/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:47:23,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:47:23,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:47:23,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:47:23,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:47:23,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:47:23,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:47:23,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:47:23,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:47:23,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:47:23,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:47:23,323 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:47:23,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:47:23,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:47:23,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:47:23,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:47:23,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:47:23,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:47:23,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:47:23,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:47:23,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:47:23,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:47:23,325 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:47:23,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:47:23,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:47:23,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:47:23,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:47:23,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:47:23,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:47:23,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:47:23,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:47:23,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:47:23,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:47:23,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:47:23,327 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:47:23,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:47:23,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:47:23,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:47:23,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:47:23,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:47:23,643 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:47:23,644 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:47:23,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-07-09 17:47:23,645 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-07-09 17:47:23,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:47:23,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:47:23,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:47:23,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:47:23,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:47:23,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:47:23,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:47:23,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:47:23,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:47:23,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/1) ... [2021-07-09 17:47:23,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:47:23,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:47:23,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:47:23,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:47:23,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (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 [2021-07-09 17:47:23,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:47:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:47:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:47:23,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:47:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:47:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:47:23,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:47:23,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:47:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:47:23,788 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:47:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:47:23,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:47:23,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:47:23,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:47:23,957 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:47:23,959 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:47:23 BoogieIcfgContainer [2021-07-09 17:47:23,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:47:23,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:47:23,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:47:23,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:47:23,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:47:23" (1/2) ... [2021-07-09 17:47:23,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226a66a8 and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:47:23, skipping insertion in model container [2021-07-09 17:47:23,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:47:23" (2/2) ... [2021-07-09 17:47:23,965 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-07-09 17:47:23,970 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:47:23,970 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:47:23,970 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:47:23,971 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:47:24,013 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:47:24,032 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:47:24,051 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:47:24,052 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:47:24,052 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:47:24,052 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:47:24,052 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:47:24,052 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:47:24,052 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:47:24,052 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:47:24,060 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2021-07-09 17:47:24,114 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 86 states have (on average 2.616279069767442) internal successors, (225), 86 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 86 states have (on average 2.616279069767442) internal successors, (225), 86 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:47:24,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:24,123 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:24,123 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:24,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:24,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1648741274, now seen corresponding path program 1 times [2021-07-09 17:47:24,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:24,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573596087] [2021-07-09 17:47:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:24,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:24,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573596087] [2021-07-09 17:47:24,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573596087] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:24,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:24,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:47:24,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703614279] [2021-07-09 17:47:24,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:47:24,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:24,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:47:24,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:47:24,308 INFO L87 Difference]: Start difference. First operand has 87 states, 86 states have (on average 2.616279069767442) internal successors, (225), 86 states have internal predecessors, (225), 0 states have call successors, (0), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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) [2021-07-09 17:47:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:24,353 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2021-07-09 17:47:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:47:24,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 [2021-07-09 17:47:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:24,363 INFO L225 Difference]: With dead ends: 84 [2021-07-09 17:47:24,363 INFO L226 Difference]: Without dead ends: 56 [2021-07-09 17:47:24,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:47:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-09 17:47:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-07-09 17:47:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2021-07-09 17:47:24,408 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 14 [2021-07-09 17:47:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:24,409 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2021-07-09 17:47:24,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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) [2021-07-09 17:47:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2021-07-09 17:47:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:47:24,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:24,411 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:24,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:47:24,412 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:24,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:24,416 INFO L82 PathProgramCache]: Analyzing trace with hash -482229000, now seen corresponding path program 2 times [2021-07-09 17:47:24,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:24,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668636571] [2021-07-09 17:47:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:24,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:24,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668636571] [2021-07-09 17:47:24,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668636571] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:24,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:24,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:47:24,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601606627] [2021-07-09 17:47:24,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:47:24,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:47:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:47:24,459 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-07-09 17:47:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:24,506 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2021-07-09 17:47:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:47:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 [2021-07-09 17:47:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:24,511 INFO L225 Difference]: With dead ends: 80 [2021-07-09 17:47:24,511 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 17:47:24,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:47:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 17:47:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-07-09 17:47:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-07-09 17:47:24,532 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 14 [2021-07-09 17:47:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:24,532 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-07-09 17:47:24,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-07-09 17:47:24,532 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-07-09 17:47:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:47:24,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:24,533 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:24,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:47:24,534 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747962, now seen corresponding path program 1 times [2021-07-09 17:47:24,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:24,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855847781] [2021-07-09 17:47:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:24,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:24,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855847781] [2021-07-09 17:47:24,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855847781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:24,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915847365] [2021-07-09 17:47:24,582 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 [2021-07-09 17:47:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:24,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:47:24,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:24,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915847365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:24,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:24,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 17:47:24,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082843458] [2021-07-09 17:47:24,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:47:24,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:24,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:47:24,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:24,757 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:24,801 INFO L93 Difference]: Finished difference Result 90 states and 188 transitions. [2021-07-09 17:47:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:47:24,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:47:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:24,802 INFO L225 Difference]: With dead ends: 90 [2021-07-09 17:47:24,803 INFO L226 Difference]: Without dead ends: 76 [2021-07-09 17:47:24,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-09 17:47:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-07-09 17:47:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-07-09 17:47:24,809 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-07-09 17:47:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:24,809 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-07-09 17:47:24,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-07-09 17:47:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 17:47:24,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:24,810 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:25,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 17:47:25,029 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:25,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:25,030 INFO L82 PathProgramCache]: Analyzing trace with hash -255759302, now seen corresponding path program 1 times [2021-07-09 17:47:25,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:25,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807917319] [2021-07-09 17:47:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:25,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807917319] [2021-07-09 17:47:25,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807917319] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:47:25,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:47:25,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:47:25,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006660197] [2021-07-09 17:47:25,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:47:25,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:47:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:47:25,136 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.2) 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) [2021-07-09 17:47:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:25,202 INFO L93 Difference]: Finished difference Result 98 states and 208 transitions. [2021-07-09 17:47:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:47:25,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) 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 [2021-07-09 17:47:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:25,203 INFO L225 Difference]: With dead ends: 98 [2021-07-09 17:47:25,203 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 17:47:25,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:47:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 17:47:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-07-09 17:47:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-07-09 17:47:25,209 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-07-09 17:47:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:25,209 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-07-09 17:47:25,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) 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) [2021-07-09 17:47:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-07-09 17:47:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:47:25,210 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:25,210 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:25,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:47:25,210 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash -384325124, now seen corresponding path program 2 times [2021-07-09 17:47:25,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:25,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341517671] [2021-07-09 17:47:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:25,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341517671] [2021-07-09 17:47:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341517671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979455179] [2021-07-09 17:47:25,266 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 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 [2021-07-09 17:47:25,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:47:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979455179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:25,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:47:25,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058664673] [2021-07-09 17:47:25,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:25,451 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-07-09 17:47:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:25,513 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-07-09 17:47:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:47:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-07-09 17:47:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:25,514 INFO L225 Difference]: With dead ends: 108 [2021-07-09 17:47:25,515 INFO L226 Difference]: Without dead ends: 94 [2021-07-09 17:47:25,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:47:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-09 17:47:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-07-09 17:47:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 189 transitions. [2021-07-09 17:47:25,521 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 189 transitions. Word has length 18 [2021-07-09 17:47:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:25,521 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 189 transitions. [2021-07-09 17:47:25,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-07-09 17:47:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 189 transitions. [2021-07-09 17:47:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:47:25,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:25,522 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:25,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:25,745 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -196634824, now seen corresponding path program 1 times [2021-07-09 17:47:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:25,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085730967] [2021-07-09 17:47:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:25,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085730967] [2021-07-09 17:47:25,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085730967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821492125] [2021-07-09 17:47:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:47:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:25,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:25,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821492125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:25,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:25,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 17:47:25,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268502936] [2021-07-09 17:47:25,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:47:25,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:25,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:47:25,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:47:25,906 INFO L87 Difference]: Start difference. First operand 86 states and 189 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-07-09 17:47:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:26,019 INFO L93 Difference]: Finished difference Result 156 states and 344 transitions. [2021-07-09 17:47:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:47:26,019 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-07-09 17:47:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:26,020 INFO L225 Difference]: With dead ends: 156 [2021-07-09 17:47:26,020 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 17:47:26,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:47:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 17:47:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-07-09 17:47:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.299145299145299) internal successors, (269), 117 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 269 transitions. [2021-07-09 17:47:26,029 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 269 transitions. Word has length 18 [2021-07-09 17:47:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:26,030 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 269 transitions. [2021-07-09 17:47:26,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-07-09 17:47:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 269 transitions. [2021-07-09 17:47:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:47:26,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:26,033 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:26,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:26,234 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:26,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1717092286, now seen corresponding path program 3 times [2021-07-09 17:47:26,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:26,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952583526] [2021-07-09 17:47:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:26,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952583526] [2021-07-09 17:47:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952583526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747238906] [2021-07-09 17:47:26,308 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 [2021-07-09 17:47:26,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:26,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:26,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747238906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:26,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:26,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:47:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525056571] [2021-07-09 17:47:26,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:47:26,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:47:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:26,480 INFO L87 Difference]: Start difference. First operand 118 states and 269 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:26,593 INFO L93 Difference]: Finished difference Result 142 states and 316 transitions. [2021-07-09 17:47:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:47:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:47:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:26,594 INFO L225 Difference]: With dead ends: 142 [2021-07-09 17:47:26,594 INFO L226 Difference]: Without dead ends: 128 [2021-07-09 17:47:26,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-09 17:47:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-07-09 17:47:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-07-09 17:47:26,601 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-07-09 17:47:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:26,601 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-07-09 17:47:26,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-07-09 17:47:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:47:26,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:26,603 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:26,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:26,817 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1886534454, now seen corresponding path program 2 times [2021-07-09 17:47:26,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:26,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976919179] [2021-07-09 17:47:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:26,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976919179] [2021-07-09 17:47:26,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976919179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680060666] [2021-07-09 17:47:26,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:26,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:47:26,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:27,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680060666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:27,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:27,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:47:27,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982150836] [2021-07-09 17:47:27,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:47:27,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:27,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:47:27,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:27,013 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:27,119 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-07-09 17:47:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:47:27,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:47:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:27,121 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:47:27,121 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:47:27,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:47:27,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:47:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-07-09 17:47:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2021-07-09 17:47:27,126 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 20 [2021-07-09 17:47:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:27,127 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2021-07-09 17:47:27,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2021-07-09 17:47:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:47:27,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:27,128 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:27,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:47:27,341 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash 132809022, now seen corresponding path program 2 times [2021-07-09 17:47:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:27,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862683495] [2021-07-09 17:47:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:27,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862683495] [2021-07-09 17:47:27,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862683495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:27,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412702273] [2021-07-09 17:47:27,395 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 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 [2021-07-09 17:47:27,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:27,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:47:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:27,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412702273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:27,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:27,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 17:47:27,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920702246] [2021-07-09 17:47:27,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:47:27,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:27,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:47:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:47:27,565 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:27,681 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-07-09 17:47:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:47:27,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:47:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:27,682 INFO L225 Difference]: With dead ends: 150 [2021-07-09 17:47:27,682 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:47:27,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:27,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:47:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-07-09 17:47:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-07-09 17:47:27,686 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-07-09 17:47:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:27,686 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-07-09 17:47:27,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-07-09 17:47:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:27,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:27,687 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:27,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:47:27,905 