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:24,998 INFO L93 Difference]: Finished difference Result 2066 states and 7013 transitions. [2021-06-05 14:46:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:24,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 24 [2021-06-05 14:46:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:25,001 INFO L225 Difference]: With dead ends: 2066 [2021-06-05 14:46:25,001 INFO L226 Difference]: Without dead ends: 1997 [2021-06-05 14:46:25,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 510.1ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:46:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-06-05 14:46:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1662. [2021-06-05 14:46:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4942805538832027) internal successors, (5804), 1661 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5804 transitions. [2021-06-05 14:46:25,019 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5804 transitions. Word has length 24 [2021-06-05 14:46:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:25,019 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5804 transitions. [2021-06-05 14:46:25,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5804 transitions. [2021-06-05 14:46:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:25,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:25,021 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:25,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7000,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:25,222 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:25,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:25,222 INFO L82 PathProgramCache]: Analyzing trace with hash -395223410, now seen corresponding path program 324 times [2021-06-05 14:46:25,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:25,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683107027] [2021-06-05 14:46:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:25,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:25,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683107027] [2021-06-05 14:46:25,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683107027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:25,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523111889] [2021-06-05 14:46:25,312 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:25,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:46:25,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:25,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:25,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:25,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523111889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:25,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:25,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:46:25,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721051793] [2021-06-05 14:46:25,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:46:25,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:46:25,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:46:25,554 INFO L87 Difference]: Start difference. First operand 1662 states and 5804 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:26,229 INFO L93 Difference]: Finished difference Result 2132 states and 7230 transitions. [2021-06-05 14:46:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:46:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:26,232 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 14:46:26,232 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 14:46:26,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:46:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 14:46:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1695. [2021-06-05 14:46:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.52125147579693) internal successors, (5965), 1694 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5965 transitions. [2021-06-05 14:46:26,250 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5965 transitions. Word has length 24 [2021-06-05 14:46:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:26,250 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5965 transitions. [2021-06-05 14:46:26,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5965 transitions. [2021-06-05 14:46:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:26,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:26,252 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7007 [2021-06-05 14:46:26,452 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1218343324, now seen corresponding path program 325 times [2021-06-05 14:46:26,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:26,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997032702] [2021-06-05 14:46:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:26,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:26,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997032702] [2021-06-05 14:46:26,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997032702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:26,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705154521] [2021-06-05 14:46:26,538 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:26,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705154521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:26,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:26,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:46:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674552819] [2021-06-05 14:46:26,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:46:26,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:26,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:46:26,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:46:26,764 INFO L87 Difference]: Start difference. First operand 1695 states and 5965 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:27,433 INFO L93 Difference]: Finished difference Result 1988 states and 6783 transitions. [2021-06-05 14:46:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:46:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:27,436 INFO L225 Difference]: With dead ends: 1988 [2021-06-05 14:46:27,436 INFO L226 Difference]: Without dead ends: 1919 [2021-06-05 14:46:27,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:46:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-06-05 14:46:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1622. [2021-06-05 14:46:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.4818013571869217) internal successors, (5644), 1621 states have internal predecessors, (5644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5644 transitions. [2021-06-05 14:46:27,453 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5644 transitions. Word has length 24 [2021-06-05 14:46:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:27,453 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5644 transitions. [2021-06-05 14:46:27,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5644 transitions. [2021-06-05 14:46:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:27,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:27,455 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:27,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7016 [2021-06-05 14:46:27,655 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1500604018, now seen corresponding path program 326 times [2021-06-05 14:46:27,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:27,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995413415] [2021-06-05 14:46:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:27,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:27,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:27,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995413415] [2021-06-05 14:46:27,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995413415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:27,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084087976] [2021-06-05 14:46:27,740 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:27,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:27,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:27,892 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 4 treesize of output 2 [2021-06-05 14:46:27,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:27,912 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 14:46:27,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:27,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-05 14:46:27,966 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 4 treesize of output 2 [2021-06-05 14:46:27,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:27,969 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 4 treesize of output 2 [2021-06-05 14:46:27,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:27,972 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 4 treesize of output 2 [2021-06-05 14:46:27,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,009 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:46:28,010 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 3 treesize of output 1 [2021-06-05 14:46:28,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,013 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 4 treesize of output 2 [2021-06-05 14:46:28,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:28,040 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:46:28,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:28,041 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:46:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:28,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084087976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:28,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:28,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:46:28,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146830013] [2021-06-05 14:46:28,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:46:28,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:46:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:46:28,085 INFO L87 Difference]: Start difference. First operand 1622 states and 5644 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:28,767 INFO L93 Difference]: Finished difference Result 1893 states and 6482 transitions. [2021-06-05 14:46:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 24 [2021-06-05 14:46:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:28,770 INFO L225 Difference]: With dead ends: 1893 [2021-06-05 14:46:28,770 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 14:46:28,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:46:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 14:46:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1651. [2021-06-05 14:46:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4903030303030302) internal successors, (5759), 1650 states have internal predecessors, (5759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5759 transitions. [2021-06-05 14:46:28,787 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5759 transitions. Word has length 24 [2021-06-05 14:46:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:28,787 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5759 transitions. [2021-06-05 14:46:28,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5759 transitions. [2021-06-05 14:46:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:28,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:28,789 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:28,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7025,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:28,990 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:28,990 INFO L82 PathProgramCache]: Analyzing trace with hash -325113374, now seen corresponding path program 327 times [2021-06-05 14:46:28,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:28,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59888756] [2021-06-05 14:46:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:29,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59888756] [2021-06-05 14:46:29,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59888756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:29,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849451734] [2021-06-05 14:46:29,083 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:29,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:46:29,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:29,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:29,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:29,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:29,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,258 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 14:46:29,260 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 4 treesize of output 2 [2021-06-05 14:46:29,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:29,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:29,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:46:29,443 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 4 treesize of output 2 [2021-06-05 14:46:29,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,447 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 4 treesize of output 2 [2021-06-05 14:46:29,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:29,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,453 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:29,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:29,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,459 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 3 treesize of output 1 [2021-06-05 14:46:29,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,462 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 3 treesize of output 1 [2021-06-05 14:46:29,463 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:29,466 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,534 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.8 percent of original size [2021-06-05 14:46:29,537 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 3 treesize of output 1 [2021-06-05 14:46:29,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,540 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 4 treesize of output 2 [2021-06-05 14:46:29,541 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,543 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 4 treesize of output 2 [2021-06-05 14:46:29,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:29,598 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-05 14:46:29,599 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-06-05 14:46:29,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:29,600 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-05 14:46:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:29,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849451734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:29,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:29,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:46:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976636944] [2021-06-05 14:46:29,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:46:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:46:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:46:29,673 INFO L87 Difference]: Start difference. First operand 1651 states and 5759 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:30,388 INFO L93 Difference]: Finished difference Result 2065 states and 7023 transitions. [2021-06-05 14:46:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:46:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:30,391 INFO L225 Difference]: With dead ends: 2065 [2021-06-05 14:46:30,391 INFO L226 Difference]: Without dead ends: 2005 [2021-06-05 14:46:30,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:46:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-06-05 14:46:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1683. [2021-06-05 14:46:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.5172413793103448) internal successors, (5916), 1682 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5916 transitions. [2021-06-05 14:46:30,409 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5916 transitions. Word has length 24 [2021-06-05 14:46:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:30,409 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5916 transitions. [2021-06-05 14:46:30,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5916 transitions. [2021-06-05 14:46:30,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:30,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:30,411 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:30,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7032 [2021-06-05 14:46:30,612 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:30,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1288453360, now seen corresponding path program 328 times [2021-06-05 14:46:30,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:30,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263834764] [2021-06-05 14:46:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:30,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:30,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263834764] [2021-06-05 14:46:30,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263834764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:30,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676982373] [2021-06-05 14:46:30,697 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:30,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:30,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:30,850 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 4 treesize of output 2 [2021-06-05 14:46:30,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:30,872 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-05 14:46:30,872 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-06-05 14:46:30,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:30,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:46:30,985 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 3 treesize of output 1 [2021-06-05 14:46:30,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,100 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-05 14:46:31,100 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.7 percent of original size [2021-06-05 14:46:31,103 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 3 treesize of output 1 [2021-06-05 14:46:31,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,106 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 4 treesize of output 2 [2021-06-05 14:46:31,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,110 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 4 treesize of output 2 [2021-06-05 14:46:31,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,113 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 3 treesize of output 1 [2021-06-05 14:46:31,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:31,149 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 4 treesize of output 2 [2021-06-05 14:46:31,150 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,208 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-05 14:46:31,210 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 4 treesize of output 2 [2021-06-05 14:46:31,211 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,252 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-05 14:46:31,255 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 3 treesize of output 1 [2021-06-05 14:46:31,255 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:31,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:31,274 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-06-05 14:46:31,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:31,275 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:192, output treesize:34 [2021-06-05 14:46:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:31,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676982373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:31,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:31,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:46:31,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680206023] [2021-06-05 14:46:31,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:46:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:46:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:46:31,347 INFO L87 Difference]: Start difference. First operand 1683 states and 5916 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:32,121 INFO L93 Difference]: Finished difference Result 1987 states and 6778 transitions. [2021-06-05 14:46:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:46:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:46:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:32,124 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 14:46:32,124 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 14:46:32,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 511.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:46:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 14:46:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1620. [2021-06-05 14:46:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4793082149474985) internal successors, (5633), 1619 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5633 transitions. [2021-06-05 14:46:32,141 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5633 transitions. Word has length 24 [2021-06-05 14:46:32,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:32,141 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5633 transitions. [2021-06-05 14:46:32,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5633 transitions. [2021-06-05 14:46:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:32,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:32,143 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:32,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-06-05 14:46:32,344 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:32,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1849886158, now seen corresponding path program 329 times [2021-06-05 14:46:32,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:32,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201947322] [2021-06-05 14:46:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:32,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:32,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201947322] [2021-06-05 14:46:32,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201947322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:32,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412417204] [2021-06-05 14:46:32,425 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:32,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:46:32,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:32,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:32,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:32,589 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 4 treesize of output 2 [2021-06-05 14:46:32,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:32,646 INFO L628 ElimStorePlain]: treesize reduction 48, result has 57.5 percent of original size [2021-06-05 14:46:32,648 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 4 treesize of output 2 [2021-06-05 14:46:32,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:32,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:32,676 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 3 treesize of output 1 [2021-06-05 14:46:32,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:32,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:32,700 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-05 14:46:32,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:32,701 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-05 14:46:32,788 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 3 treesize of output 1 [2021-06-05 14:46:32,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:32,791 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 4 treesize of output 2 [2021-06-05 14:46:32,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:32,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:32,809 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 4 treesize of output 2 [2021-06-05 14:46:32,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:32,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:32,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:32,825 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 14:46:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412417204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:32,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:32,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 14:46:32,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53589981] [2021-06-05 14:46:32,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:46:32,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:32,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:46:32,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:46:32,860 INFO L87 Difference]: Start difference. First operand 1620 states and 5633 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:33,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:33,750 INFO L93 Difference]: Finished difference Result 1842 states and 6264 transitions. [2021-06-05 14:46:33,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:46:33,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 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 24 [2021-06-05 14:46:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:33,753 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 14:46:33,753 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 14:46:33,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:46:33,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 14:46:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1620. [2021-06-05 14:46:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.465101914762199) internal successors, (5610), 1619 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5610 transitions. [2021-06-05 14:46:33,770 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5610 transitions. Word has length 24 [2021-06-05 14:46:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:33,770 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5610 transitions. [2021-06-05 14:46:33,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5610 transitions. [2021-06-05 14:46:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:33,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:33,772 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:33,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7128,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:33,972 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash 672807098, now seen corresponding path program 330 times [2021-06-05 14:46:33,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:33,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179354074] [2021-06-05 14:46:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:34,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:34,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179354074] [2021-06-05 14:46:34,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179354074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:34,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133673450] [2021-06-05 14:46:34,061 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:34,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:46:34,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:34,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:34,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:34,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:34,234 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-05 14:46:34,236 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 4 treesize of output 2 [2021-06-05 14:46:34,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:34,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:34,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:34,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 14:46:34,293 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 4 treesize of output 2 [2021-06-05 14:46:34,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:34,296 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 4 treesize of output 2 [2021-06-05 14:46:34,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:34,299 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 4 treesize of output 2 [2021-06-05 14:46:34,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:34,337 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 14:46:34,339 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 4 treesize of output 2 [2021-06-05 14:46:34,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:34,342 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 3 treesize of output 1 [2021-06-05 14:46:34,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:34,369 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-05 14:46:34,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:34,370 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-05 14:46:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:34,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133673450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:34,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:34,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:46:34,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760993425] [2021-06-05 14:46:34,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:46:34,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:46:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:46:34,416 INFO L87 Difference]: Start difference. First operand 1620 states and 5610 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:35,045 INFO L93 Difference]: Finished difference Result 1843 states and 6268 transitions. [2021-06-05 14:46:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 24 [2021-06-05 14:46:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:35,048 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 14:46:35,048 INFO L226 Difference]: Without dead ends: 1774 [2021-06-05 14:46:35,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:46:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-06-05 14:46:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1601. [2021-06-05 14:46:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.465625) internal successors, (5545), 1600 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5545 transitions. [2021-06-05 14:46:35,066 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5545 transitions. Word has length 24 [2021-06-05 14:46:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:35,066 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5545 transitions. [2021-06-05 14:46:35,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5545 transitions. [2021-06-05 14:46:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:35,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:35,068 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:35,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7140,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:35,268 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:35,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:35,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1848297742, now seen corresponding path program 331 times [2021-06-05 14:46:35,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:35,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343855422] [2021-06-05 14:46:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:35,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:35,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343855422] [2021-06-05 14:46:35,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343855422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:35,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685994080] [2021-06-05 14:46:35,446 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:35,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685994080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:35,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:35,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:46:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666327968] [2021-06-05 14:46:35,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:46:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:46:35,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:46:35,727 INFO L87 Difference]: Start difference. First operand 1601 states and 5545 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:37,919 INFO L93 Difference]: Finished difference Result 2411 states and 7945 transitions. [2021-06-05 14:46:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 14:46:37,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:37,923 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 14:46:37,923 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 14:46:37,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1752.4ms TimeCoverageRelationStatistics Valid=543, Invalid=4149, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 14:46:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 14:46:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1593. [2021-06-05 14:46:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4673366834170856) internal successors, (5520), 1592 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5520 transitions. [2021-06-05 14:46:37,944 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5520 transitions. Word has length 24 [2021-06-05 14:46:37,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:37,944 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5520 transitions. [2021-06-05 14:46:37,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:37,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5520 transitions. [2021-06-05 14:46:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:37,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:37,946 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:38,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7147 [2021-06-05 14:46:38,146 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash -366197958, now seen corresponding path program 332 times [2021-06-05 14:46:38,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:38,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771862263] [2021-06-05 14:46:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:38,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:38,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771862263] [2021-06-05 14:46:38,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771862263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:38,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161211347] [2021-06-05 14:46:38,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:38,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:38,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161211347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:38,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:38,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:46:38,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451741439] [2021-06-05 14:46:38,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:46:38,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:38,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:46:38,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:46:38,580 INFO L87 Difference]: Start difference. First operand 1593 states and 5520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:41,000 INFO L93 Difference]: Finished difference Result 2287 states and 7567 transitions. [2021-06-05 14:46:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 14:46:41,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:41,004 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 14:46:41,004 INFO L226 Difference]: Without dead ends: 2127 [2021-06-05 14:46:41,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1931.0ms TimeCoverageRelationStatistics Valid=596, Invalid=4806, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 14:46:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-06-05 14:46:41,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1582. [2021-06-05 14:46:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.476913345983555) internal successors, (5497), 1581 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5497 transitions. [2021-06-05 14:46:41,023 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5497 transitions. Word has length 24 [2021-06-05 14:46:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:41,024 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5497 transitions. [2021-06-05 14:46:41,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5497 transitions. [2021-06-05 14:46:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:41,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:41,025 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:41,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7154,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:41,226 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:41,226 INFO L82 PathProgramCache]: Analyzing trace with hash -296087922, now seen corresponding path program 333 times [2021-06-05 14:46:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:41,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854138723] [2021-06-05 14:46:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:41,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:41,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854138723] [2021-06-05 14:46:41,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854138723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:41,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043212088] [2021-06-05 14:46:41,326 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:41,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:46:41,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:41,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:41,506 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 5 treesize of output 1 [2021-06-05 14:46:41,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,580 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-05 14:46:41,582 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 6 treesize of output 2 [2021-06-05 14:46:41,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:41,620 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 5 treesize of output 1 [2021-06-05 14:46:41,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,623 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 6 treesize of output 2 [2021-06-05 14:46:41,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,672 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 14:46:41,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:41,673 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:111, output treesize:62 [2021-06-05 14:46:41,780 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 3 treesize of output 1 [2021-06-05 14:46:41,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,783 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 4 treesize of output 2 [2021-06-05 14:46:41,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,786 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 4 treesize of output 2 [2021-06-05 14:46:41,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,789 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 4 treesize of output 2 [2021-06-05 14:46:41,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,873 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:46:41,875 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 4 treesize of output 2 [2021-06-05 14:46:41,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,878 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 4 treesize of output 2 [2021-06-05 14:46:41,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:41,930 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:46:41,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:46:41,931 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:46:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:42,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043212088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:42,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:42,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:46:42,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063357364] [2021-06-05 14:46:42,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:46:42,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:42,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:46:42,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:46:42,012 INFO L87 Difference]: Start difference. First operand 1582 states and 5497 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:42,798 INFO L93 Difference]: Finished difference Result 1916 states and 6490 transitions. [2021-06-05 14:46:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:46:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:42,801 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 14:46:42,801 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 14:46:42,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 625.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:46:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 14:46:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1606. [2021-06-05 14:46:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.485981308411215) internal successors, (5595), 1605 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5595 transitions. [2021-06-05 14:46:42,818 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5595 transitions. Word has length 24 [2021-06-05 14:46:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:42,818 INFO L482 AbstractCegarLoop]: Abstraction has 1606 states and 5595 transitions. [2021-06-05 14:46:42,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5595 transitions. [2021-06-05 14:46:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:42,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:42,820 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:43,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7164 [2021-06-05 14:46:43,021 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1317478812, now seen corresponding path program 334 times [2021-06-05 14:46:43,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:43,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876574964] [2021-06-05 14:46:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:43,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:43,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876574964] [2021-06-05 14:46:43,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876574964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:43,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20213149] [2021-06-05 14:46:43,126 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:43,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:46:43,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:43,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:43,297 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 6 treesize of output 2 [2021-06-05 14:46:43,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,300 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 5 treesize of output 1 [2021-06-05 14:46:43,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:43,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,372 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 14:46:43,374 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 6 treesize of output 2 [2021-06-05 14:46:43,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,424 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.0 percent of original size [2021-06-05 14:46:43,424 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 14:46:43,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:43,425 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:142, output treesize:67 [2021-06-05 14:46:43,528 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 4 treesize of output 2 [2021-06-05 14:46:43,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,531 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 4 treesize of output 2 [2021-06-05 14:46:43,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,535 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 3 treesize of output 1 [2021-06-05 14:46:43,536 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:46:43,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,540 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 4 treesize of output 2 [2021-06-05 14:46:43,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,599 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-05 14:46:43,602 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 4 treesize of output 2 [2021-06-05 14:46:43,603 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,605 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 4 treesize of output 2 [2021-06-05 14:46:43,606 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:43,645 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 14:46:43,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:43,646 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-05 14:46:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:43,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20213149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:43,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:43,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:46:43,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704275467] [2021-06-05 14:46:43,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:46:43,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:43,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:46:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:46:43,720 INFO L87 Difference]: Start difference. First operand 1606 states and 5595 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:44,902 INFO L93 Difference]: Finished difference Result 1985 states and 6653 transitions. [2021-06-05 14:46:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:46:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:44,905 INFO L225 Difference]: With dead ends: 1985 [2021-06-05 14:46:44,905 INFO L226 Difference]: Without dead ends: 1906 [2021-06-05 14:46:44,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 889.