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:27,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1750373120, now seen corresponding path program 4 times [2021-07-09 17:47:27,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:27,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532242954] [2021-07-09 17:47:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:27,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:27,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532242954] [2021-07-09 17:47:27,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532242954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:27,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551151155] [2021-07-09 17:47:27,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:28,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:28,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:47:28,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551151155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:28,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:47:28,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530852973] [2021-07-09 17:47:28,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:47:28,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:28,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:47:28,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:28,176 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-07-09 17:47:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:28,371 INFO L93 Difference]: Finished difference Result 212 states and 476 transitions. [2021-07-09 17:47:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:47:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:28,373 INFO L225 Difference]: With dead ends: 212 [2021-07-09 17:47:28,373 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 17:47:28,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:47:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 17:47:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-07-09 17:47:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-07-09 17:47:28,378 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-07-09 17:47:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:28,378 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-07-09 17:47:28,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-07-09 17:47:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-07-09 17:47:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:28,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:28,379 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:28,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:28,593 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1768621252, now seen corresponding path program 3 times [2021-07-09 17:47:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:28,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730538428] [2021-07-09 17:47:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:28,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730538428] [2021-07-09 17:47:28,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730538428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516861384] [2021-07-09 17:47:28,671 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 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 [2021-07-09 17:47:28,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:47:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:28,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516861384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:28,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:28,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:47:28,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661938197] [2021-07-09 17:47:28,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:47:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:47:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:28,853 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-07-09 17:47:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:29,131 INFO L93 Difference]: Finished difference Result 368 states and 820 transitions. [2021-07-09 17:47:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:47:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 17:47:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:29,134 INFO L225 Difference]: With dead ends: 368 [2021-07-09 17:47:29,134 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 17:47:29,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:47:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 17:47:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 214. [2021-07-09 17:47:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-07-09 17:47:29,142 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 22 [2021-07-09 17:47:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:29,142 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-07-09 17:47:29,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-07-09 17:47:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-07-09 17:47:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 17:47:29,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:29,144 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:29,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:47:29,366 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1909707008, now seen corresponding path program 3 times [2021-07-09 17:47:29,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:29,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425939603] [2021-07-09 17:47:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:29,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:29,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425939603] [2021-07-09 17:47:29,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425939603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:29,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109096423] [2021-07-09 17:47:29,429 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 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 [2021-07-09 17:47:29,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:47:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:47:29,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:29,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109096423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:29,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:29,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:47:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775470864] [2021-07-09 17:47:29,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:47:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:29,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:47:29,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:47:29,638 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-07-09 17:47:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:29,865 INFO L93 Difference]: Finished difference Result 284 states and 664 transitions. [2021-07-09 17:47:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:29,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 [2021-07-09 17:47:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:29,867 INFO L225 Difference]: With dead ends: 284 [2021-07-09 17:47:29,867 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 17:47:29,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:47:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 17:47:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 230. [2021-07-09 17:47:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.3973799126637556) internal successors, (549), 229 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) [2021-07-09 17:47:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 549 transitions. [2021-07-09 17:47:29,874 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 549 transitions. Word has length 22 [2021-07-09 17:47:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:29,874 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 549 transitions. [2021-07-09 17:47:29,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-07-09 17:47:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 549 transitions. [2021-07-09 17:47:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:29,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:29,875 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:30,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:30,089 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash 828453442, now seen corresponding path program 4 times [2021-07-09 17:47:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:30,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923281412] [2021-07-09 17:47:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:30,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:30,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923281412] [2021-07-09 17:47:30,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923281412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:30,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862466261] [2021-07-09 17:47:30,168 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 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 [2021-07-09 17:47:30,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:30,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:30,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862466261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:30,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:30,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:30,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954973766] [2021-07-09 17:47:30,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:30,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:30,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:30,387 INFO L87 Difference]: Start difference. First operand 230 states and 549 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:30,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:30,646 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-07-09 17:47:30,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:30,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:30,648 INFO L225 Difference]: With dead ends: 300 [2021-07-09 17:47:30,649 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 17:47:30,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:47:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 17:47:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2021-07-09 17:47:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-07-09 17:47:30,656 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-07-09 17:47:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:30,656 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-07-09 17:47:30,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-07-09 17:47:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:30,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:30,657 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:30,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:47:30,869 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:30,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:30,869 INFO L82 PathProgramCache]: Analyzing trace with hash -902316290, now seen corresponding path program 5 times [2021-07-09 17:47:30,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:30,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606786298] [2021-07-09 17:47:30,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:30,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:30,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606786298] [2021-07-09 17:47:30,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606786298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:30,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734054610] [2021-07-09 17:47:30,946 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 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 [2021-07-09 17:47:30,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:47:30,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:31,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734054610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:31,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:31,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:31,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736113186] [2021-07-09 17:47:31,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:31,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:31,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:31,206 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:31,482 INFO L93 Difference]: Finished difference Result 324 states and 768 transitions. [2021-07-09 17:47:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:31,483 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:31,484 INFO L225 Difference]: With dead ends: 324 [2021-07-09 17:47:31,484 INFO L226 Difference]: Without dead ends: 302 [2021-07-09 17:47:31,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:47:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-09 17:47:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2021-07-09 17:47:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-07-09 17:47:31,492 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-07-09 17:47:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:31,492 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-07-09 17:47:31,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-07-09 17:47:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:31,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:31,493 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:31,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:47:31,717 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:31,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:31,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1108254722, now seen corresponding path program 6 times [2021-07-09 17:47:31,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:31,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925334558] [2021-07-09 17:47:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:31,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:31,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925334558] [2021-07-09 17:47:31,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925334558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:31,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780610719] [2021-07-09 17:47:31,789 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 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 [2021-07-09 17:47:31,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:47:31,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:31,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:31,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:32,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780610719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:32,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:32,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931307468] [2021-07-09 17:47:32,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:32,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:32,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:32,038 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:32,292 INFO L93 Difference]: Finished difference Result 356 states and 840 transitions. [2021-07-09 17:47:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:32,296 INFO L225 Difference]: With dead ends: 356 [2021-07-09 17:47:32,296 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 17:47:32,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:47:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 17:47:32,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 278. [2021-07-09 17:47:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-07-09 17:47:32,309 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-07-09 17:47:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:32,310 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-07-09 17:47:32,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-07-09 17:47:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:32,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:32,315 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:32,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:32,524 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash -920564422, now seen corresponding path program 7 times [2021-07-09 17:47:32,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:32,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469304025] [2021-07-09 17:47:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:32,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469304025] [2021-07-09 17:47:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469304025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560531495] [2021-07-09 17:47:32,609 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 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 [2021-07-09 17:47:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:32,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560531495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:32,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:32,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:32,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904068013] [2021-07-09 17:47:32,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:32,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:32,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:32,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:32,837 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:33,087 INFO L93 Difference]: Finished difference Result 308 states and 732 transitions. [2021-07-09 17:47:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:33,087 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:33,089 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:47:33,089 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:47:33,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:47:33,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:47:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 278. [2021-07-09 17:47:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-07-09 17:47:33,096 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-07-09 17:47:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:33,096 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-07-09 17:47:33,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-07-09 17:47:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:33,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:33,097 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:33,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:47:33,313 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:33,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1620677442, now seen corresponding path program 8 times [2021-07-09 17:47:33,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:33,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34690471] [2021-07-09 17:47:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:33,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:33,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34690471] [2021-07-09 17:47:33,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34690471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:33,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018354130] [2021-07-09 17:47:33,373 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 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 [2021-07-09 17:47:33,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:33,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:33,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018354130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:33,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:33,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:33,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18661013] [2021-07-09 17:47:33,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:33,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:33,571 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:33,857 INFO L93 Difference]: Finished difference Result 348 states and 828 transitions. [2021-07-09 17:47:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:33,859 INFO L225 Difference]: With dead ends: 348 [2021-07-09 17:47:33,859 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 17:47:33,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:47:33,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 17:47:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 294. [2021-07-09 17:47:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-07-09 17:47:33,868 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-07-09 17:47:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:33,868 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-07-09 17:47:33,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-07-09 17:47:33,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:33,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:33,869 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:34,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:34,089 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:34,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:34,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1277150090, now seen corresponding path program 9 times [2021-07-09 17:47:34,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:34,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224340268] [2021-07-09 17:47:34,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:34,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224340268] [2021-07-09 17:47:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224340268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754156630] [2021-07-09 17:47:34,149 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 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 [2021-07-09 17:47:34,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:47:34,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:34,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:34,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754156630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:34,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:34,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:34,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203719898] [2021-07-09 17:47:34,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:34,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:34,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:34,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:34,312 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:34,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:34,452 INFO L93 Difference]: Finished difference Result 324 states and 772 transitions. [2021-07-09 17:47:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:34,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:34,454 INFO L225 Difference]: With dead ends: 324 [2021-07-09 17:47:34,454 INFO L226 Difference]: Without dead ends: 310 [2021-07-09 17:47:34,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:47:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-07-09 17:47:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-07-09 17:47:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-07-09 17:47:34,461 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-07-09 17:47:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:34,461 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-07-09 17:47:34,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:34,461 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-07-09 17:47:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:34,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:34,462 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:34,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:34,673 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash 16240442, now seen corresponding path program 10 times [2021-07-09 17:47:34,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:34,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446545132] [2021-07-09 17:47:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:34,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:34,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446545132] [2021-07-09 17:47:34,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446545132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:34,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592061678] [2021-07-09 17:47:34,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:47:34,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:34,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:34,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:34,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:34,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592061678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:34,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:34,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:34,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824705252] [2021-07-09 17:47:34,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:34,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:34,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:34,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:34,955 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:35,166 INFO L93 Difference]: Finished difference Result 340 states and 812 transitions. [2021-07-09 17:47:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:47:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:35,168 INFO L225 Difference]: With dead ends: 340 [2021-07-09 17:47:35,168 INFO L226 Difference]: Without dead ends: 326 [2021-07-09 17:47:35,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:47:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-07-09 17:47:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 286. [2021-07-09 17:47:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-07-09 17:47:35,176 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-07-09 17:47:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:35,176 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-07-09 17:47:35,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-07-09 17:47:35,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:35,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:35,177 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:35,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:35,393 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1448836354, now seen corresponding path program 11 times [2021-07-09 17:47:35,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:35,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638420380] [2021-07-09 17:47:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:35,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638420380] [2021-07-09 17:47:35,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638420380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051418107] [2021-07-09 17:47:35,463 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 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 [2021-07-09 17:47:35,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:47:35,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:35,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:35,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051418107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:35,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:35,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:35,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722326491] [2021-07-09 17:47:35,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:35,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:35,635 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:35,928 INFO L93 Difference]: Finished difference Result 356 states and 848 transitions. [2021-07-09 17:47:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:35,930 INFO L225 Difference]: With dead ends: 356 [2021-07-09 17:47:35,930 INFO L226 Difference]: Without dead ends: 334 [2021-07-09 17:47:35,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:47:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-07-09 17:47:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 294. [2021-07-09 17:47:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-07-09 17:47:35,938 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-07-09 17:47:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:35,938 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-07-09 17:47:35,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-07-09 17:47:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:35,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:35,939 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:36,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 17:47:36,163 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:36,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2007690, now seen corresponding path program 12 times [2021-07-09 17:47:36,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:36,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022353068] [2021-07-09 17:47:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:36,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:36,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022353068] [2021-07-09 17:47:36,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022353068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:36,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60764949] [2021-07-09 17:47:36,245 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 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 [2021-07-09 