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:46:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-06-05 14:46:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1545. [2021-06-05 14:46:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.461139896373057) internal successors, (5344), 1544 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5344 transitions. [2021-06-05 14:46:44,921 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5344 transitions. Word has length 24 [2021-06-05 14:46:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:44,921 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5344 transitions. [2021-06-05 14:46:44,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5344 transitions. [2021-06-05 14:46:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:44,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:44,923 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:45,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7180,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:45,124 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash -201559986, now seen corresponding path program 335 times [2021-06-05 14:46:45,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:45,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641360862] [2021-06-05 14:46:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:45,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:45,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641360862] [2021-06-05 14:46:45,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641360862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:45,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751455244] [2021-06-05 14:46:45,218 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:45,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:45,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:45,394 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 5 treesize of output 1 [2021-06-05 14:46:45,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:45,489 INFO L628 ElimStorePlain]: treesize reduction 31, result has 81.3 percent of original size [2021-06-05 14:46:45,492 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 5 treesize of output 1 [2021-06-05 14:46:45,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:45,582 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.4 percent of original size [2021-06-05 14:46:45,585 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 6 treesize of output 2 [2021-06-05 14:46:45,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:45,588 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 6 treesize of output 2 [2021-06-05 14:46:45,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:45,640 INFO L628 ElimStorePlain]: treesize reduction 50, result has 55.4 percent of original size [2021-06-05 14:46:45,640 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 14:46:45,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:45,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:171, output treesize:62 [2021-06-05 14:46:45,770 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 4 treesize of output 2 [2021-06-05 14:46:45,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:45,773 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 3 treesize of output 1 [2021-06-05 14:46:45,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:45,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:45,790 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 4 treesize of output 2 [2021-06-05 14:46:45,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:45,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:45,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:45,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 14:46:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:45,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751455244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:45,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:45,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:46:45,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987943178] [2021-06-05 14:46:45,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:46:45,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:45,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:46:45,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:46:45,841 INFO L87 Difference]: Start difference. First operand 1545 states and 5344 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:46,788 INFO L93 Difference]: Finished difference Result 1877 states and 6305 transitions. [2021-06-05 14:46:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:46:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:46,791 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 14:46:46,791 INFO L226 Difference]: Without dead ends: 1800 [2021-06-05 14:46:46,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 759.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:46:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-06-05 14:46:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1534. [2021-06-05 14:46:46,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.4494455316373123) internal successors, (5288), 1533 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5288 transitions. [2021-06-05 14:46:46,808 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5288 transitions. Word has length 24 [2021-06-05 14:46:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:46,808 INFO L482 AbstractCegarLoop]: Abstraction has 1534 states and 5288 transitions. [2021-06-05 14:46:46,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5288 transitions. [2021-06-05 14:46:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:46,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:46,810 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:47,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7197 [2021-06-05 14:46:47,010 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:47,010 INFO L82 PathProgramCache]: Analyzing trace with hash -47122468, now seen corresponding path program 336 times [2021-06-05 14:46:47,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:47,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331690980] [2021-06-05 14:46:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:47,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:47,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331690980] [2021-06-05 14:46:47,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331690980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:47,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846423557] [2021-06-05 14:46:47,099 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:47,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:46:47,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:47,268 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 5 treesize of output 1 [2021-06-05 14:46:47,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:47,344 INFO L628 ElimStorePlain]: treesize reduction 32, result has 75.8 percent of original size [2021-06-05 14:46:47,346 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 6 treesize of output 2 [2021-06-05 14:46:47,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:47,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:47,383 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 6 treesize of output 2 [2021-06-05 14:46:47,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:47,434 INFO L628 ElimStorePlain]: treesize reduction 21, result has 76.1 percent of original size [2021-06-05 14:46:47,436 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 5 treesize of output 1 [2021-06-05 14:46:47,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:47,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:47,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:47,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-05 14:46:47,573 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 4 treesize of output 2 [2021-06-05 14:46:47,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:47,576 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 3 treesize of output 1 [2021-06-05 14:46:47,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:47,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:47,593 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 4 treesize of output 2 [2021-06-05 14:46:47,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:47,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:47,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:46:47,609 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 14:46:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:46:47,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846423557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:47,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:47,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:46:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146873306] [2021-06-05 14:46:47,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:46:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:46:47,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:46:47,644 INFO L87 Difference]: Start difference. First operand 1534 states and 5288 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:48,425 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-06-05 14:46:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:48,652 INFO L93 Difference]: Finished difference Result 1768 states and 5949 transitions. [2021-06-05 14:46:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:46:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:48,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:48,655 INFO L225 Difference]: With dead ends: 1768 [2021-06-05 14:46:48,655 INFO L226 Difference]: Without dead ends: 1677 [2021-06-05 14:46:48,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 729.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:46:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-06-05 14:46:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1513. [2021-06-05 14:46:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.447089947089947) internal successors, (5212), 1512 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5212 transitions. [2021-06-05 14:46:48,670 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5212 transitions. Word has length 24 [2021-06-05 14:46:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:48,671 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 5212 transitions. [2021-06-05 14:46:48,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5212 transitions. [2021-06-05 14:46:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:48,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:48,672 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:48,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7211 [2021-06-05 14:46:48,873 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash -841957494, now seen corresponding path program 337 times [2021-06-05 14:46:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:48,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827493880] [2021-06-05 14:46:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:49,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:49,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827493880] [2021-06-05 14:46:49,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827493880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:49,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459962905] [2021-06-05 14:46:49,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:49,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:46:49,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459962905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:49,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:49,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:46:49,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514788261] [2021-06-05 14:46:49,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:46:49,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:49,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:46:49,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:46:49,324 INFO L87 Difference]: Start difference. First operand 1513 states and 5212 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:51,864 INFO L93 Difference]: Finished difference Result 2288 states and 7400 transitions. [2021-06-05 14:46:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 14:46:51,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:51,868 INFO L225 Difference]: With dead ends: 2288 [2021-06-05 14:46:51,868 INFO L226 Difference]: Without dead ends: 2168 [2021-06-05 14:46:51,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1920.0ms TimeCoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 14:46:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-06-05 14:46:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1520. [2021-06-05 14:46:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.4476629361421987) internal successors, (5237), 1519 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5237 transitions. [2021-06-05 14:46:51,886 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5237 transitions. Word has length 24 [2021-06-05 14:46:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:51,886 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5237 transitions. [2021-06-05 14:46:51,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5237 transitions. [2021-06-05 14:46:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:51,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:51,888 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:52,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7224 [2021-06-05 14:46:52,089 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash 771609240, now seen corresponding path program 338 times [2021-06-05 14:46:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:52,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605419183] [2021-06-05 14:46:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:52,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:52,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605419183] [2021-06-05 14:46:52,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605419183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:52,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629595769] [2021-06-05 14:46:52,289 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:52,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:46:52,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:52,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:52,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:46:52,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629595769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:52,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:52,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 14:46:52,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886492923] [2021-06-05 14:46:52,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:46:52,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:52,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:46:52,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:46:52,653 INFO L87 Difference]: Start difference. First operand 1520 states and 5237 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:54,440 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 14:46:55,312 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 14:46:55,732 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-05 14:46:56,096 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-06-05 14:46:56,355 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 14:46:57,007 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 14:46:57,372 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 14:46:57,514 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 14:46:58,046 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-05 14:46:58,232 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 14:46:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:46:58,560 INFO L93 Difference]: Finished difference Result 3187 states and 9796 transitions. [2021-06-05 14:46:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 14:46:58,560 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:46:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:46:58,564 INFO L225 Difference]: With dead ends: 3187 [2021-06-05 14:46:58,564 INFO L226 Difference]: Without dead ends: 2927 [2021-06-05 14:46:58,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 5132.1ms TimeCoverageRelationStatistics Valid=1010, Invalid=7180, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 14:46:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-05 14:46:58,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1494. [2021-06-05 14:46:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.4166108506363027) internal successors, (5101), 1493 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5101 transitions. [2021-06-05 14:46:58,586 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5101 transitions. Word has length 24 [2021-06-05 14:46:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:46:58,586 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5101 transitions. [2021-06-05 14:46:58,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:46:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5101 transitions. [2021-06-05 14:46:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:46:58,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:46:58,587 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:46:58,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7232 [2021-06-05 14:46:58,788 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:46:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:46:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1854467236, now seen corresponding path program 339 times [2021-06-05 14:46:58,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:46:58,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549732289] [2021-06-05 14:46:58,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:46:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:46:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:46:58,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:46:58,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549732289] [2021-06-05 14:46:58,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549732289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:58,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394146234] [2021-06-05 14:46:58,890 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:46:59,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:46:59,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:46:59,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:46:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:46:59,076 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 4 treesize of output 2 [2021-06-05 14:46:59,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,164 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-05 14:46:59,166 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 3 treesize of output 1 [2021-06-05 14:46:59,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,235 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.8 percent of original size [2021-06-05 14:46:59,237 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 3 treesize of output 1 [2021-06-05 14:46:59,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:59,271 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 4 treesize of output 2 [2021-06-05 14:46:59,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,319 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 14:46:59,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-05 14:46:59,321 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:61 [2021-06-05 14:46:59,528 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 3 treesize of output 1 [2021-06-05 14:46:59,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:46:59,532 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 8 treesize of output 1 [2021-06-05 14:46:59,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,559 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.8 percent of original size [2021-06-05 14:46:59,561 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 4 treesize of output 2 [2021-06-05 14:46:59,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:46:59,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:46:59,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:46:59,572 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:11 [2021-06-05 14:46:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:46:59,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394146234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:46:59,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:46:59,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 14:46:59,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534538230] [2021-06-05 14:46:59,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:46:59,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:46:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:46:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:46:59,613 INFO L87 Difference]: Start difference. First operand 1494 states and 5101 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:01,041 INFO L93 Difference]: Finished difference Result 1883 states and 6189 transitions. [2021-06-05 14:47:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:47:01,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:01,044 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 14:47:01,044 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 14:47:01,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1050.5ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:47:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 14:47:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1474. [2021-06-05 14:47:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.415478615071283) internal successors, (5031), 1473 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) [2021-06-05 14:47:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5031 transitions. [2021-06-05 14:47:01,060 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5031 transitions. Word has length 24 [2021-06-05 14:47:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:01,060 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5031 transitions. [2021-06-05 14:47:01,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5031 transitions. [2021-06-05 14:47:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:01,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:01,062 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:01,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7240 [2021-06-05 14:47:01,262 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:01,263 INFO L82 PathProgramCache]: Analyzing trace with hash 27651606, now seen corresponding path program 340 times [2021-06-05 14:47:01,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:01,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622023181] [2021-06-05 14:47:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:01,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:01,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622023181] [2021-06-05 14:47:01,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622023181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:01,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893700157] [2021-06-05 14:47:01,356 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:01,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:01,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:01,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:01,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:01,518 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 5 treesize of output 1 [2021-06-05 14:47:01,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,596 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 14:47:01,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-05 14:47:01,599 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 6 treesize of output 2 [2021-06-05 14:47:01,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,602 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 5 treesize of output 1 [2021-06-05 14:47:01,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:01,637 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 6 treesize of output 2 [2021-06-05 14:47:01,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,685 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 14:47:01,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:01,686 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 14:47:01,799 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 4 treesize of output 2 [2021-06-05 14:47:01,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,802 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 4 treesize of output 2 [2021-06-05 14:47:01,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,806 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 4 treesize of output 2 [2021-06-05 14:47:01,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,809 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 3 treesize of output 1 [2021-06-05 14:47:01,810 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,878 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:47:01,881 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 4 treesize of output 2 [2021-06-05 14:47:01,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,884 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 4 treesize of output 2 [2021-06-05 14:47:01,885 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:01,935 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:47:01,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:01,936 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:47:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:02,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893700157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:02,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:02,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:47:02,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246642432] [2021-06-05 14:47:02,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:02,017 INFO L87 Difference]: Start difference. First operand 1474 states and 5031 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:03,184 INFO L93 Difference]: Finished difference Result 1848 states and 6050 transitions. [2021-06-05 14:47:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:47:03,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:03,186 INFO L225 Difference]: With dead ends: 1848 [2021-06-05 14:47:03,186 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 14:47:03,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 869.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:47:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 14:47:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1442. [2021-06-05 14:47:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3795975017349065) internal successors, (4870), 1441 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4870 transitions. [2021-06-05 14:47:03,201 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4870 transitions. Word has length 24 [2021-06-05 14:47:03,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:03,201 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4870 transitions. [2021-06-05 14:47:03,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4870 transitions. [2021-06-05 14:47:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:03,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:03,203 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:03,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7276,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:03,403 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash 520247368, now seen corresponding path program 341 times [2021-06-05 14:47:03,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:03,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689083704] [2021-06-05 14:47:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:03,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:03,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689083704] [2021-06-05 14:47:03,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689083704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:03,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791328283] [2021-06-05 14:47:03,496 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:03,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:47:03,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:03,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:03,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:03,668 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 5 treesize of output 1 [2021-06-05 14:47:03,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,745 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-05 14:47:03,747 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 6 treesize of output 2 [2021-06-05 14:47:03,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,803 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-05 14:47:03,803 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-05 14:47:03,806 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 6 treesize of output 2 [2021-06-05 14:47:03,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,808 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 5 treesize of output 1 [2021-06-05 14:47:03,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:03,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:03,834 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-05 14:47:03,957 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 4 treesize of output 2 [2021-06-05 14:47:03,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,960 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 3 treesize of output 1 [2021-06-05 14:47:03,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:03,977 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 4 treesize of output 2 [2021-06-05 14:47:03,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:03,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:03,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:03,993 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-05 14:47:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:04,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791328283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:04,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:04,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 14:47:04,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741792249] [2021-06-05 14:47:04,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:04,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:04,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:04,031 INFO L87 Difference]: Start difference. First operand 1442 states and 4870 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:05,084 INFO L93 Difference]: Finished difference Result 1760 states and 5793 transitions. [2021-06-05 14:47:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:47:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:05,087 INFO L225 Difference]: With dead ends: 1760 [2021-06-05 14:47:05,087 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 14:47:05,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:47:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 14:47:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1376. [2021-06-05 14:47:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.3767272727272726) internal successors, (4643), 1375 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4643 transitions. [2021-06-05 14:47:05,101 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4643 transitions. Word has length 24 [2021-06-05 14:47:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:05,101 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4643 transitions. [2021-06-05 14:47:05,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4643 transitions. [2021-06-05 14:47:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:05,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:05,103 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:05,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7291 [2021-06-05 14:47:05,303 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:05,303 INFO L82 PathProgramCache]: Analyzing trace with hash 326699018, now seen corresponding path program 342 times [2021-06-05 14:47:05,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:05,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875620611] [2021-06-05 14:47:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:05,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:05,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875620611] [2021-06-05 14:47:05,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875620611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:05,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99973413] [2021-06-05 14:47:05,394 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:05,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:47:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:05,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:05,584 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 4 treesize of output 2 [2021-06-05 14:47:05,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,642 INFO L628 ElimStorePlain]: treesize reduction 53, result has 55.1 percent of original size [2021-06-05 14:47:05,644 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 4 treesize of output 2 [2021-06-05 14:47:05,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,647 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 3 treesize of output 1 [2021-06-05 14:47:05,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:05,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-05 14:47:05,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:05,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:58 [2021-06-05 14:47:05,747 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 4 treesize of output 2 [2021-06-05 14:47:05,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,750 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 4 treesize of output 2 [2021-06-05 14:47:05,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,753 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 3 treesize of output 1 [2021-06-05 14:47:05,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,756 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 4 treesize of output 2 [2021-06-05 14:47:05,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,826 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-05 14:47:05,828 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 4 treesize of output 2 [2021-06-05 14:47:05,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,831 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 4 treesize of output 2 [2021-06-05 14:47:05,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:05,882 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-05 14:47:05,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:05,883 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-05 14:47:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:05,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99973413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:05,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:05,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:47:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103526678] [2021-06-05 14:47:05,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:47:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:05,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:47:05,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:47:05,954 INFO L87 Difference]: Start difference. First operand 1376 states and 4643 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:06,658 INFO L93 Difference]: Finished difference Result 1650 states and 5378 transitions. [2021-06-05 14:47:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:47:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 24 [2021-06-05 14:47:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:06,661 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 14:47:06,661 INFO L226 Difference]: Without dead ends: 1576 [2021-06-05 14:47:06,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:47:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-05 14:47:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1358. [2021-06-05 14:47:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3559322033898304) internal successors, (4554), 1357 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4554 transitions. [2021-06-05 14:47:06,676 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4554 transitions. Word has length 24 [2021-06-05 14:47:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:06,676 INFO L482 AbstractCegarLoop]: Abstraction has 1358 states and 4554 transitions. [2021-06-05 14:47:06,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4554 transitions. [2021-06-05 14:47:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:06,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:06,677 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:06,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7304,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:06,878 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:06,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:06,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1617240540, now seen corresponding path program 343 times [2021-06-05 14:47:06,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:06,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754076655] [2021-06-05 14:47:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:06,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:06,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754076655] [2021-06-05 14:47:06,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754076655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:06,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007830252] [2021-06-05 14:47:06,966 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:07,160 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 4 treesize of output 2 [2021-06-05 14:47:07,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,230 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 14:47:07,232 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 3 treesize of output 1 [2021-06-05 14:47:07,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:07,268 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 4 treesize of output 2 [2021-06-05 14:47:07,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,271 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 3 treesize of output 1 [2021-06-05 14:47:07,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,319 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-05 14:47:07,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:07,319 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:61 [2021-06-05 14:47:07,383 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 4 treesize of output 2 [2021-06-05 14:47:07,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,386 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 4 treesize of output 2 [2021-06-05 14:47:07,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,389 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 4 treesize of output 2 [2021-06-05 14:47:07,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,392 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 4 treesize of output 2 [2021-06-05 14:47:07,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,395 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 3 treesize of output 1 [2021-06-05 14:47:07,396 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,456 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-06-05 14:47:07,459 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 4 treesize of output 2 [2021-06-05 14:47:07,459 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,461 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 4 treesize of output 2 [2021-06-05 14:47:07,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:07,501 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 14:47:07,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:07,502 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-05 14:47:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:07,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007830252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:07,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:07,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 14:47:07,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233261535] [2021-06-05 14:47:07,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:47:07,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:07,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:47:07,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:47:07,565 INFO L87 Difference]: Start difference. First operand 1358 states and 4554 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:08,505 INFO L93 Difference]: Finished difference Result 1627 states and 5306 transitions. [2021-06-05 14:47:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:47:08,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:08,508 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 14:47:08,508 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 14:47:08,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:47:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 14:47:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1251. [2021-06-05 14:47:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-05 14:47:08,521 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-05 14:47:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:08,521 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-05 14:47:08,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-05 14:47:08,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:08,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:08,523 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:08,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7318 [2021-06-05 14:47:08,723 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:08,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1252048260, now seen corresponding path program 344 times [2021-06-05 14:47:08,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:08,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323106463] [2021-06-05 14:47:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:08,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:08,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323106463] [2021-06-05 14:47:08,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323106463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:08,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470715744] [2021-06-05 14:47:08,810 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:08,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:08,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:08,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:09,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470715744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:09,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:09,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:47:09,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68168460] [2021-06-05 14:47:09,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:09,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:09,107 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:09,298 INFO L93 Difference]: Finished difference Result 1572 states and 5105 transitions. [2021-06-05 14:47:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:47:09,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:09,300 INFO L225 Difference]: With dead ends: 1572 [2021-06-05 14:47:09,301 INFO L226 Difference]: Without dead ends: 1509 [2021-06-05 14:47:09,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:47:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-05 14:47:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1251. [2021-06-05 14:47:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-05 14:47:09,314 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-05 14:47:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:09,314 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-05 14:47:09,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-05 14:47:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:09,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:09,315 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:09,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7337,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:09,516 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:09,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1133518474, now seen corresponding path program 345 times [2021-06-05 14:47:09,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:09,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124015021] [2021-06-05 14:47:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:09,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:09,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124015021] [2021-06-05 14:47:09,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124015021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:09,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954138704] [2021-06-05 14:47:09,597 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:09,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:47:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:09,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954138704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:09,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:09,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:47:09,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123130354] [2021-06-05 14:47:09,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:09,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:09,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:09,887 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:10,040 INFO L93 Difference]: Finished difference Result 1425 states and 4662 transitions. [2021-06-05 14:47:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:47:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:10,042 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 14:47:10,043 INFO L226 Difference]: Without dead ends: 1342 [2021-06-05 14:47:10,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-05 14:47:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1198. [2021-06-05 14:47:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.343358395989975) internal successors, (4002), 1197 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4002 transitions. [2021-06-05 14:47:10,054 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4002 transitions. Word has length 24 [2021-06-05 14:47:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:10,054 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4002 transitions. [2021-06-05 14:47:10,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4002 transitions. [2021-06-05 14:47:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:10,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:10,056 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:10,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7348,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:10,256 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 581879458, now seen corresponding path program 346 times [2021-06-05 14:47:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:10,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132422402] [2021-06-05 14:47:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:10,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132422402] [2021-06-05 14:47:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132422402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992353620] [2021-06-05 14:47:10,344 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:10,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:10,504 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 4 treesize of output 2 [2021-06-05 14:47:10,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:10,519 INFO L628 ElimStorePlain]: treesize reduction 2, result has 87.5 percent of original size [2021-06-05 14:47:10,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:47:10,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2021-06-05 14:47:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:10,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992353620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:10,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:10,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:47:10,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338794379] [2021-06-05 14:47:10,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:47:10,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:47:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:47:10,640 INFO L87 Difference]: Start difference. First operand 1198 states and 4002 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:10,791 INFO L93 Difference]: Finished difference Result 1478 states and 4858 transitions. [2021-06-05 14:47:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:47:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:10,793 INFO L225 Difference]: With dead ends: 1478 [2021-06-05 14:47:10,793 INFO L226 Difference]: Without dead ends: 1415 [2021-06-05 14:47:10,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:47:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-05 14:47:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1173. [2021-06-05 14:47:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.319965870307167) internal successors, (3891), 1172 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3891 transitions. [2021-06-05 14:47:10,804 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3891 transitions. Word has length 24 [2021-06-05 14:47:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:10,804 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3891 transitions. [2021-06-05 14:47:10,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3891 transitions. [2021-06-05 14:47:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:10,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:10,806 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:11,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7360,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:11,006 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:11,006 INFO L82 PathProgramCache]: Analyzing trace with hash -761852682, now seen corresponding path program 347 times [2021-06-05 14:47:11,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:11,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709528422] [2021-06-05 14:47:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:11,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709528422] [2021-06-05 14:47:11,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709528422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:11,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138979625] [2021-06-05 14:47:11,095 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:11,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:47:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:11,284 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 4 treesize of output 2 [2021-06-05 14:47:11,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:11,359 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 14:47:11,362 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 4 treesize of output 2 [2021-06-05 14:47:11,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:11,406 INFO L628 ElimStorePlain]: treesize reduction 38, result has 59.1 percent of original size [2021-06-05 14:47:11,406 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-06-05 14:47:11,408 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 3 treesize of output 1 [2021-06-05 14:47:11,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:11,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:11,428 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-06-05 14:47:11,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:11,429 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:102, output treesize:52 [2021-06-05 14:47:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:11,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138979625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:11,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:11,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:47:11,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446234546] [2021-06-05 14:47:11,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:47:11,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:11,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:47:11,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:47:11,548 INFO L87 Difference]: Start difference. First operand 1173 states and 3891 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:11,739 INFO L93 Difference]: Finished difference Result 1470 states and 4693 transitions. [2021-06-05 14:47:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:47:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:11,741 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 14:47:11,741 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 14:47:11,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 14:47:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1130. [2021-06-05 14:47:11,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2719220549158545) internal successors, (3694), 1129 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3694 transitions. [2021-06-05 14:47:11,753 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3694 transitions. Word has length 24 [2021-06-05 14:47:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:11,753 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3694 transitions. [2021-06-05 14:47:11,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3694 transitions. [2021-06-05 14:47:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:11,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:11,754 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:11,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7383,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:11,955 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1623714052, now seen corresponding path program 348 times [2021-06-05 14:47:11,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:11,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080826157] [2021-06-05 14:47:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:12,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:12,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080826157] [2021-06-05 14:47:12,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080826157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:12,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318787673] [2021-06-05 14:47:12,046 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:12,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:47:12,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 14:47:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:12,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318787673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:12,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:12,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:47:12,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434994873] [2021-06-05 14:47:12,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:47:12,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:12,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:47:12,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:47:12,327 INFO L87 Difference]: Start difference. First operand 1130 states and 3694 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:12,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:12,518 INFO L93 Difference]: Finished difference Result 1323 states and 4250 transitions. [2021-06-05 14:47:12,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:47:12,519 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:12,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:12,520 INFO L225 Difference]: With dead ends: 1323 [2021-06-05 14:47:12,520 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 14:47:12,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:47:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 14:47:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1088. [2021-06-05 14:47:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.2594296228150874) internal successors, (3543), 1087 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3543 transitions. [2021-06-05 14:47:12,531 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3543 transitions. Word has length 24 [2021-06-05 14:47:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:12,531 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3543 transitions. [2021-06-05 14:47:12,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3543 transitions. [2021-06-05 14:47:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:12,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:12,532 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:12,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7400 [2021-06-05 14:47:12,732 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1130511476, now seen corresponding path program 349 times [2021-06-05 14:47:12,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:12,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58523348] [2021-06-05 14:47:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:12,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:12,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58523348] [2021-06-05 14:47:12,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58523348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:12,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768046994] [2021-06-05 14:47:12,806 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:13,259 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_310, ends_with_6], 1=[ends_with_10]} [2021-06-05 14:47:13,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:13,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,265 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 3 treesize of output 1 [2021-06-05 14:47:13,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,358 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-05 14:47:13,360 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 4 treesize of output 2 [2021-06-05 14:47:13,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,364 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 4 treesize of output 2 [2021-06-05 14:47:13,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,367 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 3 treesize of output 1 [2021-06-05 14:47:13,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,433 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 14:47:13,436 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 4 treesize of output 2 [2021-06-05 14:47:13,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,439 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 4 treesize of output 2 [2021-06-05 14:47:13,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,441 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 3 treesize of output 1 [2021-06-05 14:47:13,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:13,480 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 14:47:13,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:13,481 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-05 14:47:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:13,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768046994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:13,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:13,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:47:13,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107172502] [2021-06-05 14:47:13,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:47:13,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:13,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:47:13,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:47:13,533 INFO L87 Difference]: Start difference. First operand 1088 states and 3543 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:13,747 INFO L93 Difference]: Finished difference Result 1584 states and 5045 transitions. [2021-06-05 14:47:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:47:13,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 24 [2021-06-05 14:47:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:13,749 INFO L225 Difference]: With dead ends: 1584 [2021-06-05 14:47:13,749 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 14:47:13,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:13,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 14:47:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1136. [2021-06-05 14:47:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.289867841409692) internal successors, (3734), 1135 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3734 transitions. [2021-06-05 14:47:13,762 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3734 transitions. Word has length 24 [2021-06-05 14:47:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:13,762 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3734 transitions. [2021-06-05 14:47:13,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3734 transitions. [2021-06-05 14:47:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:13,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:13,763 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:13,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7412 [2021-06-05 14:47:13,963 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:13,964 INFO L82 PathProgramCache]: Analyzing trace with hash 54570504, now seen corresponding path program 350 times [2021-06-05 14:47:13,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:13,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580314870] [2021-06-05 14:47:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:14,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:14,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580314870] [2021-06-05 14:47:14,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580314870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:14,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47177429] [2021-06-05 14:47:14,042 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:14,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:14,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:14,506 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_311, ends_with_6], 1=[ends_with_10]} [2021-06-05 14:47:14,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:14,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,512 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 3 treesize of output 1 [2021-06-05 14:47:14,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,602 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-05 14:47:14,605 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 4 treesize of output 2 [2021-06-05 14:47:14,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,608 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 4 treesize of output 2 [2021-06-05 14:47:14,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,611 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 3 treesize of output 1 [2021-06-05 14:47:14,612 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,662 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-05 14:47:14,664 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 4 treesize of output 2 [2021-06-05 14:47:14,665 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,667 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 4 treesize of output 2 [2021-06-05 14:47:14,668 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,669 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 3 treesize of output 1 [2021-06-05 14:47:14,670 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:14,708 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 14:47:14,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:14,709 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-05 14:47:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:14,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47177429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:14,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:14,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:47:14,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737696310] [2021-06-05 14:47:14,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:14,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:14,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:14,779 INFO L87 Difference]: Start difference. First operand 1136 states and 3734 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:15,027 INFO L93 Difference]: Finished difference Result 1687 states and 5370 transitions. [2021-06-05 14:47:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:47:15,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:15,029 INFO L225 Difference]: With dead ends: 1687 [2021-06-05 14:47:15,029 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 14:47:15,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 14:47:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1134. [2021-06-05 14:47:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2983230361871136) internal successors, (3737), 1133 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3737 transitions. [2021-06-05 14:47:15,042 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3737 transitions. Word has length 24 [2021-06-05 14:47:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:15,043 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3737 transitions. [2021-06-05 14:47:15,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3737 transitions. [2021-06-05 14:47:15,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:15,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:15,044 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:15,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7506,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:15,244 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:15,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:15,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1814623444, now seen corresponding path program 351 times [2021-06-05 14:47:15,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:15,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150651193] [2021-06-05 14:47:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:15,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:15,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150651193] [2021-06-05 14:47:15,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150651193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:15,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177908188] [2021-06-05 14:47:15,316 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:15,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:47:15,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:15,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:15,651 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_313, v_prenex_312, ends_with_6], 1=[ends_with_10]} [2021-06-05 14:47:15,654 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 3 treesize of output 1 [2021-06-05 14:47:15,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,701 INFO L628 ElimStorePlain]: treesize reduction 94, result has 32.4 percent of original size [2021-06-05 14:47:15,701 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-05 14:47:15,703 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 4 treesize of output 2 [2021-06-05 14:47:15,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,736 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-06-05 14:47:15,738 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 4 treesize of output 2 [2021-06-05 14:47:15,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,740 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 4 treesize of output 2 [2021-06-05 14:47:15,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:15,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:15,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:47:15,755 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:142, output treesize:16 [2021-06-05 14:47:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:15,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177908188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:15,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:15,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:47:15,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527755398] [2021-06-05 14:47:15,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:15,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:15,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:15,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:15,797 INFO L87 Difference]: Start difference. First operand 1134 states and 3737 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:16,041 INFO L93 Difference]: Finished difference Result 1432 states and 4583 transitions. [2021-06-05 14:47:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:47:16,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:16,043 INFO L225 Difference]: With dead ends: 1432 [2021-06-05 14:47:16,043 INFO L226 Difference]: Without dead ends: 1380 [2021-06-05 14:47:16,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:47:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-05 14:47:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1094. [2021-06-05 14:47:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.262580054894785) internal successors, (3566), 1093 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3566 transitions. [2021-06-05 14:47:16,055 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3566 transitions. Word has length 24 [2021-06-05 14:47:16,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:16,055 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3566 transitions. [2021-06-05 14:47:16,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3566 transitions. [2021-06-05 14:47:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:16,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:16,056 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:16,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7601,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:16,257 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1658558706, now seen corresponding path program 352 times [2021-06-05 14:47:16,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:16,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282372424] [2021-06-05 14:47:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:47:16,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:16,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282372424] [2021-06-05 14:47:16,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282372424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:16,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94491975] [2021-06-05 14:47:16,352 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:16,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:16,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:16,566 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 4 treesize of output 2 [2021-06-05 14:47:16,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,570 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 4 treesize of output 2 [2021-06-05 14:47:16,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,573 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 4 treesize of output 2 [2021-06-05 14:47:16,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,576 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 3 treesize of output 1 [2021-06-05 14:47:16,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,638 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-05 14:47:16,638 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 14:47:16,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:47:16,640 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:59 [2021-06-05 14:47:16,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:16,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:16,732 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 8 treesize of output 1 [2021-06-05 14:47:16,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,735 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 3 treesize of output 1 [2021-06-05 14:47:16,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:16,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:16,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:47:16,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:11 [2021-06-05 14:47:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:16,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94491975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:16,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:16,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:47:16,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939019443] [2021-06-05 14:47:16,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:16,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:16,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:16,780 INFO L87 Difference]: Start difference. First operand 1094 states and 3566 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:18,181 INFO L93 Difference]: Finished difference Result 1761 states and 5439 transitions. [2021-06-05 14:47:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:47:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:18,183 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 14:47:18,183 INFO L226 Difference]: Without dead ends: 1531 [2021-06-05 14:47:18,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1108.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:47:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-06-05 14:47:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1136. [2021-06-05 14:47:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-05 14:47:18,197 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-05 14:47:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:18,197 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-05 14:47:18,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:18,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-05 14:47:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:18,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:18,198 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:18,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7627,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:18,399 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:18,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash -98423810, now seen corresponding path program 353 times [2021-06-05 14:47:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:18,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049976504] [2021-06-05 14:47:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:18,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:18,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049976504] [2021-06-05 14:47:18,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049976504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:18,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165358107] [2021-06-05 14:47:18,570 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:18,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:47:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:18,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:18,952 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_316], 1=[ends_with_10]} [2021-06-05 14:47:18,955 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 3 treesize of output 1 [2021-06-05 14:47:18,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:18,958 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 4 treesize of output 2 [2021-06-05 14:47:18,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:18,961 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 4 treesize of output 2 [2021-06-05 14:47:18,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:18,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:18,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,017 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.3 percent of original size [2021-06-05 14:47:19,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_316 vanished before elimination [2021-06-05 14:47:19,020 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 4 treesize of output 2 [2021-06-05 14:47:19,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,023 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 4 treesize of output 2 [2021-06-05 14:47:19,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:19,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:19,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:47:19,044 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:172, output treesize:16 [2021-06-05 14:47:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:19,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165358107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:19,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:19,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:47:19,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743383130] [2021-06-05 14:47:19,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:19,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:19,086 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:19,546 INFO L93 Difference]: Finished difference Result 1472 states and 4723 transitions. [2021-06-05 14:47:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:47:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:19,548 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 14:47:19,549 INFO L226 Difference]: Without dead ends: 1420 [2021-06-05 14:47:19,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:47:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-06-05 14:47:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1136. [2021-06-05 14:47:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-05 14:47:19,570 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-05 14:47:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:19,570 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-05 14:47:19,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:19,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-05 14:47:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:19,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:19,572 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:19,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7646,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:19,772 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash -320984176, now seen corresponding path program 354 times [2021-06-05 14:47:19,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:19,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066467046] [2021-06-05 14:47:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:19,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:19,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066467046] [2021-06-05 14:47:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066467046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285264367] [2021-06-05 14:47:19,925 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:20,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:47:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:20,368 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_317, v_prenex_318], 1=[ends_with_10]} [2021-06-05 14:47:20,372 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 4 treesize of output 2 [2021-06-05 14:47:20,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,376 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 4 treesize of output 2 [2021-06-05 14:47:20,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,380 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 4 treesize of output 2 [2021-06-05 14:47:20,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:20,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,387 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 4 treesize of output 2 [2021-06-05 14:47:20,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,392 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 4 treesize of output 2 [2021-06-05 14:47:20,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,517 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 14:47:20,518 INFO L628 ElimStorePlain]: treesize reduction 180, result has 39.6 percent of original size [2021-06-05 14:47:20,518 INFO L518 ElimStorePlain]: Eliminatee v_prenex_317 vanished before elimination [2021-06-05 14:47:20,520 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 3 treesize of output 1 [2021-06-05 14:47:20,521 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,524 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 3 treesize of output 1 [2021-06-05 14:47:20,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:20,577 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 4 treesize of output 2 [2021-06-05 14:47:20,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,581 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 3 treesize of output 1 [2021-06-05 14:47:20,581 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,584 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 4 treesize of output 2 [2021-06-05 14:47:20,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,587 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 4 treesize of output 2 [2021-06-05 14:47:20,588 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:20,656 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-05 14:47:20,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:20,658 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:353, output treesize:31 [2021-06-05 14:47:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:20,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285264367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:20,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:20,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:47:20,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036440528] [2021-06-05 14:47:20,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:20,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:20,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:20,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:20,737 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:21,307 INFO L93 Difference]: Finished difference Result 1574 states and 5014 transitions. [2021-06-05 14:47:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:47:21,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:21,310 INFO L225 Difference]: With dead ends: 1574 [2021-06-05 14:47:21,310 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 14:47:21,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:47:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 14:47:21,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1163. [2021-06-05 14:47:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.2900172117039586) internal successors, (3823), 1162 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3823 transitions. [2021-06-05 14:47:21,322 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3823 transitions. Word has length 24 [2021-06-05 14:47:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:21,322 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 3823 transitions. [2021-06-05 14:47:21,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:21,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3823 transitions. [2021-06-05 14:47:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:21,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:21,323 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:21,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7695 [2021-06-05 14:47:21,524 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:21,524 INFO L82 PathProgramCache]: Analyzing trace with hash 825622932, now seen corresponding path program 355 times [2021-06-05 14:47:21,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:21,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229330712] [2021-06-05 14:47:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:21,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:21,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229330712] [2021-06-05 14:47:21,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229330712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:21,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51416830] [2021-06-05 14:47:21,692 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:22,146 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_319], 1=[ends_with_10]} [2021-06-05 14:47:22,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:47:22,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,154 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 3 treesize of output 1 [2021-06-05 14:47:22,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,293 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 14:47:22,294 INFO L628 ElimStorePlain]: treesize reduction 112, result has 57.4 percent of original size [2021-06-05 14:47:22,296 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 3 treesize of output 1 [2021-06-05 14:47:22,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,300 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 4 treesize of output 2 [2021-06-05 14:47:22,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,303 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 3 treesize of output 1 [2021-06-05 14:47:22,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,307 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 4 treesize of output 2 [2021-06-05 14:47:22,307 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,310 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 4 treesize of output 2 [2021-06-05 14:47:22,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,408 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.2 percent of original size [2021-06-05 14:47:22,411 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 3 treesize of output 1 [2021-06-05 14:47:22,412 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,414 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 4 treesize of output 2 [2021-06-05 14:47:22,415 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,417 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 4 treesize of output 2 [2021-06-05 14:47:22,418 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,420 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 4 treesize of output 2 [2021-06-05 14:47:22,421 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:22,488 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-05 14:47:22,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:47:22,489 