17:47:36,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:36,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:36,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:36,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:36,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60764949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:36,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:36,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:36,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105175896] [2021-07-09 17:47:36,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:36,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:36,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:36,426 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:36,640 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-07-09 17:47:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:36,642 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:47:36,642 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 17:47:36,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:47:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 17:47:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 286. [2021-07-09 17:47:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-07-09 17:47:36,649 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-07-09 17:47:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:36,649 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-07-09 17:47:36,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-07-09 17:47:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:36,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:36,650 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:36,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 17:47:36,865 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1390424506, now seen corresponding path program 13 times [2021-07-09 17:47:36,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:36,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635702354] [2021-07-09 17:47:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:36,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:36,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635702354] [2021-07-09 17:47:36,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635702354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:36,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015881949] [2021-07-09 17:47:36,948 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 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 [2021-07-09 17:47:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:37,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015881949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:37,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:37,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827105793] [2021-07-09 17:47:37,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:37,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:37,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:37,145 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:37,381 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-07-09 17:47:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:37,383 INFO L225 Difference]: With dead ends: 332 [2021-07-09 17:47:37,383 INFO L226 Difference]: Without dead ends: 310 [2021-07-09 17:47:37,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:47:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-07-09 17:47:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-07-09 17:47:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-07-09 17:47:37,390 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-07-09 17:47:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:37,390 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-07-09 17:47:37,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-07-09 17:47:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:37,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:37,391 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:37,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:47:37,614 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:37,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash -340345226, now seen corresponding path program 14 times [2021-07-09 17:47:37,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:37,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278280352] [2021-07-09 17:47:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:37,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:37,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278280352] [2021-07-09 17:47:37,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278280352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:37,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154385846] [2021-07-09 17:47:37,674 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 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 [2021-07-09 17:47:37,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:37,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:37,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154385846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:37,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:37,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:37,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138077980] [2021-07-09 17:47:37,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:37,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:37,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:37,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:37,884 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:38,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:38,027 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-07-09 17:47:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:38,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:38,035 INFO L225 Difference]: With dead ends: 308 [2021-07-09 17:47:38,035 INFO L226 Difference]: Without dead ends: 294 [2021-07-09 17:47:38,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:47:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-09 17:47:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-07-09 17:47:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-07-09 17:47:38,042 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-07-09 17:47:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:38,042 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-07-09 17:47:38,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-07-09 17:47:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:38,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:38,043 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:38,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 17:47:38,259 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:38,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash -546283658, now seen corresponding path program 15 times [2021-07-09 17:47:38,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:38,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285727206] [2021-07-09 17:47:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:38,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285727206] [2021-07-09 17:47:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285727206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630783005] [2021-07-09 17:47:38,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:38,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:38,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:38,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:38,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:38,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630783005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:38,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:38,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217026176] [2021-07-09 17:47:38,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:38,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:38,506 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:38,657 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-07-09 17:47:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:47:38,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:38,659 INFO L225 Difference]: With dead ends: 300 [2021-07-09 17:47:38,659 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:47:38,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:47:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:47:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-07-09 17:47:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-07-09 17:47:38,665 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-07-09 17:47:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:38,665 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-07-09 17:47:38,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-07-09 17:47:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:47:38,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:38,666 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:38,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:38,866 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash -358593358, now seen corresponding path program 16 times [2021-07-09 17:47:38,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:38,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500494012] [2021-07-09 17:47:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:38,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500494012] [2021-07-09 17:47:38,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500494012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215265138] [2021-07-09 17:47:38,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:38,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:38,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:47:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215265138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:39,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 17:47:39,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227233007] [2021-07-09 17:47:39,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:47:39,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:39,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:47:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:47:39,124 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:39,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:39,344 INFO L93 Difference]: Finished difference Result 340 states and 804 transitions. [2021-07-09 17:47:39,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:39,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 17:47:39,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:39,345 INFO L225 Difference]: With dead ends: 340 [2021-07-09 17:47:39,345 INFO L226 Difference]: Without dead ends: 318 [2021-07-09 17:47:39,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:47:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-09 17:47:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-07-09 17:47:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-07-09 17:47:39,351 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-07-09 17:47:39,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:39,351 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-07-09 17:47:39,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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) [2021-07-09 17:47:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-07-09 17:47:39,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:39,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:39,352 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:39,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:39,569 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1945240768, now seen corresponding path program 17 times [2021-07-09 17:47:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:39,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935384328] [2021-07-09 17:47:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:39,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:39,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935384328] [2021-07-09 17:47:39,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935384328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615098356] [2021-07-09 17:47:39,640 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 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 [2021-07-09 17:47:39,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:47:39,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:39,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:39,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:39,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615098356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:39,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:39,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:39,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225365131] [2021-07-09 17:47:39,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:39,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:39,889 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:40,147 INFO L93 Difference]: Finished difference Result 388 states and 920 transitions. [2021-07-09 17:47:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:40,149 INFO L225 Difference]: With dead ends: 388 [2021-07-09 17:47:40,149 INFO L226 Difference]: Without dead ends: 358 [2021-07-09 17:47:40,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-07-09 17:47:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 278. [2021-07-09 17:47:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4007220216606497) internal successors, (665), 277 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 665 transitions. [2021-07-09 17:47:40,155 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 665 transitions. Word has length 26 [2021-07-09 17:47:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:40,155 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 665 transitions. [2021-07-09 17:47:40,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 665 transitions. [2021-07-09 17:47:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:40,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:40,156 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:40,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:47:40,379 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1787202428, now seen corresponding path program 18 times [2021-07-09 17:47:40,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:40,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43824453] [2021-07-09 17:47:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:40,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:40,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43824453] [2021-07-09 17:47:40,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43824453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:40,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296390427] [2021-07-09 17:47:40,465 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 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 [2021-07-09 17:47:40,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:47:40,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:40,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296390427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:40,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:40,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:40,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262266216] [2021-07-09 17:47:40,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:40,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:40,701 INFO L87 Difference]: Start difference. First operand 278 states and 665 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:41,012 INFO L93 Difference]: Finished difference Result 452 states and 1076 transitions. [2021-07-09 17:47:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:41,014 INFO L225 Difference]: With dead ends: 452 [2021-07-09 17:47:41,014 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:47:41,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:47:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:47:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 310. [2021-07-09 17:47:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.411003236245955) internal successors, (745), 309 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 745 transitions. [2021-07-09 17:47:41,021 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 745 transitions. Word has length 26 [2021-07-09 17:47:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:41,021 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 745 transitions. [2021-07-09 17:47:41,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 745 transitions. [2021-07-09 17:47:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:41,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:41,022 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:41,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:41,237 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1974892728, now seen corresponding path program 19 times [2021-07-09 17:47:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:41,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604019648] [2021-07-09 17:47:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:41,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604019648] [2021-07-09 17:47:41,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604019648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367915733] [2021-07-09 17:47:41,319 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 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 [2021-07-09 17:47:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:41,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:41,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367915733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:41,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:41,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:41,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833968365] [2021-07-09 17:47:41,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:41,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:41,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:41,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:41,564 INFO L87 Difference]: Start difference. First operand 310 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:41,869 INFO L93 Difference]: Finished difference Result 536 states and 1240 transitions. [2021-07-09 17:47:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:47:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:41,871 INFO L225 Difference]: With dead ends: 536 [2021-07-09 17:47:41,871 INFO L226 Difference]: Without dead ends: 494 [2021-07-09 17:47:41,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-07-09 17:47:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 342. [2021-07-09 17:47:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.43108504398827) internal successors, (829), 341 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 829 transitions. [2021-07-09 17:47:41,879 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 829 transitions. Word has length 26 [2021-07-09 17:47:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:41,879 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 829 transitions. [2021-07-09 17:47:41,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 829 transitions. [2021-07-09 17:47:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:41,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:41,880 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:42,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 17:47:42,081 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1803206464, now seen corresponding path program 20 times [2021-07-09 17:47:42,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:42,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038624160] [2021-07-09 17:47:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:42,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:42,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038624160] [2021-07-09 17:47:42,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038624160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698231350] [2021-07-09 17:47:42,149 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 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 [2021-07-09 17:47:42,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:42,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698231350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:42,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:42,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950862365] [2021-07-09 17:47:42,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:42,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:42,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:42,350 INFO L87 Difference]: Start difference. First operand 342 states and 829 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:42,586 INFO L93 Difference]: Finished difference Result 460 states and 1104 transitions. [2021-07-09 17:47:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:42,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:42,588 INFO L225 Difference]: With dead ends: 460 [2021-07-09 17:47:42,588 INFO L226 Difference]: Without dead ends: 430 [2021-07-09 17:47:42,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-07-09 17:47:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 350. [2021-07-09 17:47:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.432664756446991) internal successors, (849), 349 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 849 transitions. [2021-07-09 17:47:42,595 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 849 transitions. Word has length 26 [2021-07-09 17:47:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:42,595 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 849 transitions. [2021-07-09 17:47:42,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 849 transitions. [2021-07-09 17:47:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:42,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:42,596 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:42,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 17:47:42,805 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1232622468, now seen corresponding path program 21 times [2021-07-09 17:47:42,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:42,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230287743] [2021-07-09 17:47:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:42,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:42,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230287743] [2021-07-09 17:47:42,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230287743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:42,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362884802] [2021-07-09 17:47:42,877 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 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 [2021-07-09 17:47:42,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:47:42,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:42,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362884802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:43,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:43,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:43,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088538808] [2021-07-09 17:47:43,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:43,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:43,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:43,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:43,125 INFO L87 Difference]: Start difference. First operand 350 states and 849 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:43,414 INFO L93 Difference]: Finished difference Result 492 states and 1180 transitions. [2021-07-09 17:47:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:43,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:43,417 INFO L225 Difference]: With dead ends: 492 [2021-07-09 17:47:43,417 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:47:43,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:47:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 358. [2021-07-09 17:47:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.434173669467787) internal successors, (869), 357 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 869 transitions. [2021-07-09 17:47:43,424 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 869 transitions. Word has length 26 [2021-07-09 17:47:43,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:43,424 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 869 transitions. [2021-07-09 17:47:43,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:43,424 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 869 transitions. [2021-07-09 17:47:43,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:43,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:43,425 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:43,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 17:47:43,641 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:43,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1044932168, now seen corresponding path program 22 times [2021-07-09 17:47:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:43,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550401403] [2021-07-09 17:47:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:43,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:43,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550401403] [2021-07-09 17:47:43,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550401403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:43,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93996082] [2021-07-09 17:47:43,714 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 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 [2021-07-09 17:47:43,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:43,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:43,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93996082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:43,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:43,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:43,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531512750] [2021-07-09 17:47:43,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:43,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:43,963 INFO L87 Difference]: Start difference. First operand 358 states and 869 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:44,285 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-07-09 17:47:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:47:44,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:44,286 INFO L225 Difference]: With dead ends: 548 [2021-07-09 17:47:44,287 INFO L226 Difference]: Without dead ends: 518 [2021-07-09 17:47:44,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:47:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-09 17:47:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 390. [2021-07-09 17:47:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.4395886889460154) internal successors, (949), 389 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) [2021-07-09 17:47:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 949 transitions. [2021-07-09 17:47:44,294 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 949 transitions. Word has length 26 [2021-07-09 17:47:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:44,294 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 949 transitions. [2021-07-09 17:47:44,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 949 transitions. [2021-07-09 17:47:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:44,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:44,295 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:44,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 17:47:44,509 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:44,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1570960004, now seen corresponding path program 23 times [2021-07-09 17:47:44,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:44,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372099726] [2021-07-09 17:47:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:44,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372099726] [2021-07-09 17:47:44,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372099726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169347728] [2021-07-09 17:47:44,579 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 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 [2021-07-09 17:47:44,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:47:44,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:44,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169347728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:44,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:44,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:44,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693940792] [2021-07-09 17:47:44,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:44,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:44,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:44,818 INFO L87 Difference]: Start difference. First operand 390 states and 949 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:45,194 INFO L93 Difference]: Finished difference Result 556 states and 1340 transitions. [2021-07-09 17:47:45,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:47:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:45,196 INFO L225 Difference]: With dead ends: 556 [2021-07-09 17:47:45,196 INFO L226 Difference]: Without dead ends: 518 [2021-07-09 17:47:45,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:47:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-09 