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:298, output treesize:31 [2021-06-05 14:47:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51416830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:22,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:22,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 14:47:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656186977] [2021-06-05 14:47:22,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:47:22,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:22,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:47:22,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:47:22,569 INFO L87 Difference]: Start difference. First operand 1163 states and 3823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:23,098 INFO L93 Difference]: Finished difference Result 1612 states and 5118 transitions. [2021-06-05 14:47:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:47:23,099 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:23,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:23,101 INFO L225 Difference]: With dead ends: 1612 [2021-06-05 14:47:23,101 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 14:47:23,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 598.2ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:47:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 14:47:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1137. [2021-06-05 14:47:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.273767605633803) internal successors, (3719), 1136 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3719 transitions. [2021-06-05 14:47:23,113 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3719 transitions. Word has length 24 [2021-06-05 14:47:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:23,113 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3719 transitions. [2021-06-05 14:47:23,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3719 transitions. [2021-06-05 14:47:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:23,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:23,114 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:23,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7759 [2021-06-05 14:47:23,315 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:23,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:23,315 INFO L82 PathProgramCache]: Analyzing trace with hash 252674682, now seen corresponding path program 356 times [2021-06-05 14:47:23,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:23,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034662803] [2021-06-05 14:47:23,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:23,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034662803] [2021-06-05 14:47:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034662803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48607754] [2021-06-05 14:47:23,409 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:23,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:23,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:23,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:23,626 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 4 treesize of output 2 [2021-06-05 14:47:23,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:23,691 INFO L628 ElimStorePlain]: treesize reduction 29, result has 71.8 percent of original size [2021-06-05 14:47:23,694 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 4 treesize of output 2 [2021-06-05 14:47:23,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:23,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:23,726 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 3 treesize of output 1 [2021-06-05 14:47:23,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:23,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:23,755 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-05 14:47:23,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:47:23,757 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:59 [2021-06-05 14:47:23,817 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 3 treesize of output 1 [2021-06-05 14:47:23,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:23,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:23,821 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 8 treesize of output 1 [2021-06-05 14:47:23,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:23,864 INFO L628 ElimStorePlain]: treesize reduction 23, result has 67.6 percent of original size [2021-06-05 14:47:23,867 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 4 treesize of output 2 [2021-06-05 14:47:23,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:23,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:23,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:23,885 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-05 14:47:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:47:23,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48607754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:23,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:23,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:47:23,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674335503] [2021-06-05 14:47:23,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:23,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:23,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:23,964 INFO L87 Difference]: Start difference. First operand 1137 states and 3719 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:25,227 INFO L93 Difference]: Finished difference Result 1825 states and 5709 transitions. [2021-06-05 14:47:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:47:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:25,229 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 14:47:25,229 INFO L226 Difference]: Without dead ends: 1684 [2021-06-05 14:47:25,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:47:25,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-05 14:47:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1146. [2021-06-05 14:47:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2995633187772926) internal successors, (3778), 1145 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3778 transitions. [2021-06-05 14:47:25,243 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3778 transitions. Word has length 24 [2021-06-05 14:47:25,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:25,243 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3778 transitions. [2021-06-05 14:47:25,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:25,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3778 transitions. [2021-06-05 14:47:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:47:25,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:25,244 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:25,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7829 [2021-06-05 14:47:25,444 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:25,445 INFO L82 PathProgramCache]: Analyzing trace with hash -591717378, now seen corresponding path program 357 times [2021-06-05 14:47:25,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:25,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415072920] [2021-06-05 14:47:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:47:25,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:25,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415072920] [2021-06-05 14:47:25,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415072920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:25,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769609659] [2021-06-05 14:47:25,532 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:25,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:47:25,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:47:25,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:25,784 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 3 treesize of output 1 [2021-06-05 14:47:25,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:25,872 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.2 percent of original size [2021-06-05 14:47:25,875 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 3 treesize of output 1 [2021-06-05 14:47:25,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:25,954 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-05 14:47:25,956 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 4 treesize of output 2 [2021-06-05 14:47:25,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,016 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-05 14:47:26,018 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 4 treesize of output 2 [2021-06-05 14:47:26,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:26,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:47:26,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:165, output treesize:59 [2021-06-05 14:47:26,115 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 4 treesize of output 2 [2021-06-05 14:47:26,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:47:26,119 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 9 treesize of output 2 [2021-06-05 14:47:26,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,166 INFO L628 ElimStorePlain]: treesize reduction 40, result has 54.0 percent of original size [2021-06-05 14:47:26,168 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 3 treesize of output 1 [2021-06-05 14:47:26,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:47:26,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:47:26,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:47:26,188 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-05 14:47:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:26,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769609659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:26,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:26,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 14:47:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801937497] [2021-06-05 14:47:26,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:47:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:47:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:47:26,268 INFO L87 Difference]: Start difference. First operand 1146 states and 3778 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:27,684 INFO L93 Difference]: Finished difference Result 1665 states and 5212 transitions. [2021-06-05 14:47:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:47:27,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 14:47:27,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:27,686 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 14:47:27,686 INFO L226 Difference]: Without dead ends: 1518 [2021-06-05 14:47:27,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1119.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:47:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-05 14:47:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1069. [2021-06-05 14:47:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.25) internal successors, (3471), 1068 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3471 transitions. [2021-06-05 14:47:27,699 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3471 transitions. Word has length 24 [2021-06-05 14:47:27,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:27,699 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3471 transitions. [2021-06-05 14:47:27,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3471 transitions. [2021-06-05 14:47:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:27,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:27,700 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:27,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7847 [2021-06-05 14:47:27,900 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1468889190, now seen corresponding path program 358 times [2021-06-05 14:47:27,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:27,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471844481] [2021-06-05 14:47:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:27,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471844481] [2021-06-05 14:47:27,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471844481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984810505] [2021-06-05 14:47:27,995 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:28,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:28,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:28,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984810505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:28,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:28,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:28,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772817984] [2021-06-05 14:47:28,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:28,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:28,383 INFO L87 Difference]: Start difference. First operand 1069 states and 3471 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:31,393 INFO L93 Difference]: Finished difference Result 2034 states and 6206 transitions. [2021-06-05 14:47:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 14:47:31,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:31,396 INFO L225 Difference]: With dead ends: 2034 [2021-06-05 14:47:31,396 INFO L226 Difference]: Without dead ends: 1956 [2021-06-05 14:47:31,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 1864.9ms TimeCoverageRelationStatistics Valid=782, Invalid=8148, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 14:47:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-05 14:47:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1101. [2021-06-05 14:47:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2636363636363637) internal successors, (3590), 1100 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3590 transitions. [2021-06-05 14:47:31,411 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3590 transitions. Word has length 25 [2021-06-05 14:47:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:31,411 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3590 transitions. [2021-06-05 14:47:31,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3590 transitions. [2021-06-05 14:47:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:31,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:31,412 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:31,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7875,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:31,613 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash 195955482, now seen corresponding path program 359 times [2021-06-05 14:47:31,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:31,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063807602] [2021-06-05 14:47:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:31,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063807602] [2021-06-05 14:47:31,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063807602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:31,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092337020] [2021-06-05 14:47:31,698 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:31,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:47:31,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092337020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:32,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:32,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:32,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107997558] [2021-06-05 14:47:32,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:32,290 INFO L87 Difference]: Start difference. First operand 1101 states and 3590 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:34,610 INFO L93 Difference]: Finished difference Result 1986 states and 6129 transitions. [2021-06-05 14:47:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 14:47:34,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:34,613 INFO L225 Difference]: With dead ends: 1986 [2021-06-05 14:47:34,613 INFO L226 Difference]: Without dead ends: 1908 [2021-06-05 14:47:34,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1194.2ms TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 14:47:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-05 14:47:34,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1096. [2021-06-05 14:47:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.2831050228310503) internal successors, (3595), 1095 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3595 transitions. [2021-06-05 14:47:34,628 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3595 transitions. Word has length 25 [2021-06-05 14:47:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:34,629 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3595 transitions. [2021-06-05 14:47:34,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3595 transitions. [2021-06-05 14:47:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:34,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:34,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:34,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7884 [2021-06-05 14:47:34,830 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1381037462, now seen corresponding path program 360 times [2021-06-05 14:47:34,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:34,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007116842] [2021-06-05 14:47:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:34,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007116842] [2021-06-05 14:47:34,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007116842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:34,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391994391] [2021-06-05 14:47:34,921 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:35,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:47:35,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:35,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391994391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:35,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:35,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:35,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436635078] [2021-06-05 14:47:35,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:35,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:35,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:35,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:35,398 INFO L87 Difference]: Start difference. First operand 1096 states and 3595 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:37,504 INFO L93 Difference]: Finished difference Result 2064 states and 6370 transitions. [2021-06-05 14:47:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 14:47:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:37,507 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 14:47:37,507 INFO L226 Difference]: Without dead ends: 2012 [2021-06-05 14:47:37,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1196.8ms TimeCoverageRelationStatistics Valid=593, Invalid=5259, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 14:47:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-05 14:47:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1064. [2021-06-05 14:47:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.3029162746942617) internal successors, (3511), 1063 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3511 transitions. [2021-06-05 14:47:37,521 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3511 transitions. Word has length 25 [2021-06-05 14:47:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:37,521 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3511 transitions. [2021-06-05 14:47:37,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3511 transitions. [2021-06-05 14:47:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:37,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:37,522 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:37,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7982 [2021-06-05 14:47:37,723 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash 496440448, now seen corresponding path program 361 times [2021-06-05 14:47:37,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:37,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894531565] [2021-06-05 14:47:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:37,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894531565] [2021-06-05 14:47:37,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894531565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:37,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073662423] [2021-06-05 14:47:37,807 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073662423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:38,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:38,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:38,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804068311] [2021-06-05 14:47:38,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:38,189 INFO L87 Difference]: Start difference. First operand 1064 states and 3511 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:39,622 INFO L93 Difference]: Finished difference Result 1617 states and 5059 transitions. [2021-06-05 14:47:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 14:47:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:39,624 INFO L225 Difference]: With dead ends: 1617 [2021-06-05 14:47:39,624 INFO L226 Difference]: Without dead ends: 1468 [2021-06-05 14:47:39,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=331, Invalid=3451, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 14:47:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-06-05 14:47:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1074. [2021-06-05 14:47:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.302889095992544) internal successors, (3544), 1073 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3544 transitions. [2021-06-05 14:47:39,636 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3544 transitions. Word has length 25 [2021-06-05 14:47:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:39,636 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3544 transitions. [2021-06-05 14:47:39,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3544 transitions. [2021-06-05 14:47:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:39,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:39,637 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:39,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8017 [2021-06-05 14:47:39,838 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:39,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:39,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1193889788, now seen corresponding path program 362 times [2021-06-05 14:47:39,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:39,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83224651] [2021-06-05 14:47:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:39,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83224651] [2021-06-05 14:47:39,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83224651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120236064] [2021-06-05 14:47:39,937 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:40,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:40,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:40,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120236064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:40,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:40,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:40,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190610938] [2021-06-05 14:47:40,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:40,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:40,313 INFO L87 Difference]: Start difference. First operand 1074 states and 3544 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:41,934 INFO L93 Difference]: Finished difference Result 1700 states and 5327 transitions. [2021-06-05 14:47:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 14:47:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:41,937 INFO L225 Difference]: With dead ends: 1700 [2021-06-05 14:47:41,937 INFO L226 Difference]: Without dead ends: 1579 [2021-06-05 14:47:41,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1111.6ms TimeCoverageRelationStatistics Valid=409, Invalid=4283, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 14:47:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-05 14:47:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1087. [2021-06-05 14:47:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.303867403314917) internal successors, (3588), 1086 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3588 transitions. [2021-06-05 14:47:41,949 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3588 transitions. Word has length 25 [2021-06-05 14:47:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:41,949 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3588 transitions. [2021-06-05 14:47:41,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3588 transitions. [2021-06-05 14:47:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:41,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:41,950 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:42,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8029 [2021-06-05 14:47:42,151 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash -723274496, now seen corresponding path program 363 times [2021-06-05 14:47:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:42,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881387347] [2021-06-05 14:47:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:42,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:42,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881387347] [2021-06-05 14:47:42,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881387347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:42,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830879720] [2021-06-05 14:47:42,246 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:42,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:47:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:42,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830879720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:42,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:42,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:42,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040830506] [2021-06-05 14:47:42,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:42,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:42,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:42,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:42,611 INFO L87 Difference]: Start difference. First operand 1087 states and 3588 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:44,805 INFO L93 Difference]: Finished difference Result 1756 states and 5467 transitions. [2021-06-05 14:47:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 14:47:44,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:44,807 INFO L225 Difference]: With dead ends: 1756 [2021-06-05 14:47:44,808 INFO L226 Difference]: Without dead ends: 1678 [2021-06-05 14:47:44,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1573.1ms TimeCoverageRelationStatistics Valid=641, Invalid=5365, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 14:47:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-06-05 14:47:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1088. [2021-06-05 14:47:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.3045078196872124) internal successors, (3592), 1087 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3592 transitions. [2021-06-05 14:47:44,821 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3592 transitions. Word has length 25 [2021-06-05 14:47:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:44,822 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3592 transitions. [2021-06-05 14:47:44,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3592 transitions. [2021-06-05 14:47:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:44,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:44,823 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:45,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8047 [2021-06-05 14:47:45,023 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 461807484, now seen corresponding path program 364 times [2021-06-05 14:47:45,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:45,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061640812] [2021-06-05 14:47:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:45,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:45,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061640812] [2021-06-05 14:47:45,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061640812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:45,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12243001] [2021-06-05 14:47:45,123 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:45,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:45,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:45,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12243001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:45,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:45,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:45,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425383127] [2021-06-05 14:47:45,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:45,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:45,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:45,510 INFO L87 Difference]: Start difference. First operand 1088 states and 3592 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:46,919 INFO L93 Difference]: Finished difference Result 1606 states and 5071 transitions. [2021-06-05 14:47:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:47:46,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:46,921 INFO L225 Difference]: With dead ends: 1606 [2021-06-05 14:47:46,921 INFO L226 Difference]: Without dead ends: 1554 [2021-06-05 14:47:46,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 974.6ms TimeCoverageRelationStatistics Valid=500, Invalid=3406, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 14:47:46,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-06-05 14:47:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1064. [2021-06-05 14:47:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.303857008466604) internal successors, (3512), 1063 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:46,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3512 transitions. [2021-06-05 14:47:46,934 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3512 transitions. Word has length 25 [2021-06-05 14:47:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:46,934 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3512 transitions. [2021-06-05 14:47:46,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:46,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3512 transitions. [2021-06-05 14:47:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:46,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:46,935 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:47,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8060,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:47,135 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:47,136 INFO L82 PathProgramCache]: Analyzing trace with hash 387650504, now seen corresponding path program 365 times [2021-06-05 14:47:47,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:47,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435384950] [2021-06-05 14:47:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:47,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435384950] [2021-06-05 14:47:47,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435384950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140556646] [2021-06-05 14:47:47,217 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:47,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:47:47,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:47,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:47,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:47,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140556646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:47,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:47,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:47,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700652046] [2021-06-05 14:47:47,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:47,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:47,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:47,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:47,571 INFO L87 Difference]: Start difference. First operand 1064 states and 3512 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:49,025 INFO L93 Difference]: Finished difference Result 1593 states and 4983 transitions. [2021-06-05 14:47:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 14:47:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:49,028 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 14:47:49,028 INFO L226 Difference]: Without dead ends: 1472 [2021-06-05 14:47:49,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=354, Invalid=3552, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 14:47:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-05 14:47:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1064. [2021-06-05 14:47:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.2925682031984946) internal successors, (3500), 1063 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3500 transitions. [2021-06-05 14:47:49,040 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3500 transitions. Word has length 25 [2021-06-05 14:47:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:49,040 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3500 transitions. [2021-06-05 14:47:49,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3500 transitions. [2021-06-05 14:47:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:49,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:49,041 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:49,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8079,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:49,245 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash -344431800, now seen corresponding path program 366 times [2021-06-05 14:47:49,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:49,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969257574] [2021-06-05 14:47:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:49,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:49,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969257574] [2021-06-05 14:47:49,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969257574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:49,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022802124] [2021-06-05 14:47:49,350 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:49,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:47:49,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 14:47:49,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:49,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022802124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:49,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:49,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:49,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152076093] [2021-06-05 14:47:49,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:49,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:49,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:49,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:49,757 INFO L87 Difference]: Start difference. First operand 1064 states and 3500 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:51,125 INFO L93 Difference]: Finished difference Result 1555 states and 4863 transitions. [2021-06-05 14:47:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:47:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:51,127 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 14:47:51,127 INFO L226 Difference]: Without dead ends: 1503 [2021-06-05 14:47:51,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1034.3ms TimeCoverageRelationStatistics Valid=496, Invalid=3536, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 14:47:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-06-05 14:47:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1025. [2021-06-05 14:47:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.265625) internal successors, (3344), 1024 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3344 transitions. [2021-06-05 14:47:51,139 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3344 transitions. Word has length 25 [2021-06-05 14:47:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:51,139 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3344 transitions. [2021-06-05 14:47:51,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3344 transitions. [2021-06-05 14:47:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:51,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:51,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:51,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8092,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:51,342 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash 142687432, now seen corresponding path program 367 times [2021-06-05 14:47:51,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:51,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019758054] [2021-06-05 14:47:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:51,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:51,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019758054] [2021-06-05 14:47:51,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019758054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:51,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587211098] [2021-06-05 14:47:51,426 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:51,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:51,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587211098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:51,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:51,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:51,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547181345] [2021-06-05 14:47:51,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:51,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:51,787 INFO L87 Difference]: Start difference. First operand 1025 states and 3344 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:53,340 INFO L93 Difference]: Finished difference Result 1634 states and 5077 transitions. [2021-06-05 14:47:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 14:47:53,341 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:53,344 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 14:47:53,344 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 14:47:53,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 934.8ms TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 14:47:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 14:47:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 928. [2021-06-05 14:47:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.236245954692557) internal successors, (3000), 927 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3000 transitions. [2021-06-05 14:47:53,358 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3000 transitions. Word has length 25 [2021-06-05 14:47:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:53,358 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3000 transitions. [2021-06-05 14:47:53,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3000 transitions. [2021-06-05 14:47:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:53,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:53,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:53,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8109,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:53,559 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:53,560 INFO L82 PathProgramCache]: Analyzing trace with hash -720949964, now seen corresponding path program 368 times [2021-06-05 14:47:53,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:53,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141941357] [2021-06-05 14:47:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:53,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:53,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141941357] [2021-06-05 14:47:53,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141941357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:53,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330251346] [2021-06-05 14:47:53,648 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:53,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:47:53,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:53,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:54,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330251346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:54,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:54,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:54,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326383818] [2021-06-05 14:47:54,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:54,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:54,006 INFO L87 Difference]: Start difference. First operand 928 states and 3000 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:55,428 INFO L93 Difference]: Finished difference Result 1353 states and 4151 transitions. [2021-06-05 14:47:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:47:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:55,430 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 14:47:55,430 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 14:47:55,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=344, Invalid=2962, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 14:47:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 14:47:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 934. [2021-06-05 14:47:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2293676312968915) internal successors, (3013), 933 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3013 transitions. [2021-06-05 14:47:55,449 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3013 transitions. Word has length 25 [2021-06-05 14:47:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:55,449 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3013 transitions. [2021-06-05 14:47:55,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3013 transitions. [2021-06-05 14:47:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:55,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:55,450 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:55,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8115 [2021-06-05 14:47:55,651 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:55,651 INFO L82 PathProgramCache]: Analyzing trace with hash -23500624, now seen corresponding path program 369 times [2021-06-05 14:47:55,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:55,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947593723] [2021-06-05 14:47:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:55,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:55,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947593723] [2021-06-05 14:47:55,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947593723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:55,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998681873] [2021-06-05 14:47:55,754 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:55,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:47:55,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:56,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998681873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:56,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:56,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:56,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196024302] [2021-06-05 14:47:56,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:56,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:56,108 INFO L87 Difference]: Start difference. First operand 934 states and 3013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:47:57,460 INFO L93 Difference]: Finished difference Result 1438 states and 4422 transitions. [2021-06-05 14:47:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:47:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:47:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:47:57,462 INFO L225 Difference]: With dead ends: 1438 [2021-06-05 14:47:57,462 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 14:47:57,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1027.1ms TimeCoverageRelationStatistics Valid=363, Invalid=3177, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:47:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 14:47:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 945. [2021-06-05 14:47:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.2288135593220337) internal successors, (3048), 944 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:47:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3048 transitions. [2021-06-05 14:47:57,472 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3048 transitions. Word has length 25 [2021-06-05 14:47:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:47:57,472 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3048 transitions. [2021-06-05 14:47:57,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:47:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3048 transitions. [2021-06-05 14:47:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:47:57,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:47:57,473 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:47:57,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8131 [2021-06-05 14:47:57,674 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:47:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:47:57,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1940664908, now seen corresponding path program 370 times [2021-06-05 14:47:57,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:47:57,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011714443] [2021-06-05 14:47:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:47:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:47:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:57,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:47:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011714443] [2021-06-05 14:47:57,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011714443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680545159] [2021-06-05 14:47:57,773 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:47:57,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:47:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:47:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:47:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:47:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:47:58,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680545159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:47:58,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:47:58,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:47:58,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414100320] [2021-06-05 14:47:58,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:47:58,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:47:58,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:47:58,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:47:58,153 INFO L87 Difference]: Start difference. First operand 945 states and 3048 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:00,105 INFO L93 Difference]: Finished difference Result 1649 states and 5064 transitions. [2021-06-05 14:48:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 14:48:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:00,107 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 14:48:00,107 INFO L226 Difference]: Without dead ends: 1571 [2021-06-05 14:48:00,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1579.5ms TimeCoverageRelationStatistics Valid=658, Invalid=5348, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 14:48:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-06-05 14:48:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 988. [2021-06-05 14:48:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.243161094224924) internal successors, (3201), 987 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3201 transitions. [2021-06-05 14:48:00,119 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3201 transitions. Word has length 25 [2021-06-05 14:48:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:00,119 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 3201 transitions. [2021-06-05 14:48:00,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3201 transitions. [2021-06-05 14:48:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:00,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:00,120 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:00,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8139,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:00,321 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash -755582928, now seen corresponding path program 371 times [2021-06-05 14:48:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:00,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094905030] [2021-06-05 14:48:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:00,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:00,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094905030] [2021-06-05 14:48:00,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094905030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:00,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299642086] [2021-06-05 14:48:00,434 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:00,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:48:00,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:00,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:00,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299642086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:00,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:00,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:00,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137072866] [2021-06-05 14:48:00,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:00,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:00,821 INFO L87 Difference]: Start difference. First operand 988 states and 3201 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:02,151 INFO L93 Difference]: Finished difference Result 1507 states and 4689 transitions. [2021-06-05 14:48:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 14:48:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:02,153 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 14:48:02,153 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 14:48:02,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1039.5ms TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 14:48:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 14:48:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 920. [2021-06-05 14:48:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.2241566920565834) internal successors, (2963), 919 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2963 transitions. [2021-06-05 14:48:02,164 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2963 transitions. Word has length 25 [2021-06-05 14:48:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:02,165 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2963 transitions. [2021-06-05 14:48:02,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2963 transitions. [2021-06-05 14:48:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:02,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:02,166 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:02,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-06-05 14:48:02,366 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash -829739908, now seen corresponding path program 372 times [2021-06-05 14:48:02,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:02,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710947162] [2021-06-05 14:48:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:02,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:02,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710947162] [2021-06-05 14:48:02,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710947162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:02,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663407805] [2021-06-05 14:48:02,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:02,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:48:02,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:02,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663407805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:02,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:02,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:02,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342902523] [2021-06-05 14:48:02,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:02,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:02,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:02,821 INFO L87 Difference]: Start difference. First operand 920 states and 2963 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:04,170 INFO L93 Difference]: Finished difference Result 1457 states and 4481 transitions. [2021-06-05 14:48:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:48:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:04,172 INFO L225 Difference]: With dead ends: 1457 [2021-06-05 14:48:04,172 INFO L226 Difference]: Without dead ends: 1336 [2021-06-05 14:48:04,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 828.9ms TimeCoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 14:48:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-06-05 14:48:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 947. [2021-06-05 14:48:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2283298097251585) internal successors, (3054), 946 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3054 transitions. [2021-06-05 14:48:04,183 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3054 transitions. Word has length 25 [2021-06-05 14:48:04,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:04,183 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3054 transitions. [2021-06-05 14:48:04,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3054 transitions. [2021-06-05 14:48:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:04,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:04,184 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:04,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8169 [2021-06-05 14:48:04,384 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:04,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1548063104, now seen corresponding path program 373 times [2021-06-05 14:48:04,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:04,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633065520] [2021-06-05 14:48:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:04,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:04,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633065520] [2021-06-05 14:48:04,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633065520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:04,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359734798] [2021-06-05 14:48:04,473 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:04,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:04,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359734798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:04,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:04,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:04,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057610450] [2021-06-05 14:48:04,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:04,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:04,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:04,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:04,826 INFO L87 Difference]: Start difference. First operand 947 states and 3054 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:06,816 INFO L93 Difference]: Finished difference Result 1637 states and 5024 transitions. [2021-06-05 14:48:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 14:48:06,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:06,818 INFO L225 Difference]: With dead ends: 1637 [2021-06-05 14:48:06,818 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 14:48:06,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1550.2ms TimeCoverageRelationStatistics Valid=674, Invalid=5488, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 14:48:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 14:48:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 991. [2021-06-05 14:48:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.2444444444444445) internal successors, (3212), 990 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3212 transitions. [2021-06-05 14:48:06,832 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3212 transitions. Word has length 25 [2021-06-05 14:48:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:06,832 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3212 transitions. [2021-06-05 14:48:06,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3212 transitions. [2021-06-05 14:48:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:06,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:06,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:07,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8186,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:07,034 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1561822212, now seen corresponding path program 374 times [2021-06-05 14:48:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:07,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794959471] [2021-06-05 14:48:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794959471] [2021-06-05 14:48:07,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794959471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:07,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389203480] [2021-06-05 14:48:07,127 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:07,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:07,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389203480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:07,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:07,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946565985] [2021-06-05 14:48:07,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:07,499 INFO L87 Difference]: Start difference. First operand 991 states and 3212 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:08,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:08,871 INFO L93 Difference]: Finished difference Result 1495 states and 4649 transitions. [2021-06-05 14:48:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 14:48:08,871 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:08,873 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 14:48:08,873 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 14:48:08,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1022.8ms TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 14:48:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 14:48:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 935. [2021-06-05 14:48:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.226980728051392) internal successors, (3014), 934 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3014 transitions. [2021-06-05 14:48:08,885 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3014 transitions. Word has length 25 [2021-06-05 14:48:08,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:08,885 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 3014 transitions. [2021-06-05 14:48:08,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3014 transitions. [2021-06-05 14:48:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:08,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:08,886 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:09,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8195 [2021-06-05 14:48:09,086 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:09,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 275129396, now seen corresponding path program 375 times [2021-06-05 14:48:09,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:09,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780993138] [2021-06-05 14:48:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:09,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780993138] [2021-06-05 14:48:09,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780993138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:09,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483822865] [2021-06-05 14:48:09,192 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:09,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:48:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483822865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:09,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:09,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:09,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715102655] [2021-06-05 14:48:09,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:09,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:09,616 INFO L87 Difference]: Start difference. First operand 935 states and 3014 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:11,133 INFO L93 Difference]: Finished difference Result 1836 states and 5621 transitions. [2021-06-05 14:48:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 14:48:11,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:11,135 INFO L225 Difference]: With dead ends: 1836 [2021-06-05 14:48:11,135 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 14:48:11,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1013.7ms TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 14:48:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 14:48:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1005. [2021-06-05 14:48:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.25796812749004) internal successors, (3271), 1004 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3271 transitions. [2021-06-05 14:48:11,148 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3271 transitions. Word has length 25 [2021-06-05 14:48:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:11,148 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3271 transitions. [2021-06-05 14:48:11,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:11,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3271 transitions. [2021-06-05 14:48:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:11,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:11,149 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:11,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8214 [2021-06-05 14:48:11,350 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:11,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1460211376, now seen corresponding path program 376 times [2021-06-05 14:48:11,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:11,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307899462] [2021-06-05 14:48:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:11,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:11,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307899462] [2021-06-05 14:48:11,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307899462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:11,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605049925] [2021-06-05 14:48:11,438 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:11,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:11,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:11,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:11,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605049925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:11,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:11,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:11,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896947680] [2021-06-05 14:48:11,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:11,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:11,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:11,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:11,897 INFO L87 Difference]: Start difference. First operand 1005 states and 3271 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:13,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:13,218 INFO L93 Difference]: Finished difference Result 1911 states and 5874 transitions. [2021-06-05 14:48:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:48:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:13,221 INFO L225 Difference]: With dead ends: 1911 [2021-06-05 14:48:13,221 INFO L226 Difference]: Without dead ends: 1859 [2021-06-05 14:48:13,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=534, Invalid=4296, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 14:48:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-06-05 14:48:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 992. [2021-06-05 14:48:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.256306760847629) internal successors, (3227), 991 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:13,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3227 transitions. [2021-06-05 14:48:13,234 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3227 transitions. Word has length 25 [2021-06-05 14:48:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:13,234 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3227 transitions. [2021-06-05 14:48:13,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3227 transitions. [2021-06-05 14:48:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:13,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:13,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:13,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-06-05 14:48:13,436 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:13,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1074702980, now seen corresponding path program 377 times [2021-06-05 14:48:13,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:13,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094375811] [2021-06-05 14:48:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:13,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:13,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094375811] [2021-06-05 14:48:13,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094375811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:13,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812757271] [2021-06-05 14:48:13,517 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 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:13,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:48:13,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:13,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:13,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812757271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:13,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:13,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:13,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874590055] [2021-06-05 14:48:13,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:13,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:13,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:13,880 INFO L87 Difference]: Start difference. First operand 992 states and 3227 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:15,630 INFO L93 Difference]: Finished difference Result 1655 states and 5144 transitions. [2021-06-05 14:48:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 14:48:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:15,633 INFO L225 Difference]: With dead ends: 1655 [2021-06-05 14:48:15,633 INFO L226 Difference]: Without dead ends: 1603 [2021-06-05 14:48:15,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 931.0ms TimeCoverageRelationStatistics Valid=518, Invalid=4738, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:48:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-06-05 14:48:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 906. [2021-06-05 14:48:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2220994475138123) internal successors, (2916), 905 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2916 transitions. [2021-06-05 14:48:15,644 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2916 transitions. Word has length 25 [2021-06-05 14:48:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:15,644 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2916 transitions. [2021-06-05 14:48:15,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2916 transitions. [2021-06-05 14:48:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:15,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:15,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:15,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8287,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:15,846 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash -53353936, now seen corresponding path program 378 times [2021-06-05 14:48:15,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:15,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491600526] [2021-06-05 14:48:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:15,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:15,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491600526] [2021-06-05 14:48:15,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491600526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:15,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202219062] [2021-06-05 14:48:15,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:16,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:48:16,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:16,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202219062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:16,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:16,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:16,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524905636] [2021-06-05 14:48:16,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:16,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:16,292 INFO L87 Difference]: Start difference. First operand 906 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:17,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:17,631 INFO L93 Difference]: Finished difference Result 1471 states and 4521 transitions. [2021-06-05 14:48:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 14:48:17,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:17,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:17,633 INFO L225 Difference]: With dead ends: 1471 [2021-06-05 14:48:17,634 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 14:48:17,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=370, Invalid=3536, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 14:48:17,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 14:48:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 948. [2021-06-05 14:48:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.2270327349524814) internal successors, (3056), 947 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3056 transitions. [2021-06-05 14:48:17,644 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3056 transitions. Word has length 25 [2021-06-05 14:48:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:17,644 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 3056 transitions. [2021-06-05 14:48:17,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3056 transitions. [2021-06-05 14:48:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:17,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:17,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:17,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8293,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:17,846 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:17,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1970518220, now seen corresponding path program 379 times [2021-06-05 14:48:17,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:17,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897970500] [2021-06-05 14:48:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:17,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:17,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897970500] [2021-06-05 14:48:17,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897970500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:17,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730491161] [2021-06-05 14:48:17,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:18,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:18,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730491161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:18,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:18,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:18,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132874665] [2021-06-05 14:48:18,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:18,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:18,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:18,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:18,319 INFO L87 Difference]: Start difference. First operand 948 states and 3056 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:20,420 INFO L93 Difference]: Finished difference Result 1694 states and 5196 transitions. [2021-06-05 14:48:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 14:48:20,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:20,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:20,422 INFO L225 Difference]: With dead ends: 1694 [2021-06-05 14:48:20,422 INFO L226 Difference]: Without dead ends: 1616 [2021-06-05 14:48:20,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 1614.9ms TimeCoverageRelationStatistics Valid=741, Invalid=6065, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 14:48:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-05 14:48:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 992. [2021-06-05 14:48:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2431886982845612) internal successors, (3214), 991 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3214 transitions. [2021-06-05 14:48:20,434 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3214 transitions. Word has length 25 [2021-06-05 14:48:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:20,434 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3214 transitions. [2021-06-05 14:48:20,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3214 transitions. [2021-06-05 14:48:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:20,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:20,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:20,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8310 [2021-06-05 14:48:20,636 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:20,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:20,636 INFO L82 PathProgramCache]: Analyzing trace with hash -785436240, now seen corresponding path program 380 times [2021-06-05 14:48:20,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:20,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422961170] [2021-06-05 14:48:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:20,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:20,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422961170] [2021-06-05 14:48:20,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422961170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:20,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407654617] [2021-06-05 14:48:20,731 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 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:20,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:20,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:20,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:20,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:21,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407654617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:21,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:21,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:21,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284392909] [2021-06-05 14:48:21,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:21,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:21,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:21,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:21,095 INFO L87 Difference]: Start difference. First operand 992 states and 3214 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:22,440 INFO L93 Difference]: Finished difference Result 1552 states and 4821 transitions. [2021-06-05 14:48:22,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:48:22,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:22,442 INFO L225 Difference]: With dead ends: 1552 [2021-06-05 14:48:22,442 INFO L226 Difference]: Without dead ends: 1500 [2021-06-05 14:48:22,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 971.2ms TimeCoverageRelationStatistics Valid=640, Invalid=4616, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:48:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-05 14:48:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 936. [2021-06-05 14:48:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.225668449197861) internal successors, (3016), 935 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3016 transitions. [2021-06-05 14:48:22,456 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3016 transitions. Word has length 25 [2021-06-05 14:48:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:22,456 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 3016 transitions. [2021-06-05 14:48:22,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3016 transitions. [2021-06-05 14:48:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:22,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:22,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:22,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8328,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:22,658 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:22,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1051515368, now seen corresponding path program 381 times [2021-06-05 14:48:22,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:22,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379358087] [2021-06-05 14:48:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:22,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:22,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379358087] [2021-06-05 14:48:22,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379358087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:22,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048784742] [2021-06-05 14:48:22,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:22,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:48:22,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:22,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:23,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048784742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:23,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:23,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:23,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553333864] [2021-06-05 14:48:23,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:23,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:23,343 INFO L87 Difference]: Start difference. First operand 936 states and 3016 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:25,277 INFO L93 Difference]: Finished difference Result 1792 states and 5483 transitions. [2021-06-05 14:48:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 14:48:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:25,279 INFO L225 Difference]: With dead ends: 1792 [2021-06-05 14:48:25,279 INFO L226 Difference]: Without dead ends: 1714 [2021-06-05 14:48:25,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1473.6ms TimeCoverageRelationStatistics Valid=560, Invalid=4696, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:48:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-05 14:48:25,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1006. [2021-06-05 14:48:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.256716417910448) internal successors, (3273), 1005 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3273 transitions. [2021-06-05 14:48:25,292 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3273 transitions. Word has length 25 [2021-06-05 14:48:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:25,292 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3273 transitions. [2021-06-05 14:48:25,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3273 transitions. [2021-06-05 14:48:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:25,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:25,293 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:25,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-06-05 14:48:25,493 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2058369948, now seen corresponding path program 382 times [2021-06-05 14:48:25,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:25,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5250364] [2021-06-05 14:48:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:25,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:25,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5250364] [2021-06-05 14:48:25,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5250364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:25,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936878495] [2021-06-05 14:48:25,580 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 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:25,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:25,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:26,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936878495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:26,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:26,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:26,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506941285] [2021-06-05 14:48:26,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:26,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:26,024 INFO L87 Difference]: Start difference. First operand 1006 states and 3273 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:27,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:27,651 INFO L93 Difference]: Finished difference Result 1838 states and 5649 transitions. [2021-06-05 14:48:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:48:27,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:27,654 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 14:48:27,654 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 14:48:27,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1252.7ms TimeCoverageRelationStatistics Valid=686, Invalid=5014, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 14:48:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 14:48:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 993. [2021-06-05 14:48:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.255040322580645) internal successors, (3229), 992 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3229 transitions. [2021-06-05 14:48:27,668 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3229 transitions. Word has length 25 [2021-06-05 14:48:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:27,668 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3229 transitions. [2021-06-05 14:48:27,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3229 transitions. [2021-06-05 14:48:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:27,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:27,669 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:27,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8455 [2021-06-05 14:48:27,869 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash -298317008, now seen corresponding path program 383 times [2021-06-05 14:48:27,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:27,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740146473] [2021-06-05 14:48:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:27,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740146473] [2021-06-05 14:48:27,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740146473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:27,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660747988] [2021-06-05 14:48:27,952 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 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:28,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:48:28,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:28,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660747988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:28,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:28,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:28,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426937040] [2021-06-05 14:48:28,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:28,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:28,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:28,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:28,328 INFO L87 Difference]: Start difference. First operand 993 states and 3229 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:29,739 INFO L93 Difference]: Finished difference Result 1639 states and 5093 transitions. [2021-06-05 14:48:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:48:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:29,741 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 14:48:29,742 INFO L226 Difference]: Without dead ends: 1587 [2021-06-05 14:48:29,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 945.0ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 14:48:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-06-05 14:48:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 921. [2021-06-05 14:48:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.222826086956522) internal successors, (2965), 920 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2965 transitions. [2021-06-05 14:48:29,753 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2965 transitions. Word has length 25 [2021-06-05 14:48:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:29,753 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2965 transitions. [2021-06-05 14:48:29,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2965 transitions. [2021-06-05 14:48:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:29,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:29,754 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:29,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8485,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:29,954 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash 245276084, now seen corresponding path program 384 times [2021-06-05 14:48:29,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:29,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040756705] [2021-06-05 14:48:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:30,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:30,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040756705] [2021-06-05 14:48:30,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040756705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:30,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239878865] [2021-06-05 14:48:30,043 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:30,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:48:30,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:30,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:30,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239878865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:30,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:30,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:30,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586769656] [2021-06-05 14:48:30,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:30,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:30,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:30,525 INFO L87 Difference]: Start difference. First operand 921 states and 2965 