17:47:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-07-09 17:47:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 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) [2021-07-09 17:47:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-07-09 17:47:45,204 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-07-09 17:47:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:45,204 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-07-09 17:47:45,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-07-09 17:47:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:45,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:45,205 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:45,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-09 17:47:45,417 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1383269704, now seen corresponding path program 24 times [2021-07-09 17:47:45,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:45,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270640278] [2021-07-09 17:47:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:45,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:45,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270640278] [2021-07-09 17:47:45,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270640278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:45,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202818143] [2021-07-09 17:47:45,487 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 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 [2021-07-09 17:47:45,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:47:45,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:45,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:45,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202818143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:45,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:45,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:45,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108970956] [2021-07-09 17:47:45,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:45,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:45,719 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:45,969 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-07-09 17:47:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:47:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:45,971 INFO L225 Difference]: With dead ends: 548 [2021-07-09 17:47:45,971 INFO L226 Difference]: Without dead ends: 518 [2021-07-09 17:47:45,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:47:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-09 17:47:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-07-09 17:47:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 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) [2021-07-09 17:47:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-07-09 17:47:45,982 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-07-09 17:47:45,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:45,983 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-07-09 17:47:45,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:45,983 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-07-09 17:47:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:45,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:45,984 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:46,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:46,206 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 319483004, now seen corresponding path program 25 times [2021-07-09 17:47:46,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:46,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716183065] [2021-07-09 17:47:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:46,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716183065] [2021-07-09 17:47:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716183065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397973054] [2021-07-09 17:47:46,271 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 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 [2021-07-09 17:47:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:46,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:46,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397973054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:46,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:46,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:46,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523412546] [2021-07-09 17:47:46,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:46,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:46,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:46,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:46,532 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:46,774 INFO L93 Difference]: Finished difference Result 508 states and 1224 transitions. [2021-07-09 17:47:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:46,776 INFO L225 Difference]: With dead ends: 508 [2021-07-09 17:47:46,776 INFO L226 Difference]: Without dead ends: 478 [2021-07-09 17:47:46,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:46,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-09 17:47:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2021-07-09 17:47:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.4419753086419753) internal successors, (989), 405 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 989 transitions. [2021-07-09 17:47:46,784 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 989 transitions. Word has length 26 [2021-07-09 17:47:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:46,784 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 989 transitions. [2021-07-09 17:47:46,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 989 transitions. [2021-07-09 17:47:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:46,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:46,785 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:47,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 17:47:47,008 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash 113544572, now seen corresponding path program 26 times [2021-07-09 17:47:47,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:47,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942539195] [2021-07-09 17:47:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:47,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:47,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942539195] [2021-07-09 17:47:47,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942539195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:47,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591062360] [2021-07-09 17:47:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:47:47,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:47,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:47,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:47,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591062360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:47,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:47,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:47,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041701065] [2021-07-09 17:47:47,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:47,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:47,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:47,318 INFO L87 Difference]: Start difference. First operand 406 states and 989 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:47,598 INFO L93 Difference]: Finished difference Result 548 states and 1320 transitions. [2021-07-09 17:47:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:47,600 INFO L225 Difference]: With dead ends: 548 [2021-07-09 17:47:47,600 INFO L226 Difference]: Without dead ends: 510 [2021-07-09 17:47:47,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:47:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-09 17:47:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 422. [2021-07-09 17:47:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.4441805225653206) internal successors, (1029), 421 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) [2021-07-09 17:47:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1029 transitions. [2021-07-09 17:47:47,607 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1029 transitions. Word has length 26 [2021-07-09 17:47:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:47,607 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1029 transitions. [2021-07-09 17:47:47,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1029 transitions. [2021-07-09 17:47:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:47,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:47,608 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:47,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-09 17:47:47,825 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash -224792964, now seen corresponding path program 27 times [2021-07-09 17:47:47,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:47,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345529252] [2021-07-09 17:47:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:47,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:47,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345529252] [2021-07-09 17:47:47,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345529252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:47,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037374134] [2021-07-09 17:47:47,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:47:47,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:47:47,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:47,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:48,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037374134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:48,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:48,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:48,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521892147] [2021-07-09 17:47:48,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:48,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:48,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:48,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:48,126 INFO L87 Difference]: Start difference. First operand 422 states and 1029 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:48,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:48,583 INFO L93 Difference]: Finished difference Result 588 states and 1420 transitions. [2021-07-09 17:47:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:47:48,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:48,586 INFO L225 Difference]: With dead ends: 588 [2021-07-09 17:47:48,586 INFO L226 Difference]: Without dead ends: 550 [2021-07-09 17:47:48,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:47:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-09 17:47:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 438. [2021-07-09 17:47:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.446224256292906) internal successors, (1069), 437 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1069 transitions. [2021-07-09 17:47:48,594 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1069 transitions. Word has length 26 [2021-07-09 17:47:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:48,594 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1069 transitions. [2021-07-09 17:47:48,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1069 transitions. [2021-07-09 17:47:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:48,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:48,595 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:48,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:48,819 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:48,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:48,819 INFO L82 PathProgramCache]: Analyzing trace with hash -37102664, now seen corresponding path program 28 times [2021-07-09 17:47:48,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:48,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770848254] [2021-07-09 17:47:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:48,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:48,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770848254] [2021-07-09 17:47:48,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770848254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:48,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736390395] [2021-07-09 17:47:48,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:48,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:48,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736390395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:49,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:49,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:49,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026222655] [2021-07-09 17:47:49,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:49,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:49,163 INFO L87 Difference]: Start difference. First operand 438 states and 1069 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:49,485 INFO L93 Difference]: Finished difference Result 720 states and 1704 transitions. [2021-07-09 17:47:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:47:49,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:49,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:49,488 INFO L225 Difference]: With dead ends: 720 [2021-07-09 17:47:49,488 INFO L226 Difference]: Without dead ends: 678 [2021-07-09 17:47:49,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:47:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-09 17:47:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 446. [2021-07-09 17:47:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.447191011235955) internal successors, (1089), 445 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1089 transitions. [2021-07-09 17:47:49,497 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1089 transitions. Word has length 26 [2021-07-09 17:47:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:49,497 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1089 transitions. [2021-07-09 17:47:49,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1089 transitions. [2021-07-09 17:47:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:49,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:49,498 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:49,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-09 17:47:49,721 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1675418936, now seen corresponding path program 29 times [2021-07-09 17:47:49,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:49,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315727109] [2021-07-09 17:47:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:49,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:49,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315727109] [2021-07-09 17:47:49,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315727109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:49,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103024041] [2021-07-09 17:47:49,794 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 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 [2021-07-09 17:47:49,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:47:49,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:50,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103024041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:50,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:50,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:50,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877242605] [2021-07-09 17:47:50,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:50,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:50,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:50,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:50,007 INFO L87 Difference]: Start difference. First operand 446 states and 1089 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:50,356 INFO L93 Difference]: Finished difference Result 634 states and 1499 transitions. [2021-07-09 17:47:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:47:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:50,358 INFO L225 Difference]: With dead ends: 634 [2021-07-09 17:47:50,358 INFO L226 Difference]: Without dead ends: 604 [2021-07-09 17:47:50,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:47:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-09 17:47:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 470. [2021-07-09 17:47:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.458422174840085) internal successors, (1153), 469 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1153 transitions. [2021-07-09 17:47:50,367 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1153 transitions. Word has length 26 [2021-07-09 17:47:50,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:50,367 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1153 transitions. [2021-07-09 17:47:50,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1153 transitions. [2021-07-09 17:47:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:50,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:50,369 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:50,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:50,577 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:50,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1238039736, now seen corresponding path program 30 times [2021-07-09 17:47:50,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:50,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889868053] [2021-07-09 17:47:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:50,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:50,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889868053] [2021-07-09 17:47:50,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889868053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:50,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339363297] [2021-07-09 17:47:50,655 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 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 [2021-07-09 17:47:50,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:47:50,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:50,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:50,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339363297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:50,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:50,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:50,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41774600] [2021-07-09 17:47:50,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:50,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:50,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:50,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:50,896 INFO L87 Difference]: Start difference. First operand 470 states and 1153 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:51,270 INFO L93 Difference]: Finished difference Result 636 states and 1548 transitions. [2021-07-09 17:47:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:51,272 INFO L225 Difference]: With dead ends: 636 [2021-07-09 17:47:51,273 INFO L226 Difference]: Without dead ends: 606 [2021-07-09 17:47:51,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:47:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-07-09 17:47:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 486. [2021-07-09 17:47:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-07-09 17:47:51,283 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-07-09 17:47:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:51,283 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-07-09 17:47:51,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-07-09 17:47:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:47:51,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:51,285 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:51,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-09 17:47:51,501 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1700991628, now seen corresponding path program 31 times [2021-07-09 17:47:51,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:51,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895139812] [2021-07-09 17:47:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:51,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:51,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895139812] [2021-07-09 17:47:51,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895139812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:51,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100146184] [2021-07-09 17:47:51,566 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 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 [2021-07-09 17:47:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:51,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:51,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100146184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:51,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:51,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 17:47:51,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467461731] [2021-07-09 17:47:51,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:47:51,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:51,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:47:51,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:47:51,797 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:52,160 INFO L93 Difference]: Finished difference Result 604 states and 1468 transitions. [2021-07-09 17:47:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:47:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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 26 [2021-07-09 17:47:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:52,163 INFO L225 Difference]: With dead ends: 604 [2021-07-09 17:47:52,163 INFO L226 Difference]: Without dead ends: 574 [2021-07-09 17:47:52,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:47:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-07-09 17:47:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 486. [2021-07-09 17:47:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-07-09 17:47:52,171 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-07-09 17:47:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:52,172 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-07-09 17:47:52,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 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) [2021-07-09 17:47:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-07-09 17:47:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:52,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:52,173 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:52,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-07-09 17:47:52,397 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 638992838, now seen corresponding path program 5 times [2021-07-09 17:47:52,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:52,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105381398] [2021-07-09 17:47:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:52,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:52,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105381398] [2021-07-09 17:47:52,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105381398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:52,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036749286] [2021-07-09 17:47:52,507 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 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 [2021-07-09 17:47:52,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:47:52,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:47:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:52,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036749286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:52,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:52,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:52,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254912380] [2021-07-09 17:47:52,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:52,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:52,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:52,814 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:53,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:53,217 INFO L93 Difference]: Finished difference Result 554 states and 1340 transitions. [2021-07-09 17:47:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:47:53,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:47:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:53,220 INFO L225 Difference]: With dead ends: 554 [2021-07-09 17:47:53,220 INFO L226 Difference]: Without dead ends: 524 [2021-07-09 17:47:53,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:47:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-07-09 17:47:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 500. [2021-07-09 17:47:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.4549098196392785) internal successors, (1225), 499 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1225 transitions. [2021-07-09 17:47:53,228 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1225 transitions. Word has length 28 [2021-07-09 17:47:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:53,228 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1225 transitions. [2021-07-09 17:47:53,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1225 transitions. [2021-07-09 17:47:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:53,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:53,229 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:53,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:53,452 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash 808435006, now seen corresponding path program 32 times [2021-07-09 17:47:53,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:53,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190795281] [2021-07-09 17:47:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:53,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:53,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190795281] [2021-07-09 17:47:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190795281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:53,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447535227] [2021-07-09 17:47:53,572 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 [2021-07-09 17:47:53,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:53,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:53,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:47:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:53,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447535227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:53,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:53,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:53,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599580848] [2021-07-09 17:47:53,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:53,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:53,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:53,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:53,913 INFO L87 Difference]: Start difference. First operand 500 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:54,343 INFO L93 Difference]: Finished difference Result 650 states and 1584 transitions. [2021-07-09 17:47:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:47:54,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:47:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:54,346 INFO L225 Difference]: With dead ends: 650 [2021-07-09 17:47:54,346 INFO L226 Difference]: Without dead ends: 628 [2021-07-09 17:47:54,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:47:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-07-09 17:47:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 508. [2021-07-09 17:47:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.455621301775148) internal successors, (1245), 507 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1245 transitions. [2021-07-09 17:47:54,355 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1245 transitions. Word has length 28 [2021-07-09 17:47:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:54,355 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1245 transitions. [2021-07-09 17:47:54,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1245 transitions. [2021-07-09 17:47:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:54,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:54,357 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:54,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 17:47:54,573 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash -945290426, now seen corresponding path program 33 times [2021-07-09 17:47:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:54,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318979577] [2021-07-09 17:47:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:54,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318979577] [2021-07-09 17:47:54,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318979577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729202860] [2021-07-09 17:47:54,656 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 [2021-07-09 17:47:54,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:47:54,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:54,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:47:54,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:54,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729202860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:54,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:54,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:54,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77510365] [2021-07-09 17:47:54,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:54,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:54,915 INFO L87 Difference]: Start difference. First operand 508 states and 1245 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:55,413 INFO L93 Difference]: Finished difference Result 706 states and 1716 transitions. [2021-07-09 17:47:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:47:55,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:47:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:55,415 INFO L225 Difference]: With dead ends: 706 [2021-07-09 17:47:55,415 INFO L226 Difference]: Without dead ends: 668 [2021-07-09 17:47:55,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 590.4ms TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:47:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-09 17:47:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 556. [2021-07-09 17:47:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-07-09 17:47:55,423 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-07-09 17:47:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:55,423 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-07-09 17:47:55,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-07-09 17:47:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:55,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:55,424 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:55,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:55,642 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 282407170, now seen corresponding path program 34 times [2021-07-09 17:47:55,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:55,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824010569] [2021-07-09 17:47:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:55,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:55,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824010569] [2021-07-09 17:47:55,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824010569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:55,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456605648] [2021-07-09 17:47:55,735 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 [2021-07-09 17:47:55,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:47:55,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:55,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:47:55,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:56,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456605648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:56,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:56,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:56,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689601536] [2021-07-09 17:47:56,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:56,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:56,049 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:56,388 INFO L93 Difference]: Finished difference Result 674 states and 1636 transitions. [2021-07-09 17:47:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:47:56,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:47:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:56,390 INFO L225 Difference]: With dead ends: 674 [2021-07-09 17:47:56,390 INFO L226 Difference]: Without dead ends: 636 [2021-07-09 17:47:56,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:47:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-09 17:47:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 556. [2021-07-09 17:47:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-07-09 17:47:56,397 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-07-09 17:47:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:56,397 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-07-09 17:47:56,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-07-09 17:47:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:56,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:56,398 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:56,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-07-09 17:47:56,598 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash 470097470, now seen corresponding path program 35 times [2021-07-09 17:47:56,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:56,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882938010] [2021-07-09 17:47:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:56,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882938010] [2021-07-09 17:47:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882938010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365526384] [2021-07-09 17:47:56,692 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 [2021-07-09 17:47:56,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:47:56,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:47:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:57,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365526384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:57,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:57,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:57,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832292950] [2021-07-09 17:47:57,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:57,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:57,026 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:57,400 INFO L93 Difference]: Finished difference Result 714 states and 1740 transitions. [2021-07-09 17:47:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:47:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:47:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:57,406 INFO L225 Difference]: With dead ends: 714 [2021-07-09 17:47:57,406 INFO L226 Difference]: Without dead ends: 684 [2021-07-09 17:47:57,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 531.7ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:47:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-07-09 17:47:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 564. [2021-07-09 17:47:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-07-09 17:47:57,416 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-07-09 17:47:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:57,416 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-07-09 17:47:57,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-07-09 17:47:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:57,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:57,417 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:57,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:57,625 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash 264159038, now seen corresponding path program 36 times [2021-07-09 17:47:57,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:57,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764399485] [2021-07-09 17:47:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:57,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:57,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764399485] [2021-07-09 17:47:57,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764399485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:57,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268152715] [2021-07-09 17:47:57,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:47:57,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:47:57,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:47:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:58,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268152715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:58,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:58,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:58,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793356383] [2021-07-09 17:47:58,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:58,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:58,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:58,013 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:58,469 INFO L93 Difference]: Finished difference Result 722 states and 1760 transitions. [2021-07-09 17:47:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:47:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:47:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:58,473 INFO L225 Difference]: With dead ends: 722 [2021-07-09 17:47:58,473 INFO L226 Difference]: Without dead ends: 692 [2021-07-09 17:47:58,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:47:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-07-09 17:47:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 572. [2021-07-09 17:47:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.460595446584939) internal successors, (1405), 571 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1405 transitions. [2021-07-09 17:47:58,481 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1405 transitions. Word has length 28 [2021-07-09 17:47:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:58,481 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1405 transitions. [2021-07-09 17:47:58,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1405 transitions. [2021-07-09 17:47:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:58,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:58,482 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:58,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:47:58,683 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:58,683 INFO L82 PathProgramCache]: Analyzing trace with hash 451849338, now seen corresponding path program 37 times [2021-07-09 17:47:58,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:58,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931103950] [2021-07-09 17:47:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:58,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931103950] [2021-07-09 17:47:58,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931103950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730776438] [2021-07-09 17:47:58,770 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 [2021-07-09 17:47:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:47:58,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:59,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730776438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:59,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:59,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:59,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928369002] [2021-07-09 17:47:59,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:59,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:59,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:59,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:59,013 INFO L87 Difference]: Start difference. First operand 572 states and 1405 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:47:59,321 INFO L93 Difference]: Finished difference Result 658 states and 1604 transitions. [2021-07-09 17:47:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:47:59,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:47:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:47:59,323 INFO L225 Difference]: With dead ends: 658 [2021-07-09 17:47:59,323 INFO L226 Difference]: Without dead ends: 636 [2021-07-09 17:47:59,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:47:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-09 17:47:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 564. [2021-07-09 17:47:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:47:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-07-09 17:47:59,332 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-07-09 17:47:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:47:59,332 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-07-09 17:47:59,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:47:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-07-09 17:47:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:47:59,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:47:59,333 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:47:59,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-07-09 17:47:59,541 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:47:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:47:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash 280163074, now seen corresponding path program 38 times [2021-07-09 17:47:59,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:47:59,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309471281] [2021-07-09 17:47:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:47:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:47:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:59,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:47:59,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309471281] [2021-07-09 17:47:59,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309471281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:59,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941227277] [2021-07-09 17:47:59,668 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 [2021-07-09 17:47:59,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:47:59,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:47:59,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:47:59,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:47:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:47:59,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941227277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:47:59,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:47:59,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:47:59,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371103297] [2021-07-09 17:47:59,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:47:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:47:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:47:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:47:59,949 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:00,420 INFO L93 Difference]: Finished difference Result 786 states and 1916 transitions. [2021-07-09 17:48:00,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:48:00,420 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:00,423 INFO L225 Difference]: With dead ends: 786 [2021-07-09 17:48:00,423 INFO L226 Difference]: Without dead ends: 748 [2021-07-09 17:48:00,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 620.3ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:48:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-07-09 17:48:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 604. [2021-07-09 17:48:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.462686567164179) internal successors, (1485), 603 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1485 transitions. [2021-07-09 17:48:00,432 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1485 transitions. Word has length 28 [2021-07-09 17:48:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:00,432 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1485 transitions. [2021-07-09 17:48:00,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:00,432 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1485 transitions. [2021-07-09 17:48:00,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:00,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:00,433 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:00,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:00,634 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:00,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:00,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1539301438, now seen corresponding path program 39 times [2021-07-09 17:48:00,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:00,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951440369] [2021-07-09 17:48:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:00,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:00,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951440369] [2021-07-09 17:48:00,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951440369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:00,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453273633] [2021-07-09 17:48:00,731 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 [2021-07-09 17:48:00,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:48:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:00,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:01,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453273633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:01,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:01,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:01,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317706109] [2021-07-09 17:48:01,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:01,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:01,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:01,035 INFO L87 Difference]: Start difference. First operand 604 states and 1485 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:01,384 INFO L93 Difference]: Finished difference Result 754 states and 1840 transitions. [2021-07-09 17:48:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:01,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:01,396 INFO L225 Difference]: With dead ends: 754 [2021-07-09 17:48:01,396 INFO L226 Difference]: Without dead ends: 724 [2021-07-09 17:48:01,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-07-09 17:48:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 612. [2021-07-09 17:48:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-07-09 17:48:01,404 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-07-09 17:48:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:01,404 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-07-09 17:48:01,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-07-09 17:48:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:01,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:01,405 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:01,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-07-09 17:48:01,606 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:01,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1726991738, now seen corresponding path program 40 times [2021-07-09 17:48:01,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:01,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62298118] [2021-07-09 17:48:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:01,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:01,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62298118] [2021-07-09 17:48:01,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62298118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:01,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652490687] [2021-07-09 17:48:01,705 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 [2021-07-09 17:48:01,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:01,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:01,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:01,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652490687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:01,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:01,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:01,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762693712] [2021-07-09 17:48:01,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:01,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:01,966 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:02,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:02,290 INFO L93 Difference]: Finished difference Result 738 states and 1804 transitions. [2021-07-09 17:48:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:02,291 INFO L225 Difference]: With dead ends: 738 [2021-07-09 17:48:02,291 INFO L226 Difference]: Without dead ends: 716 [2021-07-09 17:48:02,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:48:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-07-09 17:48:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 588. [2021-07-09 17:48:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4616695059625213) internal successors, (1445), 587 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1445 transitions. [2021-07-09 17:48:02,299 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1445 transitions. Word has length 28 [2021-07-09 17:48:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:02,299 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1445 transitions. [2021-07-09 17:48:02,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1445 transitions. [2021-07-09 17:48:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:02,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:02,300 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:02,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:02,502 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1175543362, now seen corresponding path program 41 times [2021-07-09 17:48:02,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:02,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051910366] [2021-07-09 17:48:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:02,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:02,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051910366] [2021-07-09 17:48:02,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051910366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:02,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649255340] [2021-07-09 17:48:02,627 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 [2021-07-09 17:48:02,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:48:02,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:02,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:02,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649255340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:02,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:02,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:02,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881841180] [2021-07-09 17:48:02,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:02,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:02,989 INFO L87 Difference]: Start difference. First operand 588 states and 1445 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:03,513 INFO L93 Difference]: Finished difference Result 746 states and 1824 transitions. [2021-07-09 17:48:03,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:03,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:03,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:03,515 INFO L225 Difference]: With dead ends: 746 [2021-07-09 17:48:03,515 INFO L226 Difference]: Without dead ends: 724 [2021-07-09 17:48:03,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-07-09 17:48:03,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 620. [2021-07-09 17:48:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4636510500807756) internal successors, (1525), 619 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1525 transitions. [2021-07-09 17:48:03,524 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1525 transitions. Word has length 28 [2021-07-09 17:48:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:03,524 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1525 transitions. [2021-07-09 17:48:03,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1525 transitions. [2021-07-09 17:48:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:03,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:03,525 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:03,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:03,741 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1388654202, now seen corresponding path program 42 times [2021-07-09 17:48:03,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:03,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980508444] [2021-07-09 17:48:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:03,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:03,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980508444] [2021-07-09 17:48:03,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980508444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:03,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752967860] [2021-07-09 17:48:03,846 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 [2021-07-09 17:48:03,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:48:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:03,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:03,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752967860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:04,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:04,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:04,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54886748] [2021-07-09 17:48:04,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:04,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:04,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:04,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:04,169 INFO L87 Difference]: Start difference. First operand 620 states and 1525 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:04,599 INFO L93 Difference]: Finished difference Result 770 states and 1884 transitions. [2021-07-09 17:48:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:04,601 INFO L225 Difference]: With dead ends: 770 [2021-07-09 17:48:04,601 INFO L226 Difference]: Without dead ends: 748 [2021-07-09 17:48:04,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 604.3ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-07-09 17:48:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 612. [2021-07-09 17:48:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-07-09 17:48:04,611 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-07-09 17:48:04,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:04,611 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-07-09 17:48:04,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-07-09 17:48:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:04,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:04,613 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:04,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-07-09 17:48:04,836 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:04,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:04,836 INFO L82 PathProgramCache]: Analyzing trace with hash -238558138, now seen corresponding path program 43 times [2021-07-09 17:48:04,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:04,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217881495] [2021-07-09 17:48:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:04,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:04,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217881495] [2021-07-09 17:48:04,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217881495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:04,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547378024] [2021-07-09 17:48:04,973 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 [2021-07-09 17:48:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547378024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:05,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:05,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:05,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055167759] [2021-07-09 17:48:05,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:05,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:05,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:05,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:05,268 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:05,850 INFO L93 Difference]: Finished difference Result 746 states and 1820 transitions. [2021-07-09 17:48:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:48:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:05,852 INFO L225 Difference]: With dead ends: 746 [2021-07-09 17:48:05,852 INFO L226 Difference]: Without dead ends: 716 [2021-07-09 17:48:05,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 758.