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:32,411 INFO L93 Difference]: Finished difference Result 1809 states and 5531 transitions. [2021-06-05 14:48:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 14:48:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:32,413 INFO L225 Difference]: With dead ends: 1809 [2021-06-05 14:48:32,413 INFO L226 Difference]: Without dead ends: 1731 [2021-06-05 14:48:32,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1398.4ms TimeCoverageRelationStatistics Valid=524, Invalid=4032, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 14:48:32,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-06-05 14:48:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1020. [2021-06-05 14:48:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.2688910696761533) internal successors, (3331), 1019 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3331 transitions. [2021-06-05 14:48:32,425 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3331 transitions. Word has length 25 [2021-06-05 14:48:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:32,425 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3331 transitions. [2021-06-05 14:48:32,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3331 transitions. [2021-06-05 14:48:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:32,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:32,427 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:32,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8491,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:32,627 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:32,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1430358064, now seen corresponding path program 385 times [2021-06-05 14:48:32,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:32,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219815082] [2021-06-05 14:48:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:32,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219815082] [2021-06-05 14:48:32,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219815082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:32,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16755041] [2021-06-05 14:48:32,717 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 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:32,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:33,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16755041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:33,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:33,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:33,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706129071] [2021-06-05 14:48:33,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:33,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:33,401 INFO L87 Difference]: Start difference. First operand 1020 states and 3331 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:35,291 INFO L93 Difference]: Finished difference Result 1883 states and 5773 transitions. [2021-06-05 14:48:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 14:48:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:35,294 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 14:48:35,294 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 14:48:35,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 1424.4ms TimeCoverageRelationStatistics Valid=725, Invalid=5127, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 14:48:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 14:48:35,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1007. [2021-06-05 14:48:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2673956262425445) internal successors, (3287), 1006 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3287 transitions. [2021-06-05 14:48:35,307 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3287 transitions. Word has length 25 [2021-06-05 14:48:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:35,307 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3287 transitions. [2021-06-05 14:48:35,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3287 transitions. [2021-06-05 14:48:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:35,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:35,309 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:35,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8531 [2021-06-05 14:48:35,509 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1104556292, now seen corresponding path program 386 times [2021-06-05 14:48:35,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:35,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669335509] [2021-06-05 14:48:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:35,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669335509] [2021-06-05 14:48:35,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669335509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:35,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013398394] [2021-06-05 14:48:35,595 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 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:35,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:35,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:35,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:35,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013398394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:35,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:35,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:35,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927480648] [2021-06-05 14:48:35,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:35,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:35,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:35,997 INFO L87 Difference]: Start difference. First operand 1007 states and 3287 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:37,891 INFO L93 Difference]: Finished difference Result 1638 states and 5108 transitions. [2021-06-05 14:48:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 14:48:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:37,894 INFO L225 Difference]: With dead ends: 1638 [2021-06-05 14:48:37,894 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 14:48:37,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1273.1ms TimeCoverageRelationStatistics Valid=580, Invalid=4532, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 14:48:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 14:48:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 992. [2021-06-05 14:48:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.265388496468214) internal successors, (3236), 991 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3236 transitions. [2021-06-05 14:48:37,906 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3236 transitions. Word has length 25 [2021-06-05 14:48:37,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:37,906 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3236 transitions. [2021-06-05 14:48:37,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3236 transitions. [2021-06-05 14:48:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:37,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:37,908 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:38,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-06-05 14:48:38,108 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1917477296, now seen corresponding path program 387 times [2021-06-05 14:48:38,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:38,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41642294] [2021-06-05 14:48:38,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:38,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41642294] [2021-06-05 14:48:38,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41642294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:38,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467023989] [2021-06-05 14:48:38,193 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 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:38,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:48:38,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:38,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:38,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467023989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:38,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:38,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:38,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696134048] [2021-06-05 14:48:38,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:38,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:38,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:38,563 INFO L87 Difference]: Start difference. First operand 992 states and 3236 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:40,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:40,270 INFO L93 Difference]: Finished difference Result 1573 states and 4896 transitions. [2021-06-05 14:48:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 14:48:40,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:40,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:40,273 INFO L225 Difference]: With dead ends: 1573 [2021-06-05 14:48:40,273 INFO L226 Difference]: Without dead ends: 1521 [2021-06-05 14:48:40,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 997.4ms TimeCoverageRelationStatistics Valid=509, Invalid=4321, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 14:48:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-06-05 14:48:40,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 893. [2021-06-05 14:48:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.2208520179372195) internal successors, (2873), 892 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2873 transitions. [2021-06-05 14:48:40,284 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2873 transitions. Word has length 25 [2021-06-05 14:48:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:40,284 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 2873 transitions. [2021-06-05 14:48:40,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2873 transitions. [2021-06-05 14:48:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:40,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:40,285 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:40,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8669,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:40,485 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -458628254, now seen corresponding path program 388 times [2021-06-05 14:48:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749698621] [2021-06-05 14:48:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:40,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749698621] [2021-06-05 14:48:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749698621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559474426] [2021-06-05 14:48:40,569 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 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:40,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:40,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:40,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:40,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559474426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:40,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:40,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:40,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202294269] [2021-06-05 14:48:40,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:40,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:40,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:40,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:40,932 INFO L87 Difference]: Start difference. First operand 893 states and 2873 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:42,882 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2021-06-05 14:48:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 14:48:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:42,885 INFO L225 Difference]: With dead ends: 1474 [2021-06-05 14:48:42,885 INFO L226 Difference]: Without dead ends: 1353 [2021-06-05 14:48:42,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1164.5ms TimeCoverageRelationStatistics Valid=525, Invalid=5175, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 14:48:42,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-05 14:48:42,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 897. [2021-06-05 14:48:42,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.2154017857142856) internal successors, (2881), 896 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2881 transitions. [2021-06-05 14:48:42,898 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2881 transitions. Word has length 25 [2021-06-05 14:48:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:42,898 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2881 transitions. [2021-06-05 14:48:42,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2881 transitions. [2021-06-05 14:48:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:42,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:42,900 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:43,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8675 [2021-06-05 14:48:43,123 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1919174758, now seen corresponding path program 389 times [2021-06-05 14:48:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:43,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809130540] [2021-06-05 14:48:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:43,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809130540] [2021-06-05 14:48:43,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809130540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:43,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896118357] [2021-06-05 14:48:43,212 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 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:43,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:48:43,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:43,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:43,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:43,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896118357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:43,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:43,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:43,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836840186] [2021-06-05 14:48:43,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:43,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:43,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:43,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:43,576 INFO L87 Difference]: Start difference. First operand 897 states and 2881 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:46,041 INFO L93 Difference]: Finished difference Result 1790 states and 5503 transitions. [2021-06-05 14:48:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 14:48:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:46,044 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 14:48:46,044 INFO L226 Difference]: Without dead ends: 1712 [2021-06-05 14:48:46,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 1749.8ms TimeCoverageRelationStatistics Valid=782, Invalid=7408, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 14:48:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-05 14:48:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 938. [2021-06-05 14:48:46,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.2283884738527213) internal successors, (3025), 937 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3025 transitions. [2021-06-05 14:48:46,056 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3025 transitions. Word has length 25 [2021-06-05 14:48:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:46,056 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3025 transitions. [2021-06-05 14:48:46,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3025 transitions. [2021-06-05 14:48:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:46,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:46,057 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:46,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-06-05 14:48:46,257 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:46,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:46,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1190710558, now seen corresponding path program 390 times [2021-06-05 14:48:46,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:46,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723104874] [2021-06-05 14:48:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:46,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:46,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723104874] [2021-06-05 14:48:46,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723104874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:46,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513296883] [2021-06-05 14:48:46,352 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 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:46,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:48:46,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:46,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:46,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513296883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:46,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:46,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:46,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880275118] [2021-06-05 14:48:46,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:46,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:46,749 INFO L87 Difference]: Start difference. First operand 938 states and 3025 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:48,631 INFO L93 Difference]: Finished difference Result 1596 states and 4957 transitions. [2021-06-05 14:48:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 14:48:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:48,633 INFO L225 Difference]: With dead ends: 1596 [2021-06-05 14:48:48,633 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 14:48:48,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1181.4ms TimeCoverageRelationStatistics Valid=787, Invalid=6523, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 14:48:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 14:48:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 878. [2021-06-05 14:48:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.2052451539338653) internal successors, (2811), 877 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2811 transitions. [2021-06-05 14:48:48,645 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2811 transitions. Word has length 25 [2021-06-05 14:48:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:48,645 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2811 transitions. [2021-06-05 14:48:48,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2811 transitions. [2021-06-05 14:48:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:48,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:48,646 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:48,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8697 [2021-06-05 14:48:48,847 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash 646241050, now seen corresponding path program 391 times [2021-06-05 14:48:48,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:48,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516025163] [2021-06-05 14:48:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:48,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:48,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516025163] [2021-06-05 14:48:48,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516025163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:48,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124479000] [2021-06-05 14:48:48,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:49,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124479000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:49,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:49,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:49,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128727894] [2021-06-05 14:48:49,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:49,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:49,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:49,446 INFO L87 Difference]: Start difference. First operand 878 states and 2811 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:52,004 INFO L93 Difference]: Finished difference Result 1955 states and 5962 transitions. [2021-06-05 14:48:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 14:48:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:52,006 INFO L225 Difference]: With dead ends: 1955 [2021-06-05 14:48:52,007 INFO L226 Difference]: Without dead ends: 1877 [2021-06-05 14:48:52,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1708.3ms TimeCoverageRelationStatistics Valid=707, Invalid=6775, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 14:48:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-05 14:48:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 947. [2021-06-05 14:48:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2389006342494713) internal successors, (3064), 946 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3064 transitions. [2021-06-05 14:48:52,019 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3064 transitions. Word has length 25 [2021-06-05 14:48:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:52,019 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3064 transitions. [2021-06-05 14:48:52,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3064 transitions. [2021-06-05 14:48:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:52,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:52,020 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:52,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8714,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:52,221 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1831323030, now seen corresponding path program 392 times [2021-06-05 14:48:52,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:52,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913695083] [2021-06-05 14:48:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:52,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913695083] [2021-06-05 14:48:52,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913695083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:52,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493891422] [2021-06-05 14:48:52,309 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 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:52,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:52,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:52,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:52,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:52,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493891422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:52,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:52,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:52,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333452695] [2021-06-05 14:48:52,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:52,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:52,782 INFO L87 Difference]: Start difference. First operand 947 states and 3064 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:55,049 INFO L93 Difference]: Finished difference Result 2050 states and 6284 transitions. [2021-06-05 14:48:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 14:48:55,049 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:55,052 INFO L225 Difference]: With dead ends: 2050 [2021-06-05 14:48:55,052 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 14:48:55,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 1546.3ms TimeCoverageRelationStatistics Valid=912, Invalid=8018, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 14:48:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 14:48:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 934. [2021-06-05 14:48:55,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2368703108252945) internal successors, (3020), 933 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3020 transitions. [2021-06-05 14:48:55,066 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3020 transitions. Word has length 25 [2021-06-05 14:48:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:55,066 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3020 transitions. [2021-06-05 14:48:55,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3020 transitions. [2021-06-05 14:48:55,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:55,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:55,067 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:55,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8767,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:55,267 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:55,267 INFO L82 PathProgramCache]: Analyzing trace with hash -703591326, now seen corresponding path program 393 times [2021-06-05 14:48:55,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:55,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195938774] [2021-06-05 14:48:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:55,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:55,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195938774] [2021-06-05 14:48:55,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195938774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:55,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665720685] [2021-06-05 14:48:55,350 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 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:55,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:48:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:55,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665720685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:55,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:55,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:55,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228185205] [2021-06-05 14:48:55,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:55,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:55,723 INFO L87 Difference]: Start difference. First operand 934 states and 3020 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:57,837 INFO L93 Difference]: Finished difference Result 1714 states and 5308 transitions. [2021-06-05 14:48:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 14:48:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:48:57,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:57,840 INFO L225 Difference]: With dead ends: 1714 [2021-06-05 14:48:57,840 INFO L226 Difference]: Without dead ends: 1662 [2021-06-05 14:48:57,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1159.0ms TimeCoverageRelationStatistics Valid=646, Invalid=6160, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 14:48:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-06-05 14:48:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 862. [2021-06-05 14:48:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.2009291521486642) internal successors, (2756), 861 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2756 transitions. [2021-06-05 14:48:57,851 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2756 transitions. Word has length 25 [2021-06-05 14:48:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:57,851 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2756 transitions. [2021-06-05 14:48:57,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:48:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2756 transitions. [2021-06-05 14:48:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:48:57,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:57,852 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:58,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8809,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:58,053 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash -159998234, now seen corresponding path program 394 times [2021-06-05 14:48:58,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:58,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89358274] [2021-06-05 14:48:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:58,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:58,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89358274] [2021-06-05 14:48:58,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89358274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:58,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172676878] [2021-06-05 14:48:58,141 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 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:58,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:58,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:58,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:48:58,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:58,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172676878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:58,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:58,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:48:58,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341810530] [2021-06-05 14:48:58,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:48:58,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:58,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:48:58,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:58,756 INFO L87 Difference]: Start difference. First operand 862 states and 2756 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:00,651 INFO L93 Difference]: Finished difference Result 1736 states and 5285 transitions. [2021-06-05 14:49:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:49:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:00,653 INFO L225 Difference]: With dead ends: 1736 [2021-06-05 14:49:00,653 INFO L226 Difference]: Without dead ends: 1658 [2021-06-05 14:49:00,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1171.9ms TimeCoverageRelationStatistics Valid=505, Invalid=4751, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:49:00,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-06-05 14:49:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 959. [2021-06-05 14:49:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.2526096033402925) internal successors, (3116), 958 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3116 transitions. [2021-06-05 14:49:00,665 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3116 transitions. Word has length 25 [2021-06-05 14:49:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:00,665 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3116 transitions. [2021-06-05 14:49:00,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:00,666 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3116 transitions. [2021-06-05 14:49:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:00,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:00,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:00,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8815,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:00,867 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1025083746, now seen corresponding path program 395 times [2021-06-05 14:49:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:00,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064114486] [2021-06-05 14:49:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:00,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064114486] [2021-06-05 14:49:00,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064114486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:00,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570529843] [2021-06-05 14:49:00,981 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 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:01,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:49:01,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:01,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:49:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:01,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570529843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:01,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:01,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:49:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201946106] [2021-06-05 14:49:01,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:49:01,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:49:01,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:01,576 INFO L87 Difference]: Start difference. First operand 959 states and 3116 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:03,340 INFO L93 Difference]: Finished difference Result 1641 states and 5003 transitions. [2021-06-05 14:49:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 14:49:03,340 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:03,342 INFO L225 Difference]: With dead ends: 1641 [2021-06-05 14:49:03,342 INFO L226 Difference]: Without dead ends: 1589 [2021-06-05 14:49:03,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1035.8ms TimeCoverageRelationStatistics Valid=557, Invalid=4413, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 14:49:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-05 14:49:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 946. [2021-06-05 14:49:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.250793650793651) internal successors, (3072), 945 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3072 transitions. [2021-06-05 14:49:03,365 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3072 transitions. Word has length 25 [2021-06-05 14:49:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:03,365 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3072 transitions. [2021-06-05 14:49:03,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3072 transitions. [2021-06-05 14:49:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:03,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:03,366 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:03,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8874 [2021-06-05 14:49:03,567 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1509830610, now seen corresponding path program 396 times [2021-06-05 14:49:03,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:03,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933689302] [2021-06-05 14:49:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:03,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:03,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933689302] [2021-06-05 14:49:03,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933689302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:03,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710908725] [2021-06-05 14:49:03,656 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 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:03,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:49:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:49:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:04,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710908725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:04,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:04,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:49:04,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598306379] [2021-06-05 14:49:04,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:49:04,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:04,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:49:04,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:04,069 INFO L87 Difference]: Start difference. First operand 946 states and 3072 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:05,862 INFO L93 Difference]: Finished difference Result 1571 states and 4874 transitions. [2021-06-05 14:49:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 14:49:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:05,864 INFO L225 Difference]: With dead ends: 1571 [2021-06-05 14:49:05,864 INFO L226 Difference]: Without dead ends: 1519 [2021-06-05 14:49:05,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 14:49:05,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-05 14:49:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 931. [2021-06-05 14:49:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.2483870967741937) internal successors, (3021), 930 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3021 transitions. [2021-06-05 14:49:05,876 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3021 transitions. Word has length 25 [2021-06-05 14:49:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:05,876 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3021 transitions. [2021-06-05 14:49:05,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:05,876 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3021 transitions. [2021-06-05 14:49:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:05,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:05,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:06,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:06,078 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:06,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1512202978, now seen corresponding path program 397 times [2021-06-05 14:49:06,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:06,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158867629] [2021-06-05 14:49:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:06,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:06,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158867629] [2021-06-05 14:49:06,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158867629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:06,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156591549] [2021-06-05 14:49:06,174 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 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:06,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:49:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156591549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:06,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:06,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:49:06,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900662995] [2021-06-05 14:49:06,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:49:06,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:06,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:49:06,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:06,543 INFO L87 Difference]: Start difference. First operand 931 states and 3021 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:08,155 INFO L93 Difference]: Finished difference Result 1506 states and 4662 transitions. [2021-06-05 14:49:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 14:49:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:08,157 INFO L225 Difference]: With dead ends: 1506 [2021-06-05 14:49:08,157 INFO L226 Difference]: Without dead ends: 1454 [2021-06-05 14:49:08,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1001.9ms TimeCoverageRelationStatistics Valid=512, Invalid=4600, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 14:49:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-05 14:49:08,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 845. [2021-06-05 14:49:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2002369668246446) internal successors, (2701), 844 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2701 transitions. [2021-06-05 14:49:08,168 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2701 transitions. Word has length 25 [2021-06-05 14:49:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:08,168 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2701 transitions. [2021-06-05 14:49:08,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2701 transitions. [2021-06-05 14:49:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:08,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:08,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:08,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8939 [2021-06-05 14:49:08,370 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1142902924, now seen corresponding path program 398 times [2021-06-05 14:49:08,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:08,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616997240] [2021-06-05 14:49:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:08,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616997240] [2021-06-05 14:49:08,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616997240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:08,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982162313] [2021-06-05 14:49:08,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:08,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:49:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:09,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982162313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:09,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:09,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:49:09,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221556331] [2021-06-05 14:49:09,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:49:09,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:49:09,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:09,082 INFO L87 Difference]: Start difference. First operand 845 states and 2701 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:11,459 INFO L93 Difference]: Finished difference Result 1597 states and 4791 transitions. [2021-06-05 14:49:11,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 14:49:11,460 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:11,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:11,462 INFO L225 Difference]: With dead ends: 1597 [2021-06-05 14:49:11,462 INFO L226 Difference]: Without dead ends: 1519 [2021-06-05 14:49:11,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1460.1ms TimeCoverageRelationStatistics Valid=605, Invalid=5401, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 14:49:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-05 14:49:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 878. [2021-06-05 14:49:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.1904218928164196) internal successors, (2798), 877 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2798 transitions. [2021-06-05 14:49:11,475 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2798 transitions. Word has length 25 [2021-06-05 14:49:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:11,475 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2798 transitions. [2021-06-05 14:49:11,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2798 transitions. [2021-06-05 14:49:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:11,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:11,476 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:11,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8945,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:11,676 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:11,676 INFO L82 PathProgramCache]: Analyzing trace with hash 42179056, now seen corresponding path program 399 times [2021-06-05 14:49:11,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:11,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104594161] [2021-06-05 14:49:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:11,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:11,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104594161] [2021-06-05 14:49:11,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104594161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:11,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888081994] [2021-06-05 14:49:11,766 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 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:11,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:49:11,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:11,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 14:49:11,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:12,005 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 3 treesize of output 1 [2021-06-05 14:49:12,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,073 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-06-05 14:49:12,076 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 3 treesize of output 1 [2021-06-05 14:49:12,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-05 14:49:12,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,134 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-05 14:49:12,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-05 14:49:12,137 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:48 [2021-06-05 14:49:12,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,614 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 8 treesize of output 1 [2021-06-05 14:49:12,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,618 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 9 treesize of output 2 [2021-06-05 14:49:12,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,635 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 9 treesize of output 2 [2021-06-05 14:49:12,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:49:12,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:12,644 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 8 treesize of output 1 [2021-06-05 14:49:12,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,772 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 14:49:12,773 INFO L628 ElimStorePlain]: treesize reduction 140, result has 46.6 percent of original size [2021-06-05 14:49:12,776 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 4 treesize of output 2 [2021-06-05 14:49:12,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,779 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 4 treesize of output 2 [2021-06-05 14:49:12,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:12,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:12,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 14:49:12,835 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:368, output treesize:78 [2021-06-05 14:49:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:49:12,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888081994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:12,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:12,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 14:49:12,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648625717] [2021-06-05 14:49:12,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:12,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:12,998 INFO L87 Difference]: Start difference. First operand 878 states and 2798 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:15,793 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 14:49:16,465 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 14:49:16,777 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-05 14:49:17,011 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-06-05 14:49:17,190 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 14:49:17,725 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 14:49:17,938 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 14:49:18,179 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-05 14:49:18,431 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-05 14:49:18,649 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-06-05 14:49:18,825 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-06-05 14:49:19,066 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-05 14:49:19,622 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 14:49:19,874 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-05 14:49:20,037 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 14:49:20,231 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 14:49:20,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-05 14:49:20,659 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-06-05 14:49:20,807 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 14:49:21,119 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-06-05 14:49:21,427 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 14:49:21,581 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 14:49:21,775 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 14:49:22,135 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-05 14:49:22,437 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-05 14:49:22,677 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-05 14:49:22,873 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 14:49:23,191 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 14:49:23,580 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 14:49:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:23,608 INFO L93 Difference]: Finished difference Result 2145 states and 6267 transitions. [2021-06-05 14:49:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-05 14:49:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:49:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:23,611 INFO L225 Difference]: With dead ends: 2145 [2021-06-05 14:49:23,611 INFO L226 Difference]: Without dead ends: 1823 [2021-06-05 14:49:23,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7443 ImplicationChecksByTransitivity, 9049.7ms TimeCoverageRelationStatistics Valid=1818, Invalid=19062, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 14:49:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-06-05 14:49:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1016. [2021-06-05 14:49:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2) internal successors, (3248), 1015 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3248 transitions. [2021-06-05 14:49:23,625 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3248 transitions. Word has length 25 [2021-06-05 14:49:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:23,625 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 3248 transitions. [2021-06-05 14:49:23,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3248 transitions. [2021-06-05 14:49:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:23,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:23,626 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:23,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9050,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:23,826 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash 853194326, now seen corresponding path program 400 times [2021-06-05 14:49:23,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:23,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959566163] [2021-06-05 14:49:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:49:23,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:23,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959566163] [2021-06-05 14:49:23,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959566163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:23,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255402333] [2021-06-05 14:49:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:24,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:24,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:49:24,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:24,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:24,427 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 8 treesize of output 1 [2021-06-05 14:49:24,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,431 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 3 treesize of output 1 [2021-06-05 14:49:24,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,562 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 14:49:24,562 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-05 14:49:24,566 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 4 treesize of output 2 [2021-06-05 14:49:24,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,570 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 4 treesize of output 2 [2021-06-05 14:49:24,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:24,633 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 4 treesize of output 2 [2021-06-05 14:49:24,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,636 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 4 treesize of output 2 [2021-06-05 14:49:24,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:24,696 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 3 treesize of output 1 [2021-06-05 14:49:24,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:24,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:24,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:49:24,755 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:49:25,009 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 4 treesize of output 2 [2021-06-05 14:49:25,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:25,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:25,013 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 9 treesize of output 2 [2021-06-05 14:49:25,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:25,049 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-05 14:49:25,051 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 3 treesize of output 1 [2021-06-05 14:49:25,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:25,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:25,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:49:25,064 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 14:49:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:25,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255402333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:25,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:25,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:49:25,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426787636] [2021-06-05 14:49:25,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:25,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:25,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:25,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:25,120 INFO L87 Difference]: Start difference. First operand 1016 states and 3248 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:25,933 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 14:49:26,069 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 14:49:26,339 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:49:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:27,795 INFO L93 Difference]: Finished difference Result 1770 states and 5324 transitions. [2021-06-05 14:49:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:49:27,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:49:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:27,797 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 14:49:27,797 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 14:49:27,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2538.5ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:49:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 14:49:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1027. [2021-06-05 14:49:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.211500974658869) internal successors, (3295), 1026 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3295 transitions. [2021-06-05 14:49:27,809 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3295 transitions. Word has length 25 [2021-06-05 14:49:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:27,809 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3295 transitions. [2021-06-05 14:49:27,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3295 transitions. [2021-06-05 14:49:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:27,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:27,810 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:28,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9150 [2021-06-05 14:49:28,011 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:28,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:28,011 INFO L82 PathProgramCache]: Analyzing trace with hash 561294408, now seen corresponding path program 401 times [2021-06-05 14:49:28,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:28,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645236119] [2021-06-05 14:49:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:49:28,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645236119] [2021-06-05 14:49:28,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645236119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339883912] [2021-06-05 14:49:28,098 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 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:28,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:49:28,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:28,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:49:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:28,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:28,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:28,539 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:49:28,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:28,543 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 3 treesize of output 1 [2021-06-05 14:49:28,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:28,678 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 14:49:28,678 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-05 14:49:28,681 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 3 treesize of output 1 [2021-06-05 14:49:28,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:28,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:28,747 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 4 treesize of output 2 [2021-06-05 14:49:28,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:28,751 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 4 treesize of output 2 [2021-06-05 14:49:28,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:28,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:28,813 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 4 treesize of output 2 [2021-06-05 14:49:28,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:28,817 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 4 treesize of output 2 [2021-06-05 14:49:28,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:28,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:28,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:49:28,877 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:49:29,153 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 4 treesize of output 2 [2021-06-05 14:49:29,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:29,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:29,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,242 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-05 14:49:29,245 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 3 treesize of output 1 [2021-06-05 14:49:29,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:29,277 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 3 treesize of output 1 [2021-06-05 14:49:29,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:29,308 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 4 treesize of output 2 [2021-06-05 14:49:29,308 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:29,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:29,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:29,335 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 14:49:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:29,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339883912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:29,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:29,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:49:29,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639872207] [2021-06-05 14:49:29,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:29,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:29,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:29,421 INFO L87 Difference]: Start difference. First operand 1027 states and 3295 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:30,405 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 14:49:30,541 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 14:49:30,749 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-05 14:49:30,896 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 14:49:31,041 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-05 14:49:31,190 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 14:49:31,365 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-06-05 14:49:31,514 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-06-05 14:49:31,663 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 14:49:31,815 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 14:49:32,020 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 14:49:32,174 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 14:49:32,368 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 14:49:32,528 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-05 14:49:32,734 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-05 14:49:32,877 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 14:49:33,053 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 14:49:33,202 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 14:49:33,391 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-05 14:49:33,693 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-05 14:49:33,839 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-05 14:49:34,042 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-05 14:49:34,203 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-05 14:49:34,663 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2021-06-05 14:49:34,810 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-05 14:49:35,007 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-06-05 14:49:35,143 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-06-05 14:49:35,652 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-06-05 14:49:35,804 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-05 14:49:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:35,892 INFO L93 Difference]: Finished difference Result 1975 states and 5843 transitions. [2021-06-05 14:49:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:49:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:49:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:35,895 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 14:49:35,895 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 14:49:35,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5951.9ms TimeCoverageRelationStatistics Valid=692, Invalid=3730, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 14:49:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 14:49:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1017. [2021-06-05 14:49:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.2096456692913384) internal successors, (3261), 1016 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3261 transitions. [2021-06-05 14:49:35,908 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3261 transitions. Word has length 25 [2021-06-05 14:49:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:35,908 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3261 transitions. [2021-06-05 14:49:35,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3261 transitions. [2021-06-05 14:49:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:35,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:35,909 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:36,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9178,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:36,109 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1910473976, now seen corresponding path program 402 times [2021-06-05 14:49:36,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:36,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593996797] [2021-06-05 14:49:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:49:36,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593996797] [2021-06-05 14:49:36,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593996797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327643112] [2021-06-05 14:49:36,189 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 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:36,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:49:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:36,679 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 4 treesize of output 2 [2021-06-05 14:49:36,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:36,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:36,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:49:36,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:36,799 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 14:49:36,800 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-06-05 14:49:36,802 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 3 treesize of output 1 [2021-06-05 14:49:36,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:36,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:36,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 14:49:36,858 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 14:49:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:37,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327643112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:37,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:37,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:49:37,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738213697] [2021-06-05 14:49:37,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:37,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:37,045 INFO L87 Difference]: Start difference. First operand 1017 states and 3261 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,069 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 14:49:38,400 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-06-05 14:49:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:38,685 INFO L93 Difference]: Finished difference Result 1594 states and 4846 transitions. [2021-06-05 14:49:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:49:38,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:49:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:38,687 INFO L225 Difference]: With dead ends: 1594 [2021-06-05 14:49:38,687 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 14:49:38,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1634.6ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:49:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 14:49:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1015. [2021-06-05 14:49:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.201183431952663) internal successors, (3246), 1014 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3246 transitions. [2021-06-05 14:49:38,708 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3246 transitions. Word has length 25 [2021-06-05 14:49:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:38,708 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3246 transitions. [2021-06-05 14:49:38,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3246 transitions. [2021-06-05 14:49:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:38,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:38,709 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:38,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9216 [2021-06-05 14:49:38,909 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:38,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1516618744, now seen corresponding path program 403 times [2021-06-05 14:49:38,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:38,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77015976] [2021-06-05 14:49:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:49:38,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77015976] [2021-06-05 14:49:38,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77015976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:38,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114081141] [2021-06-05 14:49:38,986 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 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:49:39,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:39,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:39,440 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 8 treesize of output 1 [2021-06-05 14:49:39,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,443 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 3 treesize of output 1 [2021-06-05 14:49:39,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,555 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 14:49:39,555 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-06-05 14:49:39,558 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 4 treesize of output 2 [2021-06-05 14:49:39,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,562 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 4 treesize of output 2 [2021-06-05 14:49:39,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:39,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:39,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 14:49:39,616 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 14:49:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:39,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114081141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:39,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:39,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:49:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787198795] [2021-06-05 14:49:39,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:39,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:39,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:39,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:39,824 INFO L87 Difference]: Start difference. First operand 1015 states and 3246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:41,506 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 14:49:41,663 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-05 14:49:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:42,104 INFO L93 Difference]: Finished difference Result 1442 states and 4403 transitions. [2021-06-05 14:49:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:49:42,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:49:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:42,106 INFO L225 Difference]: With dead ends: 1442 [2021-06-05 14:49:42,106 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 14:49:42,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2180.7ms TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:49:42,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 14:49:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1015. [2021-06-05 14:49:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.193293885601578) internal successors, (3238), 1014 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3238 transitions. [2021-06-05 14:49:42,117 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3238 transitions. Word has length 25 [2021-06-05 14:49:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:42,117 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3238 transitions. [2021-06-05 14:49:42,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3238 transitions. [2021-06-05 14:49:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:42,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:42,118 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:42,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9236 [2021-06-05 14:49:42,318 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:42,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:42,319 INFO L82 PathProgramCache]: Analyzing trace with hash 772965990, now seen corresponding path program 404 times [2021-06-05 14:49:42,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:42,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683616097] [2021-06-05 14:49:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:42,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:42,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683616097] [2021-06-05 14:49:42,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683616097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:42,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578886545] [2021-06-05 14:49:42,403 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 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:42,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:42,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:42,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:49:42,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:42,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578886545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:42,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:42,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:49:42,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308661528] [2021-06-05 14:49:42,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:49:42,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:49:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:42,851 INFO L87 Difference]: Start difference. First operand 1015 states and 3238 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:44,993 INFO L93 Difference]: Finished difference Result 1664 states and 5107 transitions. [2021-06-05 14:49:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 14:49:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:44,995 INFO L225 Difference]: With dead ends: 1664 [2021-06-05 14:49:44,996 INFO L226 Difference]: Without dead ends: 1584 [2021-06-05 14:49:44,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1229.1ms TimeCoverageRelationStatistics Valid=501, Invalid=4329, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 14:49:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-05 14:49:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 996. [2021-06-05 14:49:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.191959798994975) internal successors, (3176), 995 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3176 transitions. [2021-06-05 14:49:45,008 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3176 transitions. Word has length 25 [2021-06-05 14:49:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:45,008 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3176 transitions. [2021-06-05 14:49:45,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3176 transitions. [2021-06-05 14:49:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:45,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:45,009 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:45,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9259 [2021-06-05 14:49:45,210 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:45,210 INFO L82 PathProgramCache]: Analyzing trace with hash -499967718, now seen corresponding path program 405 times [2021-06-05 14:49:45,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:45,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143067676] [2021-06-05 14:49:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:45,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:45,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143067676] [2021-06-05 14:49:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143067676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:45,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541919582] [2021-06-05 14:49:45,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:45,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:49:45,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:45,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:49:45,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:45,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541919582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:45,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:45,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:49:45,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317087130] [2021-06-05 14:49:45,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:49:45,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:49:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:45,741 INFO L87 Difference]: Start difference. First operand 996 states and 3176 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:47,788 INFO L93 Difference]: Finished difference Result 1708 states and 5268 transitions. [2021-06-05 14:49:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 14:49:47,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:47,790 INFO L225 Difference]: With dead ends: 1708 [2021-06-05 14:49:47,791 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 14:49:47,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1315.1ms TimeCoverageRelationStatistics Valid=555, Invalid=4415, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 14:49:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 14:49:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 972. [2021-06-05 14:49:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.194644696189495) internal successors, (3102), 971 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3102 transitions. [2021-06-05 14:49:47,803 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3102 transitions. Word has length 25 [2021-06-05 14:49:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:47,803 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3102 transitions. [2021-06-05 14:49:47,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3102 transitions. [2021-06-05 14:49:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:47,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:47,804 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:48,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9266 [2021-06-05 14:49:48,004 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:48,005 INFO L82 PathProgramCache]: Analyzing trace with hash 438157004, now seen corresponding path program 406 times [2021-06-05 14:49:48,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:48,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696333572] [2021-06-05 14:49:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:48,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:48,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696333572] [2021-06-05 14:49:48,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696333572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:48,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679390717] [2021-06-05 14:49:48,085 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 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:48,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:48,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 14:49:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:48,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679390717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:48,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:48,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 14:49:48,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371663585] [2021-06-05 14:49:48,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:49:48,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:48,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:49:48,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:49:48,513 INFO L87 Difference]: Start difference. First operand 972 states and 3102 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:50,409 INFO L93 Difference]: Finished difference Result 1607 states and 4889 transitions. [2021-06-05 14:49:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 14:49:50,410 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 25 [2021-06-05 14:49:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:50,412 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 14:49:50,412 INFO L226 Difference]: Without dead ends: 1527 [2021-06-05 14:49:50,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 1116.9ms TimeCoverageRelationStatistics Valid=589, Invalid=4667, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:49:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-06-05 14:49:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 850. [2021-06-05 14:49:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.1590106007067136) internal successors, (2682), 849 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:50,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2682 transitions. [2021-06-05 14:49:50,422 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2682 transitions. Word has length 25 [2021-06-05 14:49:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:50,422 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2682 transitions. [2021-06-05 14:49:50,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-06-05 14:49:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2682 transitions. [2021-06-05 14:49:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:50,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:50,423 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9273,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:50,624 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash -291107904, now seen corresponding path program 407 times [2021-06-05 14:49:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:50,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594205047] [2021-06-05 14:49:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:49:50,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:50,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594205047] [2021-06-05 14:49:50,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594205047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:50,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163341397] [2021-06-05 14:49:50,708 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:50,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:49:50,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:50,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:49:50,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:51,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:51,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:51,139 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 8 treesize of output 1 [2021-06-05 14:49:51,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:51,143 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 3 treesize of output 1 [2021-06-05 14:49:51,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:51,277 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 14:49:51,278 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 14:49:51,281 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 3 treesize of output 1 [2021-06-05 14:49:51,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:51,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:51,347 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 4 treesize of output 2 [2021-06-05 14:49:51,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:51,351 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 4 treesize of output 2 [2021-06-05 14:49:51,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:51,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:51,423 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 4 treesize of output 2 [2021-06-05 14:49:51,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:51,427 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 4 treesize of output 2 [2021-06-05 14:49:51,428 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:51,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:51,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:49:51,486 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:49:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:51,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163341397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:51,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:51,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 14:49:51,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402456856] [2021-06-05 14:49:51,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:49:51,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:51,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:49:51,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:49:51,726 INFO L87 Difference]: Start difference. First operand 850 states and 2682 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:53,143 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-06-05 14:49:53,707 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-06-05 14:49:54,282 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-06-05 14:49:54,844 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2021-06-05 14:49:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:55,558 INFO L93 Difference]: Finished difference Result 1778 states and 5323 transitions. [2021-06-05 14:49:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:49:55,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:49:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:55,560 INFO L225 Difference]: With dead ends: 1778 [2021-06-05 14:49:55,560 INFO L226 Difference]: Without dead ends: 1438 [2021-06-05 14:49:55,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3624.3ms TimeCoverageRelationStatistics Valid=539, Invalid=2653, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 14:49:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-05 14:49:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 848. [2021-06-05 14:49:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.1499409681227863) internal successors, (2668), 847 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:55,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2668 transitions. [2021-06-05 14:49:55,570 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2668 transitions. Word has length 25 [2021-06-05 14:49:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:55,570 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2668 transitions. [2021-06-05 14:49:55,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2668 transitions. [2021-06-05 14:49:55,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:55,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:55,571 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:55,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9280,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:55,771 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1194779832, now seen corresponding path program 408 times [2021-06-05 14:49:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:55,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118044433] [2021-06-05 14:49:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:49:55,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:55,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118044433] [2021-06-05 14:49:55,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118044433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:55,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325935187] [2021-06-05 14:49:55,856 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 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:55,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:49:55,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:55,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:49:55,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:56,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:56,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:56,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:49:56,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,189 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 3 treesize of output 1 [2021-06-05 14:49:56,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,323 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 14:49:56,324 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 14:49:56,328 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 4 treesize of output 2 [2021-06-05 14:49:56,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,332 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 4 treesize of output 2 [2021-06-05 14:49:56,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:56,398 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 4 treesize of output 2 [2021-06-05 14:49:56,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,401 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 4 treesize of output 2 [2021-06-05 14:49:56,402 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:56,461 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 3 treesize of output 1 [2021-06-05 14:49:56,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:56,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:49:56,518 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:49:56,787 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 3 treesize of output 1 [2021-06-05 14:49:56,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:56,791 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 8 treesize of output 1 [2021-06-05 14:49:56,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,824 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-06-05 14:49:56,826 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 4 treesize of output 2 [2021-06-05 14:49:56,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:56,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:56,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:49:56,840 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 14:49:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:56,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325935187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:56,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:56,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:49:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152072005] [2021-06-05 14:49:56,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:56,894 INFO L87 Difference]: Start difference. First operand 848 states and 2668 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:58,074 INFO L93 Difference]: Finished difference Result 1451 states and 4422 transitions. [2021-06-05 14:49:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:49:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:49:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:58,076 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 14:49:58,076 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 14:49:58,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1104.