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:48:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-07-09 17:48:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 660. [2021-07-09 17:48:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:05,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-07-09 17:48:05,860 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-07-09 17:48:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:05,860 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-07-09 17:48:05,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-07-09 17:48:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:05,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:05,862 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:06,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-07-09 17:48:06,066 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498818, now seen corresponding path program 44 times [2021-07-09 17:48:06,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:06,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618259955] [2021-07-09 17:48:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:06,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618259955] [2021-07-09 17:48:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618259955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704022918] [2021-07-09 17:48:06,189 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 [2021-07-09 17:48:06,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:06,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704022918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:06,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:06,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:06,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327731936] [2021-07-09 17:48:06,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:06,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:06,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:06,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:06,495 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:06,810 INFO L93 Difference]: Finished difference Result 786 states and 1920 transitions. [2021-07-09 17:48:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:06,811 INFO L225 Difference]: With dead ends: 786 [2021-07-09 17:48:06,811 INFO L226 Difference]: Without dead ends: 756 [2021-07-09 17:48:06,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-07-09 17:48:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 660. [2021-07-09 17:48:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-07-09 17:48:06,819 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-07-09 17:48:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:06,819 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-07-09 17:48:06,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-07-09 17:48:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:06,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:06,820 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:07,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:07,021 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:07,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:07,021 INFO L82 PathProgramCache]: Analyzing trace with hash 170623678, now seen corresponding path program 45 times [2021-07-09 17:48:07,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:07,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858957921] [2021-07-09 17:48:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:07,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858957921] [2021-07-09 17:48:07,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858957921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704263304] [2021-07-09 17:48:07,113 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 [2021-07-09 17:48:07,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:48:07,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:07,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704263304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:07,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:07,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:07,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044714761] [2021-07-09 17:48:07,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:07,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:07,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:07,435 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:07,885 INFO L93 Difference]: Finished difference Result 810 states and 1984 transitions. [2021-07-09 17:48:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:07,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:07,887 INFO L225 Difference]: With dead ends: 810 [2021-07-09 17:48:07,887 INFO L226 Difference]: Without dead ends: 788 [2021-07-09 17:48:07,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-07-09 17:48:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-07-09 17:48:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.4662668665667167) internal successors, (1645), 667 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1645 transitions. [2021-07-09 17:48:07,897 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1645 transitions. Word has length 28 [2021-07-09 17:48:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:07,897 INFO L482 AbstractCegarLoop]: Abstraction has 668 states and 1645 transitions. [2021-07-09 17:48:07,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1645 transitions. [2021-07-09 17:48:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:07,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:07,899 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:08,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-07-09 17:48:08,117 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1578394186, now seen corresponding path program 46 times [2021-07-09 17:48:08,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:08,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492217421] [2021-07-09 17:48:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:08,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:08,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492217421] [2021-07-09 17:48:08,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492217421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:08,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058835953] [2021-07-09 17:48:08,281 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 [2021-07-09 17:48:08,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:08,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:08,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:08,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058835953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:08,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:08,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:08,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809953989] [2021-07-09 17:48:08,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:08,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:08,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:08,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:08,614 INFO L87 Difference]: Start difference. First operand 668 states and 1645 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:09,041 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-07-09 17:48:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:09,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:09,043 INFO L225 Difference]: With dead ends: 794 [2021-07-09 17:48:09,043 INFO L226 Difference]: Without dead ends: 756 [2021-07-09 17:48:09,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 675.0ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-07-09 17:48:09,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 684. [2021-07-09 17:48:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-07-09 17:48:09,050 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-07-09 17:48:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:09,051 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-07-09 17:48:09,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-07-09 17:48:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:09,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:09,051 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:09,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-07-09 17:48:09,252 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1445766078, now seen corresponding path program 47 times [2021-07-09 17:48:09,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:09,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578149834] [2021-07-09 17:48:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:09,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:09,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578149834] [2021-07-09 17:48:09,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578149834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:09,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45512553] [2021-07-09 17:48:09,360 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 [2021-07-09 17:48:09,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:48:09,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:09,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45512553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:09,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:09,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:09,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474602646] [2021-07-09 17:48:09,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:09,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:09,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:09,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:09,725 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:10,086 INFO L93 Difference]: Finished difference Result 802 states and 1964 transitions. [2021-07-09 17:48:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:10,087 INFO L225 Difference]: With dead ends: 802 [2021-07-09 17:48:10,087 INFO L226 Difference]: Without dead ends: 780 [2021-07-09 17:48:10,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-07-09 17:48:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 692. [2021-07-09 17:48:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-07-09 17:48:10,094 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-07-09 17:48:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:10,094 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-07-09 17:48:10,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-07-09 17:48:10,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:10,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:10,095 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:10,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-09 17:48:10,296 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:10,296 INFO L82 PathProgramCache]: Analyzing trace with hash -285003654, now seen corresponding path program 48 times [2021-07-09 17:48:10,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:10,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878265499] [2021-07-09 17:48:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:10,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:10,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878265499] [2021-07-09 17:48:10,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878265499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:10,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359386857] [2021-07-09 17:48:10,388 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 [2021-07-09 17:48:10,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:48:10,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:10,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:10,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:10,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359386857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:10,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:10,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:10,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578967278] [2021-07-09 17:48:10,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:10,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:10,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:10,727 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:11,157 INFO L93 Difference]: Finished difference Result 834 states and 2044 transitions. [2021-07-09 17:48:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:11,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:11,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:11,159 INFO L225 Difference]: With dead ends: 834 [2021-07-09 17:48:11,159 INFO L226 Difference]: Without dead ends: 812 [2021-07-09 17:48:11,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 610.3ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-09 17:48:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 684. [2021-07-09 17:48:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-07-09 17:48:11,170 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-07-09 17:48:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:11,170 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-07-09 17:48:11,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-07-09 17:48:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:11,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:11,171 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:11,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:11,385 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash -303251786, now seen corresponding path program 49 times [2021-07-09 17:48:11,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:11,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709312510] [2021-07-09 17:48:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:11,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709312510] [2021-07-09 17:48:11,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709312510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982310195] [2021-07-09 17:48:11,510 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 [2021-07-09 17:48:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:11,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:11,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982310195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:11,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:11,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:11,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666529409] [2021-07-09 17:48:11,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:11,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:11,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:11,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:11,852 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:12,270 INFO L93 Difference]: Finished difference Result 826 states and 2016 transitions. [2021-07-09 17:48:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:12,272 INFO L225 Difference]: With dead ends: 826 [2021-07-09 17:48:12,272 INFO L226 Difference]: Without dead ends: 788 [2021-07-09 17:48:12,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 644.5ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-07-09 17:48:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 684. [2021-07-09 17:48:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-07-09 17:48:12,279 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-07-09 17:48:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:12,279 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-07-09 17:48:12,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-07-09 17:48:12,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:12,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:12,280 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:12,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:12,481 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:12,483 INFO L82 PathProgramCache]: Analyzing trace with hash -829279622, now seen corresponding path program 50 times [2021-07-09 17:48:12,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:12,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095021796] [2021-07-09 17:48:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:12,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:12,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095021796] [2021-07-09 17:48:12,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095021796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:12,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508226847] [2021-07-09 17:48:12,563 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 [2021-07-09 17:48:12,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:12,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508226847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:12,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:12,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:12,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014825900] [2021-07-09 17:48:12,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:12,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:12,805 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:13,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:13,092 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-07-09 17:48:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:48:13,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:13,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:13,093 INFO L225 Difference]: With dead ends: 794 [2021-07-09 17:48:13,093 INFO L226 Difference]: Without dead ends: 756 [2021-07-09 17:48:13,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:48:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-07-09 17:48:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 692. [2021-07-09 17:48:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-07-09 17:48:13,101 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-07-09 17:48:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:13,101 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-07-09 17:48:13,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-07-09 17:48:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:13,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:13,102 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:13,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:13,302 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash -641589322, now seen corresponding path program 51 times [2021-07-09 17:48:13,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:13,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776166292] [2021-07-09 17:48:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:13,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:13,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776166292] [2021-07-09 17:48:13,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776166292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:13,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332295111] [2021-07-09 17:48:13,391 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 [2021-07-09 17:48:13,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:48:13,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:13,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332295111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:13,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:13,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:13,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014042552] [2021-07-09 17:48:13,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:13,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:13,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:13,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:13,701 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:14,211 INFO L93 Difference]: Finished difference Result 842 states and 2052 transitions. [2021-07-09 17:48:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:14,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:14,212 INFO L225 Difference]: With dead ends: 842 [2021-07-09 17:48:14,212 INFO L226 Difference]: Without dead ends: 796 [2021-07-09 17:48:14,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 595.3ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-07-09 17:48:14,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 708. [2021-07-09 17:48:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.468175388967468) internal successors, (1745), 707 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1745 transitions. [2021-07-09 17:48:14,220 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1745 transitions. Word has length 28 [2021-07-09 17:48:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:14,220 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 1745 transitions. [2021-07-09 17:48:14,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1745 transitions. [2021-07-09 17:48:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:14,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:14,221 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:14,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-07-09 17:48:14,443 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:14,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:14,444 INFO L82 PathProgramCache]: Analyzing trace with hash -322191042, now seen corresponding path program 52 times [2021-07-09 17:48:14,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:14,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640627894] [2021-07-09 17:48:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:14,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:14,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640627894] [2021-07-09 17:48:14,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640627894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:14,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995147278] [2021-07-09 17:48:14,539 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 [2021-07-09 17:48:14,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:14,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:14,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:14,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995147278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:14,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:14,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:14,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091740168] [2021-07-09 17:48:14,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:14,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:14,819 INFO L87 Difference]: Start difference. First operand 708 states and 1745 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:15,132 INFO L93 Difference]: Finished difference Result 818 states and 2004 transitions. [2021-07-09 17:48:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:15,140 INFO L225 Difference]: With dead ends: 818 [2021-07-09 17:48:15,140 INFO L226 Difference]: Without dead ends: 796 [2021-07-09 17:48:15,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-07-09 17:48:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 716. [2021-07-09 17:48:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-07-09 17:48:15,151 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-07-09 17:48:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:15,151 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-07-09 17:48:15,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-07-09 17:48:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:15,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:15,153 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:15,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:15,375 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash -528129474, now seen corresponding path program 53 times [2021-07-09 17:48:15,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:15,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563460066] [2021-07-09 17:48:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:15,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:15,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563460066] [2021-07-09 17:48:15,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563460066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:15,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640832771] [2021-07-09 17:48:15,477 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 [2021-07-09 17:48:15,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:48:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:15,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:15,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640832771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:15,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:15,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:15,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382151881] [2021-07-09 17:48:15,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:15,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:15,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:15,772 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:16,133 INFO L93 Difference]: Finished difference Result 850 states and 2080 transitions. [2021-07-09 17:48:16,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:16,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:16,135 INFO L225 Difference]: With dead ends: 850 [2021-07-09 17:48:16,135 INFO L226 Difference]: Without dead ends: 820 [2021-07-09 17:48:16,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-09 17:48:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 716. [2021-07-09 17:48:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-07-09 17:48:16,146 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-07-09 17:48:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:16,146 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-07-09 17:48:16,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-07-09 17:48:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:16,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:16,148 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:16,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:16,370 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:16,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1051993022, now seen corresponding path program 54 times [2021-07-09 17:48:16,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:16,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26677235] [2021-07-09 17:48:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:16,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:16,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26677235] [2021-07-09 17:48:16,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26677235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:16,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797944949] [2021-07-09 17:48:16,460 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 [2021-07-09 17:48:16,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:48:16,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:16,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797944949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:16,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:16,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421325373] [2021-07-09 17:48:16,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:16,812 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:17,243 INFO L93 Difference]: Finished difference Result 866 states and 2120 transitions. [2021-07-09 17:48:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:17,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:17,245 INFO L225 Difference]: With dead ends: 866 [2021-07-09 17:48:17,245 INFO L226 Difference]: Without dead ends: 836 [2021-07-09 17:48:17,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-07-09 17:48:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 732. [2021-07-09 17:48:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-07-09 17:48:17,255 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-07-09 17:48:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:17,255 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-07-09 17:48:17,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-07-09 17:48:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:17,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:17,256 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:17,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:17,474 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -678776710, now seen corresponding path program 55 times [2021-07-09 17:48:17,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:17,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984917941] [2021-07-09 17:48:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:17,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:17,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984917941] [2021-07-09 17:48:17,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984917941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:17,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892834421] [2021-07-09 17:48:17,574 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 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 [2021-07-09 17:48:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:17,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:17,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892834421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:17,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:17,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:17,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591446150] [2021-07-09 17:48:17,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:17,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:17,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:17,931 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:18,265 INFO L93 Difference]: Finished difference Result 890 states and 2184 transitions. [2021-07-09 17:48:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:18,267 INFO L225 Difference]: With dead ends: 890 [2021-07-09 17:48:18,267 INFO L226 Difference]: Without dead ends: 868 [2021-07-09 17:48:18,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-07-09 17:48:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 732. [2021-07-09 17:48:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-07-09 17:48:18,278 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-07-09 17:48:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:18,278 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-07-09 17:48:18,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-07-09 17:48:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:18,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:18,280 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:18,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:18,493 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash -884715142, now seen corresponding path program 56 times [2021-07-09 17:48:18,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:18,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598360256] [2021-07-09 17:48:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:18,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:18,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598360256] [2021-07-09 17:48:18,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598360256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:18,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24348628] [2021-07-09 17:48:18,645 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 [2021-07-09 17:48:18,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:18,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:18,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:18,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24348628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:18,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:18,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:18,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912229764] [2021-07-09 17:48:18,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:18,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:18,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:18,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:18,946 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:19,318 INFO L93 Difference]: Finished difference Result 882 states and 2156 transitions. [2021-07-09 17:48:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:48:19,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:19,321 INFO L225 Difference]: With dead ends: 882 [2021-07-09 17:48:19,321 INFO L226 Difference]: Without dead ends: 844 [2021-07-09 17:48:19,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 563.3ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:48:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-07-09 17:48:19,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 748. [2021-07-09 17:48:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-07-09 17:48:19,331 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-07-09 17:48:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:19,332 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-07-09 17:48:19,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-07-09 17:48:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:19,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:19,333 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:19,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:19,557 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash -697024842, now seen corresponding path program 57 times [2021-07-09 17:48:19,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:19,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348994128] [2021-07-09 17:48:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:19,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:19,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348994128] [2021-07-09 17:48:19,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348994128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:19,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419314782] [2021-07-09 17:48:19,674 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 [2021-07-09 17:48:19,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:48:19,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:19,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:19,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419314782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:19,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:19,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:19,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245061649] [2021-07-09 17:48:19,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:19,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:19,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:19,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:19,987 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:20,372 INFO L93 Difference]: Finished difference Result 898 states and 2192 transitions. [2021-07-09 17:48:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:20,374 INFO L225 Difference]: With dead ends: 898 [2021-07-09 17:48:20,374 INFO L226 Difference]: Without dead ends: 852 [2021-07-09 17:48:20,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-07-09 17:48:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 748. [2021-07-09 17:48:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-07-09 17:48:20,382 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-07-09 17:48:20,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:20,382 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-07-09 17:48:20,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-07-09 17:48:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:20,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:20,383 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:20,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-07-09 17:48:20,583 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1967831874, now seen corresponding path program 58 times [2021-07-09 17:48:20,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:20,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239289345] [2021-07-09 17:48:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:20,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239289345] [2021-07-09 17:48:20,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239289345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:20,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665078052] [2021-07-09 17:48:20,670 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 [2021-07-09 17:48:20,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:20,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:20,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:21,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665078052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:21,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:21,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:21,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470478368] [2021-07-09 17:48:21,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:21,011 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:21,411 INFO L93 Difference]: Finished difference Result 874 states and 2144 transitions. [2021-07-09 17:48:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:21,413 INFO L225 Difference]: With dead ends: 874 [2021-07-09 17:48:21,413 INFO L226 Difference]: Without dead ends: 852 [2021-07-09 17:48:21,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-07-09 17:48:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 740. [2021-07-09 17:48:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.469553450608931) internal successors, (1825), 739 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1825 transitions. [2021-07-09 17:48:21,424 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1825 transitions. Word has length 28 [2021-07-09 17:48:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:21,424 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1825 transitions. [2021-07-09 17:48:21,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1825 transitions. [2021-07-09 17:48:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:21,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:21,426 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:21,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-07-09 17:48:21,641 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:21,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1175607874, now seen corresponding path program 59 times [2021-07-09 17:48:21,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:21,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740357722] [2021-07-09 17:48:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:21,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:21,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740357722] [2021-07-09 17:48:21,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740357722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:21,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384714192] [2021-07-09 17:48:21,766 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 [2021-07-09 17:48:21,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:48:21,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:22,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384714192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:22,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:22,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:22,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214238404] [2021-07-09 17:48:22,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:22,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:22,056 INFO L87 Difference]: Start difference. First operand 740 states and 1825 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:22,486 INFO L93 Difference]: Finished difference Result 858 states and 2100 transitions. [2021-07-09 17:48:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:22,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:22,488 INFO L225 Difference]: With dead ends: 858 [2021-07-09 17:48:22,488 INFO L226 Difference]: Without dead ends: 828 [2021-07-09 17:48:22,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:48:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-09 17:48:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 716. [2021-07-09 17:48:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-07-09 17:48:22,498 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-07-09 17:48:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:22,499 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-07-09 17:48:22,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-07-09 17:48:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:22,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:22,500 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:22,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-07-09 17:48:22,713 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1970549754, now seen corresponding path program 60 times [2021-07-09 17:48:22,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:22,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487396381] [2021-07-09 17:48:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:22,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487396381] [2021-07-09 17:48:22,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487396381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032744208] [2021-07-09 17:48:22,830 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 [2021-07-09 17:48:22,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:48:22,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:23,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032744208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:23,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:23,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:23,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669145936] [2021-07-09 17:48:23,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:23,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:23,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:23,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:23,102 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:23,539 INFO L93 Difference]: Finished difference Result 918 states and 2183 transitions. [2021-07-09 17:48:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:48:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:23,541 INFO L225 Difference]: With dead ends: 918 [2021-07-09 17:48:23,541 INFO L226 Difference]: Without dead ends: 888 [2021-07-09 17:48:23,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:48:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-07-09 17:48:23,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 716. [2021-07-09 17:48:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-07-09 17:48:23,553 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-07-09 17:48:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:23,553 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-07-09 17:48:23,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-07-09 17:48:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:23,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:23,554 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:23,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:23,755 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash 221531890, now seen corresponding path program 61 times [2021-07-09 17:48:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:23,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038767076] [2021-07-09 17:48:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:23,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:23,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038767076] [2021-07-09 17:48:23,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038767076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:23,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454423296] [2021-07-09 17:48:23,848 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 [2021-07-09 17:48:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:23,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:24,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454423296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:24,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:24,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:24,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908917754] [2021-07-09 17:48:24,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:24,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:24,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:24,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:24,106 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:24,443 INFO L93 Difference]: Finished difference Result 770 states and 1876 transitions. [2021-07-09 17:48:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:24,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:24,445 INFO L225 Difference]: With dead ends: 770 [2021-07-09 17:48:24,445 INFO L226 Difference]: Without dead ends: 748 [2021-07-09 17:48:24,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:48:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-07-09 17:48:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2021-07-09 17:48:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-07-09 17:48:24,451 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-07-09 17:48:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:24,451 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-07-09 17:48:24,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-07-09 17:48:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:24,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:24,452 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:24,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-07-09 17:48:24,653 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1754842430, now seen corresponding path program 62 times [2021-07-09 17:48:24,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:24,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728669385] [2021-07-09 17:48:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:24,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:24,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728669385] [2021-07-09 17:48:24,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728669385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:24,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491020161] [2021-07-09 17:48:24,762 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 [2021-07-09 17:48:24,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:24,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:24,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:25,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491020161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:25,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:25,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:25,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439952122] [2021-07-09 17:48:25,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:25,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:25,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:25,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:25,006 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:25,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:25,580 INFO L93 Difference]: Finished difference Result 874 states and 2132 transitions. [2021-07-09 17:48:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:48:25,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:25,582 INFO L225 Difference]: With dead ends: 874 [2021-07-09 17:48:25,582 INFO L226 Difference]: Without dead ends: 844 [2021-07-09 17:48:25,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:48:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-07-09 17:48:25,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 724. [2021-07-09 17:48:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:25,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-07-09 17:48:25,589 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-07-09 17:48:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:25,589 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-07-09 17:48:25,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-07-09 17:48:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:25,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:25,590 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:25,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:25,790 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1924284598, now seen corresponding path program 63 times [2021-07-09 17:48:25,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:25,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334144500] [2021-07-09 17:48:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:25,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334144500] [2021-07-09 17:48:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334144500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582272827] [2021-07-09 17:48:25,889 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 [2021-07-09 17:48:25,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:48:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582272827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:26,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:26,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:26,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729011905] [2021-07-09 17:48:26,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:26,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:26,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:26,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:26,202 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:26,670 INFO L93 Difference]: Finished difference Result 914 states and 2224 transitions. [2021-07-09 17:48:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:26,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:26,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:26,671 INFO L225 Difference]: With dead ends: 914 [2021-07-09 17:48:26,671 INFO L226 Difference]: Without dead ends: 868 [2021-07-09 17:48:26,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 644.7ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:48:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-07-09 17:48:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 716. [2021-07-09 17:48:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-07-09 17:48:26,679 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-07-09 17:48:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:26,679 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-07-09 17:48:26,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-07-09 17:48:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:26,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:26,680 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:26,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable726 [2021-07-09 17:48:26,880 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:26,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:26,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1398256762, now seen corresponding path program 64 times [2021-07-09 17:48:26,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:26,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452710389] [2021-07-09 17:48:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:26,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452710389] [2021-07-09 17:48:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452710389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131127840] [2021-07-09 17:48:26,957 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 [2021-07-09 17:48:26,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:26,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:27,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131127840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:27,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:27,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:27,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170328285] [2021-07-09 17:48:27,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:27,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:27,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:27,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:27,226 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:27,503 INFO L93 Difference]: Finished difference Result 866 states and 2108 transitions. [2021-07-09 17:48:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:48:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:27,504 INFO L225 Difference]: With dead ends: 866 [2021-07-09 17:48:27,505 INFO L226 Difference]: Without dead ends: 828 [2021-07-09 17:48:27,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:48:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-09 17:48:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 732. [2021-07-09 17:48:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.4582763337893296) internal successors, (1797), 731 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1797 transitions. [2021-07-09 17:48:27,512 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1797 transitions. Word has length 28 [2021-07-09 17:48:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:27,512 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1797 transitions. [2021-07-09 17:48:27,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1797 transitions. [2021-07-09 17:48:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:27,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:27,513 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:27,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-07-09 17:48:27,713 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:27,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1585947062, now seen corresponding path program 65 times [2021-07-09 17:48:27,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:27,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685885951] [2021-07-09 17:48:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:27,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:27,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685885951] [2021-07-09 17:48:27,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685885951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:27,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403990418] [2021-07-09 17:48:27,793 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 [2021-07-09 17:48:27,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:48:27,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:28,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403990418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:28,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:28,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:28,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989834498] [2021-07-09 17:48:28,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:28,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:28,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:28,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:28,107 INFO L87 Difference]: Start difference. First operand 732 states and 1797 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:28,550 INFO L93 Difference]: Finished difference Result 930 states and 2264 transitions. [2021-07-09 17:48:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:28,551 INFO L225 Difference]: With dead ends: 930 [2021-07-09 17:48:28,551 INFO L226 Difference]: Without dead ends: 884 [2021-07-09 17:48:28,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-09 17:48:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 740. [2021-07-09 17:48:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-07-09 17:48:28,560 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-07-09 17:48:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:28,560 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-07-09 17:48:28,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-07-09 17:48:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:28,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:28,561 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:28,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-07-09 17:48:28,761 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash 120870266, now seen corresponding path program 66 times [2021-07-09 17:48:28,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:28,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485186458] [2021-07-09 17:48:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:28,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:28,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485186458] [2021-07-09 17:48:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485186458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:28,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654137664] [2021-07-09 17:48:28,849 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 [2021-07-09 17:48:28,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:48:28,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:28,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:28,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:29,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654137664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:29,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:29,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:29,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522741929] [2021-07-09 17:48:29,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:29,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:29,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:29,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:29,111 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:29,463 INFO L93 Difference]: Finished difference Result 866 states and 2112 transitions. [2021-07-09 17:48:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:29,464 INFO L225 Difference]: With dead ends: 866 [2021-07-09 17:48:29,464 INFO L226 Difference]: Without dead ends: 836 [2021-07-09 17:48:29,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-07-09 17:48:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 740. [2021-07-09 17:48:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-07-09 17:48:29,471 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-07-09 17:48:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:29,471 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-07-09 17:48:29,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-07-09 17:48:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:29,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:29,472 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:29,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:29,673 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1433877834, now seen corresponding path program 67 times [2021-07-09 17:48:29,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:29,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132352170] [2021-07-09 17:48:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:29,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:29,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132352170] [2021-07-09 17:48:29,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132352170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:29,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614903549] [2021-07-09 17:48:29,746 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 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 [2021-07-09 17:48:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:29,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:30,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614903549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:30,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:30,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881940828] [2021-07-09 17:48:30,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:30,003 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:30,402 INFO L93 Difference]: Finished difference Result 882 states and 2148 transitions. [2021-07-09 17:48:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:30,403 INFO L225 Difference]: With dead ends: 882 [2021-07-09 17:48:30,403 INFO L226 Difference]: Without dead ends: 844 [2021-07-09 17:48:30,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-07-09 17:48:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 740. [2021-07-09 17:48:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-07-09 17:48:30,411 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-07-09 17:48:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:30,411 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-07-09 17:48:30,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-07-09 17:48:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:30,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:30,412 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:30,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:30,612 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1396012666, now seen corresponding path program 68 times [2021-07-09 17:48:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:30,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454848396] [2021-07-09 17:48:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:30,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454848396] [2021-07-09 17:48:30,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454848396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220317150] [2021-07-09 17:48:30,704 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 [2021-07-09 17:48:30,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:30,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:30,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:30,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220317150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:30,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:30,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:30,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343493337] [2021-07-09 17:48:30,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:30,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:30,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:30,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:30,968 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:31,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:31,438 INFO L93 Difference]: Finished difference Result 890 states and 2172 transitions. [2021-07-09 17:48:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:31,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:31,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:31,440 INFO L225 Difference]: With dead ends: 890 [2021-07-09 17:48:31,440 INFO L226 Difference]: Without dead ends: 860 [2021-07-09 17:48:31,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:31,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-07-09 17:48:31,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 748. [2021-07-09 17:48:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.459170013386881) internal successors, (1837), 747 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1837 transitions. [2021-07-09 17:48:31,447 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1837 transitions. Word has length 28 [2021-07-09 17:48:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:31,447 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1837 transitions. [2021-07-09 17:48:31,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1837 transitions. [2021-07-09 17:48:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:31,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:31,448 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:31,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:31,649 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:31,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1639816266, now seen corresponding path program 69 times [2021-07-09 17:48:31,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:31,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950689498] [2021-07-09 17:48:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:31,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950689498] [2021-07-09 17:48:31,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950689498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192528182] [2021-07-09 17:48:31,738 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 [2021-07-09 17:48:31,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:48:31,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:31,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:31,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192528182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:31,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:31,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:31,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388252316] [2021-07-09 17:48:31,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:31,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:31,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:31,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:31,965 INFO L87 Difference]: Start difference. First operand 748 states and 1837 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:32,309 INFO L93 Difference]: Finished difference Result 882 states and 2152 transitions. [2021-07-09 17:48:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:48:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:32,310 INFO L225 Difference]: With dead ends: 882 [2021-07-09 17:48:32,310 INFO L226 Difference]: Without dead ends: 852 [2021-07-09 17:48:32,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:48:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-07-09 17:48:32,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 756. [2021-07-09 17:48:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.4596026490066225) internal successors, (1857), 755 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1857 transitions. [2021-07-09 17:48:32,318 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1857 transitions. Word has length 28 [2021-07-09 17:48:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:32,318 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1857 transitions. [2021-07-09 17:48:32,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1857 transitions. [2021-07-09 17:48:32,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:32,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:32,319 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:32,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:32,520 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1452125966, now seen corresponding path program 70 times [2021-07-09 17:48:32,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:32,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946452835] [2021-07-09 17:48:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:32,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:32,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946452835] [2021-07-09 17:48:32,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946452835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:32,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940719026] [2021-07-09 17:48:32,615 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 [2021-07-09 17:48:32,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:32,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:32,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:32,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:32,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940719026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:32,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:32,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:32,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73779381] [2021-07-09 17:48:32,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:32,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:32,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:32,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:32,892 INFO L87 Difference]: Start difference. First operand 756 states and 1857 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:33,165 INFO L93 Difference]: Finished difference Result 834 states and 2032 transitions. [2021-07-09 17:48:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:48:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:33,166 INFO L225 Difference]: With dead ends: 834 [2021-07-09 17:48:33,167 INFO L226 Difference]: Without dead ends: 804 [2021-07-09 17:48:33,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:48:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-07-09 17:48:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 764. [2021-07-09 17:48:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.4600262123197902) internal successors, (1877), 763 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1877 transitions. [2021-07-09 17:48:33,183 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1877 transitions. Word has length 28 [2021-07-09 17:48:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:33,183 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 1877 transitions. [2021-07-09 17:48:33,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1877 transitions. [2021-07-09 17:48:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:33,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:33,184 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:33,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:33,400 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:33,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:33,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1978153802, now seen corresponding path program 71 times [2021-07-09 17:48:33,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:33,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467805425] [2021-07-09 17:48:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:33,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:33,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467805425] [2021-07-09 17:48:33,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467805425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:33,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069489674] [2021-07-09 17:48:33,605 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 [2021-07-09 17:48:33,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:48:33,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:33,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069489674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:33,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:33,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:33,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66695993] [2021-07-09 17:48:33,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:33,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:33,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:33,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:33,824 INFO L87 Difference]: Start difference. First operand 764 states and 1877 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:34,207 INFO L93 Difference]: Finished difference Result 938 states and 2292 transitions. [2021-07-09 17:48:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:48:34,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:34,209 INFO L225 Difference]: With dead ends: 938 [2021-07-09 17:48:34,209 INFO L226 Difference]: Without dead ends: 908 [2021-07-09 17:48:34,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:48:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-07-09 17:48:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 780. [2021-07-09 17:48:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-07-09 17:48:34,220 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-07-09 17:48:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:34,220 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-07-09 17:48:34,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-07-09 17:48:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 17:48:34,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:34,221 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:34,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:34,422 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash -59693770, now seen corresponding path program 72 times [2021-07-09 17:48:34,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:34,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996364576] [2021-07-09 17:48:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:34,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:34,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996364576] [2021-07-09 17:48:34,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996364576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:34,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341599262] [2021-07-09 17:48:34,518 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 [2021-07-09 17:48:34,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:48:34,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:34,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:48:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:34,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341599262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:34,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:34,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 17:48:34,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578150945] [2021-07-09 17:48:34,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:48:34,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:34,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:48:34,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:48:34,790 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:35,215 INFO L93 Difference]: Finished difference Result 890 states and 2176 transitions. [2021-07-09 17:48:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-07-09 17:48:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:35,217 INFO L225 Difference]: With dead ends: 890 [2021-07-09 17:48:35,217 INFO L226 Difference]: Without dead ends: 868 [2021-07-09 17:48:35,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-07-09 17:48:35,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 780. [2021-07-09 17:48:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-07-09 17:48:35,225 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-07-09 17:48:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-07-09 17:48:35,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-07-09 17:48:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-07-09 17:48:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:35,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:35,226 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:35,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:35,427 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash -798364280, now seen corresponding path program 73 times [2021-07-09 17:48:35,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:35,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666262759] [2021-07-09 17:48:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:35,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:35,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666262759] [2021-07-09 17:48:35,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666262759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:35,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313075413] [2021-07-09 17:48:35,567 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 [2021-07-09 17:48:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:35,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:35,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313075413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:35,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:35,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:35,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353263522] [2021-07-09 17:48:35,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:35,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:35,891 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:36,401 INFO L93 Difference]: Finished difference Result 1016 states and 2430 transitions. [2021-07-09 17:48:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:48:36,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:36,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:36,406 INFO L225 Difference]: With dead ends: 1016 [2021-07-09 17:48:36,406 INFO L226 Difference]: Without dead ends: 994 [2021-07-09 17:48:36,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:48:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-09 17:48:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 824. [2021-07-09 17:48:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.4702308626974485) internal successors, (2033), 823 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2033 transitions. [2021-07-09 17:48:36,418 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2033 transitions. Word has length 30 [2021-07-09 17:48:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:36,418 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2033 transitions. [2021-07-09 17:48:36,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2033 transitions. [2021-07-09 17:48:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:36,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:36,419 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:36,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-07-09 17:48:36,633 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1559894852, now seen corresponding path program 74 times [2021-07-09 17:48:36,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:36,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141867178] [2021-07-09 17:48:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:36,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141867178] [2021-07-09 17:48:36,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141867178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626284117] [2021-07-09 17:48:36,762 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 [2021-07-09 17:48:36,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:36,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:37,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626284117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:37,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:37,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:37,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635140857] [2021-07-09 17:48:37,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:37,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:37,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:37,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:37,108 INFO L87 Difference]: Start difference. First operand 824 states and 2033 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:37,522 INFO L93 Difference]: Finished difference Result 974 states and 2388 transitions. [2021-07-09 17:48:37,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:48:37,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:37,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:37,523 INFO L225 Difference]: With dead ends: 974 [2021-07-09 17:48:37,523 INFO L226 Difference]: Without dead ends: 944 [2021-07-09 17:48:37,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 643.3ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:48:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-07-09 17:48:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 840. [2021-07-09 17:48:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.470798569725864) internal successors, (2073), 839 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2073 transitions. [2021-07-09 17:48:37,535 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2073 transitions. Word has length 30 [2021-07-09 17:48:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:37,536 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2073 transitions. [2021-07-09 17:48:37,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2073 transitions. [2021-07-09 17:48:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:37,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:37,537 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:37,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:37,760 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1203309184, now seen corresponding path program 75 times [2021-07-09 17:48:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:37,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088785313] [2021-07-09 17:48:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:37,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:37,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088785313] [2021-07-09 17:48:37,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088785313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:37,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058029900] [2021-07-09 17:48:37,864 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 [2021-07-09 17:48:37,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:48:37,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:37,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:38,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058029900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:38,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:38,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:38,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681511012] [2021-07-09 17:48:38,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:38,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:38,247 INFO L87 Difference]: Start difference. First operand 840 states and 2073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:38,847 INFO L93 Difference]: Finished difference Result 1054 states and 2584 transitions. [2021-07-09 17:48:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:48:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:38,848 INFO L225 Difference]: With dead ends: 1054 [2021-07-09 17:48:38,848 INFO L226 Difference]: Without dead ends: 1016 [2021-07-09 17:48:38,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 800.6ms TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:48:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-07-09 17:48:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 856. [2021-07-09 17:48:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:38,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-07-09 17:48:38,858 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-07-09 17:48:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:38,858 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-07-09 17:48:38,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-07-09 17:48:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:38,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:38,859 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:39,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:39,060 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:39,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1390999484, now seen corresponding path program 76 times [2021-07-09 17:48:39,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:39,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750581758] [2021-07-09 17:48:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:39,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:39,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750581758] [2021-07-09 17:48:39,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750581758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:39,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373472751] [2021-07-09 17:48:39,241 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 [2021-07-09 17:48:39,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:39,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:39,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:39,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:39,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373472751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:39,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:39,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:39,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123245340] [2021-07-09 17:48:39,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:39,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:39,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:39,574 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:40,028 INFO L93 Difference]: Finished difference Result 990 states and 2432 transitions. [2021-07-09 17:48:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:40,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:40,029 INFO L225 Difference]: With dead ends: 990 [2021-07-09 17:48:40,029 INFO L226 Difference]: Without dead ends: 968 [2021-07-09 17:48:40,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:48:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-07-09 17:48:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 856. [2021-07-09 17:48:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-07-09 17:48:40,040 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-07-09 17:48:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:40,040 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-07-09 17:48:40,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-07-09 17:48:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:40,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:40,041 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:40,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-07-09 17:48:40,242 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:40,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1816515712, now seen corresponding path program 77 times [2021-07-09 17:48:40,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:40,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930791337] [2021-07-09 17:48:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:40,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930791337] [2021-07-09 17:48:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930791337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:40,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821281196] [2021-07-09 17:48:40,363 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 [2021-07-09 17:48:40,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:48:40,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:40,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821281196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:40,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:40,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:40,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169483698] [2021-07-09 17:48:40,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:40,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:40,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:40,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:40,696 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:41,178 INFO L93 Difference]: Finished difference Result 1110 states and 2724 transitions. [2021-07-09 17:48:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:48:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:41,180 INFO L225 Difference]: With dead ends: 1110 [2021-07-09 17:48:41,180 INFO L226 Difference]: Without dead ends: 1072 [2021-07-09 17:48:41,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:48:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-07-09 17:48:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 888. [2021-07-09 17:48:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.4723788049605413) internal successors, (2193), 887 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2193 transitions. [2021-07-09 17:48:41,189 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2193 transitions. Word has length 30 [2021-07-09 17:48:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:41,189 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2193 transitions. [2021-07-09 17:48:41,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:41,189 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2193 transitions. [2021-07-09 17:48:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:41,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:41,191 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:41,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-07-09 17:48:41,391 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1628825412, now seen corresponding path program 78 times [2021-07-09 17:48:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:41,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907573820] [2021-07-09 17:48:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:41,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907573820] [2021-07-09 17:48:41,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907573820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740157449] [2021-07-09 17:48:41,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:48:41,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:48:41,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:41,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:41,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740157449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:41,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:41,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:41,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269580231] [2021-07-09 17:48:41,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:41,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:41,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:41,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:41,947 INFO L87 Difference]: Start difference. First operand 888 states and 2193 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:42,436 INFO L93 Difference]: Finished difference Result 1158 states and 2848 transitions. [2021-07-09 17:48:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:42,438 INFO L225 Difference]: With dead ends: 1158 [2021-07-09 17:48:42,438 INFO L226 Difference]: Without dead ends: 1128 [2021-07-09 17:48:42,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 741.9ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:