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:49:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 14:49:58,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 828. [2021-06-05 14:49:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.1499395405078596) internal successors, (2605), 827 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2605 transitions. [2021-06-05 14:49:58,087 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2605 transitions. Word has length 25 [2021-06-05 14:49:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:58,087 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2605 transitions. [2021-06-05 14:49:58,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2605 transitions. [2021-06-05 14:49:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:49:58,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:58,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:58,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9304 [2021-06-05 14:49:58,289 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 902879914, now seen corresponding path program 409 times [2021-06-05 14:49:58,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:58,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337974335] [2021-06-05 14:49:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:49:58,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337974335] [2021-06-05 14:49:58,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337974335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740722534] [2021-06-05 14:49:58,370 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 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:58,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:49:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:58,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:58,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:58,694 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 9 treesize of output 2 [2021-06-05 14:49:58,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:58,698 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 4 treesize of output 2 [2021-06-05 14:49:58,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:58,837 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-05 14:49:58,837 INFO L628 ElimStorePlain]: treesize reduction 59, result has 68.4 percent of original size [2021-06-05 14:49:58,840 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 3 treesize of output 1 [2021-06-05 14:49:58,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:58,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:58,902 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 3 treesize of output 1 [2021-06-05 14:49:58,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:58,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:58,963 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 4 treesize of output 2 [2021-06-05 14:49:58,964 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:58,967 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 4 treesize of output 2 [2021-06-05 14:49:58,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:59,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:49:59,035 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:49:59,313 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 3 treesize of output 1 [2021-06-05 14:49:59,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:49:59,318 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 8 treesize of output 1 [2021-06-05 14:49:59,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,396 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-06-05 14:49:59,400 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 4 treesize of output 2 [2021-06-05 14:49:59,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:59,432 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 3 treesize of output 1 [2021-06-05 14:49:59,433 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:59,463 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 4 treesize of output 2 [2021-06-05 14:49:59,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:49:59,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:49:59,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:49:59,491 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 14:49:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:59,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740722534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:59,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:59,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:49:59,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713964517] [2021-06-05 14:49:59,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:49:59,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:49:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:49:59,578 INFO L87 Difference]: Start difference. First operand 828 states and 2605 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:02,019 INFO L93 Difference]: Finished difference Result 1421 states and 4208 transitions. [2021-06-05 14:50:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:50:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:50:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:02,021 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 14:50:02,021 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 14:50:02,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2170.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1620, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:50:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 14:50:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 836. [2021-06-05 14:50:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.1580838323353295) internal successors, (2637), 835 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2637 transitions. [2021-06-05 14:50:02,030 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2637 transitions. Word has length 25 [2021-06-05 14:50:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:02,030 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2637 transitions. [2021-06-05 14:50:02,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2637 transitions. [2021-06-05 14:50:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:50:02,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:02,031 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:02,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9337 [2021-06-05 14:50:02,232 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1605652284, now seen corresponding path program 410 times [2021-06-05 14:50:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:02,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188623077] [2021-06-05 14:50:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:50:02,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188623077] [2021-06-05 14:50:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188623077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725306586] [2021-06-05 14:50:02,310 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 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:02,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:02,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:02,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:50:02,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:02,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:02,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:02,721 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 9 treesize of output 2 [2021-06-05 14:50:02,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:02,725 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 4 treesize of output 2 [2021-06-05 14:50:02,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:02,841 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-05 14:50:02,841 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-06-05 14:50:02,844 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 3 treesize of output 1 [2021-06-05 14:50:02,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:02,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:02,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 14:50:02,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 14:50:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:03,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725306586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:03,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:03,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:50:03,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195934825] [2021-06-05 14:50:03,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:50:03,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:03,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:50:03,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:03,103 INFO L87 Difference]: Start difference. First operand 836 states and 2637 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:04,877 INFO L93 Difference]: Finished difference Result 1196 states and 3596 transitions. [2021-06-05 14:50:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:50:04,877 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:50:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:04,878 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 14:50:04,878 INFO L226 Difference]: Without dead ends: 1046 [2021-06-05 14:50:04,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1697.5ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:50:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-06-05 14:50:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 826. [2021-06-05 14:50:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.1515151515151514) internal successors, (2600), 825 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2600 transitions. [2021-06-05 14:50:04,887 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2600 transitions. Word has length 25 [2021-06-05 14:50:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:04,887 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2600 transitions. [2021-06-05 14:50:04,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2600 transitions. [2021-06-05 14:50:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:50:04,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:04,888 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:05,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9374 [2021-06-05 14:50:05,089 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:05,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1175033238, now seen corresponding path program 411 times [2021-06-05 14:50:05,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:05,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835636788] [2021-06-05 14:50:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:50:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835636788] [2021-06-05 14:50:05,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835636788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233180520] [2021-06-05 14:50:05,162 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 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:05,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:05,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:50:05,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:05,531 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 3 treesize of output 1 [2021-06-05 14:50:05,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:05,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:05,535 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 8 treesize of output 1 [2021-06-05 14:50:05,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:05,650 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 14:50:05,651 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-06-05 14:50:05,654 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 4 treesize of output 2 [2021-06-05 14:50:05,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:05,657 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 4 treesize of output 2 [2021-06-05 14:50:05,658 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:05,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:05,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 14:50:05,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-05 14:50:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:05,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233180520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:05,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:05,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 14:50:05,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551663060] [2021-06-05 14:50:05,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:50:05,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:05,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:50:05,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:05,917 INFO L87 Difference]: Start difference. First operand 826 states and 2600 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:07,115 INFO L93 Difference]: Finished difference Result 1043 states and 3193 transitions. [2021-06-05 14:50:07,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:50:07,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:50:07,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:07,116 INFO L225 Difference]: With dead ends: 1043 [2021-06-05 14:50:07,116 INFO L226 Difference]: Without dead ends: 894 [2021-06-05 14:50:07,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1157.4ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:50:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-06-05 14:50:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 803. [2021-06-05 14:50:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.1546134663341645) internal successors, (2530), 802 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2530 transitions. [2021-06-05 14:50:07,124 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2530 transitions. Word has length 25 [2021-06-05 14:50:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:07,124 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2530 transitions. [2021-06-05 14:50:07,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2530 transitions. [2021-06-05 14:50:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:50:07,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:07,125 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:07,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9395,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:07,325 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:07,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:07,326 INFO L82 PathProgramCache]: Analyzing trace with hash -171956220, now seen corresponding path program 412 times [2021-06-05 14:50:07,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:07,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805842368] [2021-06-05 14:50:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:50:07,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805842368] [2021-06-05 14:50:07,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805842368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:07,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485674214] [2021-06-05 14:50:07,424 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 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:07,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:07,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:50:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:07,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:07,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:07,685 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 9 treesize of output 2 [2021-06-05 14:50:07,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,689 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 4 treesize of output 2 [2021-06-05 14:50:07,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,791 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-06-05 14:50:07,791 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.7 percent of original size [2021-06-05 14:50:07,794 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 3 treesize of output 1 [2021-06-05 14:50:07,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:07,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-05 14:50:07,843 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:134, output treesize:85 [2021-06-05 14:50:08,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:08,078 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 9 treesize of output 2 [2021-06-05 14:50:08,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,112 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-06-05 14:50:08,114 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 3 treesize of output 1 [2021-06-05 14:50:08,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:08,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:08,128 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 14:50:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:08,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485674214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:08,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:08,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 14:50:08,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580601466] [2021-06-05 14:50:08,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:08,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:08,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:08,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:08,181 INFO L87 Difference]: Start difference. First operand 803 states and 2530 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:09,215 INFO L93 Difference]: Finished difference Result 1281 states and 3847 transitions. [2021-06-05 14:50:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:50:09,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:50:09,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:09,217 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 14:50:09,217 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 14:50:09,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:50:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 14:50:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 787. [2021-06-05 14:50:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.127226463104326) internal successors, (2458), 786 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2458 transitions. [2021-06-05 14:50:09,225 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2458 transitions. Word has length 25 [2021-06-05 14:50:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:09,226 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2458 transitions. [2021-06-05 14:50:09,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2458 transitions. [2021-06-05 14:50:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:50:09,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:09,227 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:09,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9419 [2021-06-05 14:50:09,427 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:09,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1513281842, now seen corresponding path program 413 times [2021-06-05 14:50:09,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:09,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879706722] [2021-06-05 14:50:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:50:09,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:09,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879706722] [2021-06-05 14:50:09,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879706722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:09,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965793906] [2021-06-05 14:50:09,520 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 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:09,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:50:09,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:09,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:50:09,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:09,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:09,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:09,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:50:09,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:09,792 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 3 treesize of output 1 [2021-06-05 14:50:09,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:09,929 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 14:50:09,930 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-05 14:50:09,933 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 4 treesize of output 2 [2021-06-05 14:50:09,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:09,937 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 4 treesize of output 2 [2021-06-05 14:50:09,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:09,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:10,002 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 4 treesize of output 2 [2021-06-05 14:50:10,003 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,006 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 4 treesize of output 2 [2021-06-05 14:50:10,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:10,068 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 3 treesize of output 1 [2021-06-05 14:50:10,069 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:10,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:50:10,128 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-05 14:50:10,394 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 3 treesize of output 1 [2021-06-05 14:50:10,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,399 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 8 treesize of output 1 [2021-06-05 14:50:10,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,476 INFO L628 ElimStorePlain]: treesize reduction 65, result has 51.1 percent of original size [2021-06-05 14:50:10,479 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 4 treesize of output 2 [2021-06-05 14:50:10,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:10,511 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 3 treesize of output 1 [2021-06-05 14:50:10,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:10,542 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 4 treesize of output 2 [2021-06-05 14:50:10,543 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:10,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:50:10,570 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-05 14:50:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:10,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965793906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:10,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:10,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 14:50:10,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927248194] [2021-06-05 14:50:10,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:10,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:10,651 INFO L87 Difference]: Start difference. First operand 787 states and 2458 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:13,055 INFO L93 Difference]: Finished difference Result 1327 states and 3926 transitions. [2021-06-05 14:50:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:50:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:50:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:13,057 INFO L225 Difference]: With dead ends: 1327 [2021-06-05 14:50:13,057 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 14:50:13,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2112.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:50:13,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 14:50:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 785. [2021-06-05 14:50:13,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.128826530612245) internal successors, (2453), 784 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2453 transitions. [2021-06-05 14:50:13,066 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2453 transitions. Word has length 25 [2021-06-05 14:50:13,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:13,066 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2453 transitions. [2021-06-05 14:50:13,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2453 transitions. [2021-06-05 14:50:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:50:13,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:13,067 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:13,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9451 [2021-06-05 14:50:13,268 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:13,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1432505886, now seen corresponding path program 414 times [2021-06-05 14:50:13,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:13,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263305675] [2021-06-05 14:50:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:50:13,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:13,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263305675] [2021-06-05 14:50:13,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263305675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:13,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942725651] [2021-06-05 14:50:13,357 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 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:13,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:13,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:50:13,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:13,753 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 3 treesize of output 1 [2021-06-05 14:50:13,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,758 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 8 treesize of output 1 [2021-06-05 14:50:13,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,926 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 14:50:13,926 INFO L628 ElimStorePlain]: treesize reduction 38, result has 79.9 percent of original size [2021-06-05 14:50:13,930 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 4 treesize of output 2 [2021-06-05 14:50:13,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,934 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 4 treesize of output 2 [2021-06-05 14:50:13,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:14,005 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 3 treesize of output 1 [2021-06-05 14:50:14,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:14,074 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 4 treesize of output 2 [2021-06-05 14:50:14,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,078 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 4 treesize of output 2 [2021-06-05 14:50:14,079 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:14,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-05 14:50:14,147 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:223, output treesize:132 [2021-06-05 14:50:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:14,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942725651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:14,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:14,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 14:50:14,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67530476] [2021-06-05 14:50:14,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:14,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:14,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:14,341 INFO L87 Difference]: Start difference. First operand 785 states and 2453 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:15,133 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 14:50:15,465 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 14:50:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:15,659 INFO L93 Difference]: Finished difference Result 969 states and 2958 transitions. [2021-06-05 14:50:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:50:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:50:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:15,661 INFO L225 Difference]: With dead ends: 969 [2021-06-05 14:50:15,661 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 14:50:15,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1357.9ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:50:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 14:50:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 723. [2021-06-05 14:50:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.149584487534626) internal successors, (2274), 722 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2274 transitions. [2021-06-05 14:50:15,668 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2274 transitions. Word has length 25 [2021-06-05 14:50:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:15,668 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2274 transitions. [2021-06-05 14:50:15,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2274 transitions. [2021-06-05 14:50:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:50:15,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:15,669 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:15,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9487,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:15,870 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash 993588152, now seen corresponding path program 415 times [2021-06-05 14:50:15,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:15,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188410994] [2021-06-05 14:50:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:50:15,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:15,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188410994] [2021-06-05 14:50:15,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188410994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:15,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514865661] [2021-06-05 14:50:15,964 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 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:16,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:50:16,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:16,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,235 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 9 treesize of output 2 [2021-06-05 14:50:16,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,239 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 9 treesize of output 2 [2021-06-05 14:50:16,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:50:16,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,246 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 3 treesize of output 1 [2021-06-05 14:50:16,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,250 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 4 treesize of output 2 [2021-06-05 14:50:16,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,253 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 4 treesize of output 2 [2021-06-05 14:50:16,254 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:16,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:16,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,337 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-05 14:50:16,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:50:16,339 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-05 14:50:16,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,550 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 8 treesize of output 1 [2021-06-05 14:50:16,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,553 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 3 treesize of output 1 [2021-06-05 14:50:16,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,586 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-06-05 14:50:16,588 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 4 treesize of output 2 [2021-06-05 14:50:16,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:16,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:16,601 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-05 14:50:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:16,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514865661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:16,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:16,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 14:50:16,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597632991] [2021-06-05 14:50:16,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:16,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:16,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:16,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:16,650 INFO L87 Difference]: Start difference. First operand 723 states and 2274 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:17,551 INFO L93 Difference]: Finished difference Result 1403 states and 4198 transitions. [2021-06-05 14:50:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:50:17,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:50:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:17,553 INFO L225 Difference]: With dead ends: 1403 [2021-06-05 14:50:17,553 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 14:50:17,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 822.2ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:50:17,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 14:50:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 749. [2021-06-05 14:50:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.18048128342246) internal successors, (2379), 748 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2379 transitions. [2021-06-05 14:50:17,562 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2379 transitions. Word has length 25 [2021-06-05 14:50:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:17,562 INFO L482 AbstractCegarLoop]: Abstraction has 749 states and 2379 transitions. [2021-06-05 14:50:17,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2379 transitions. [2021-06-05 14:50:17,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:50:17,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:17,563 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:17,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9510 [2021-06-05 14:50:17,763 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:17,763 INFO L82 PathProgramCache]: Analyzing trace with hash 701688234, now seen corresponding path program 416 times [2021-06-05 14:50:17,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:17,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964863284] [2021-06-05 14:50:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:50:17,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:17,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964863284] [2021-06-05 14:50:17,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964863284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:17,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770217525] [2021-06-05 14:50:17,855 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 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:18,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 14:50:18,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:18,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-05 14:50:18,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,180 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 4 treesize of output 2 [2021-06-05 14:50:18,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,184 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 3 treesize of output 1 [2021-06-05 14:50:18,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:50:18,195 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,197 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 4 treesize of output 2 [2021-06-05 14:50:18,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-05 14:50:18,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:18,204 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,207 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 8 treesize of output 1 [2021-06-05 14:50:18,208 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,272 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-05 14:50:18,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-05 14:50:18,274 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-05 14:50:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,507 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 9 treesize of output 2 [2021-06-05 14:50:18,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:18,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,571 INFO L628 ElimStorePlain]: treesize reduction 42, result has 56.7 percent of original size [2021-06-05 14:50:18,574 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 4 treesize of output 2 [2021-06-05 14:50:18,575 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:18,600 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 3 treesize of output 1 [2021-06-05 14:50:18,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:18,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:50:18,624 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-06-05 14:50:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770217525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:18,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:18,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 14:50:18,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703737149] [2021-06-05 14:50:18,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:50:18,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:50:18,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:18,699 INFO L87 Difference]: Start difference. First operand 749 states and 2379 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 14:50:19,417 WARN L222 SmtUtils]: Removed 9 from assertion stack [2021-06-05 14:50:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:50:19,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9563,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:19,618 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:50:19,619 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:50:19,621 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:50:19,621 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:50:19 BasicIcfg [2021-06-05 14:50:19,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:50:19,621 INFO L168 Benchmark]: Toolchain (without parser) took 770586.48 ms. Allocated memory was 339.7 MB in the beginning and 943.7 MB in the end (delta: 604.0 MB). Free memory was 319.0 MB in the beginning and 692.9 MB in the end (delta: -373.9 MB). Peak memory consumption was 231.7 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:19,621 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 339.7 MB. Free memory was 320.5 MB in the beginning and 320.4 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:50:19,622 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.39 ms. Allocated memory is still 339.7 MB. Free memory was 319.0 MB in the beginning and 317.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:50:19,622 INFO L168 Benchmark]: Boogie Preprocessor took 37.17 ms. Allocated memory is still 339.7 MB. Free memory was 317.5 MB in the beginning and 316.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:19,622 INFO L168 Benchmark]: RCFGBuilder took 550.92 ms. Allocated memory is still 339.7 MB. Free memory was 316.2 MB in the beginning and 307.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:19,622 INFO L168 Benchmark]: TraceAbstraction took 769942.52 ms. Allocated memory was 339.7 MB in the beginning and 943.7 MB in the end (delta: 604.0 MB). Free memory was 306.2 MB in the beginning and 692.9 MB in the end (delta: -386.7 MB). Peak memory consumption was 218.8 MB. Max. memory is 16.0 GB. [2021-06-05 14:50:19,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 339.7 MB. Free memory was 320.5 MB in the beginning and 320.4 MB in the end (delta: 125.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 38.39 ms. Allocated memory is still 339.7 MB. Free memory was 319.0 MB in the beginning and 317.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 37.17 ms. Allocated memory is still 339.7 MB. Free memory was 317.5 MB in the beginning and 316.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 550.92 ms. Allocated memory is still 339.7 MB. Free memory was 316.2 MB in the beginning and 307.3 MB in the end (delta: 9.0 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 769942.52 ms. Allocated memory was 339.7 MB in the beginning and 943.7 MB in the end (delta: 604.0 MB). Free memory was 306.2 MB in the beginning and 692.9 MB in the end (delta: -386.7 MB). Peak memory consumption was 218.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 137]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 15 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 55 for 14ms.. - TimeoutResultAtElement [Line: 136]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 15 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 55 for 14ms.. - TimeoutResultAtElement [Line: 133]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 15 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 55 for 14ms.. - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 15 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 55 for 14ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 769869.0ms, OverallIterations: 433, TraceHistogramMax: 3, EmptinessCheckTime: 408.4ms, AutomataDifference: 462081.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39980 SDtfs, 60921 SDslu, 296908 SDs, 0 SdLazy, 294668 SolverSat, 15089 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 123250.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25944 GetRequests, 10720 SyntacticMatches, 357 SemanticMatches, 14866 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199266 ImplicationChecksByTransitivity, 389318.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1764occurred in iteration=303, InterpolantAutomatonStates: 11982, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4245.6ms AutomataMinimizationTime, 432 MinimizatonAttempts, 154945 StatesRemovedByMinimization, 428 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2809.7ms SsaConstructionTime, 6893.3ms SatisfiabilityAnalysisTime, 176779.7ms InterpolantComputationTime, 19305 NumberOfCodeBlocks, 19290 NumberOfCodeBlocksAsserted, 1383 NumberOfCheckSat, 18455 ConstructedInterpolants, 755 QuantifiedInterpolants, 160300 SizeOfPredicates, 2439 NumberOfNonLiveVariables, 45629 ConjunctsInSsa, 8391 ConjunctsInUnsatCore, 850 InterpolantComputations, 16 PerfectInterpolantSequences, 1874/7707 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown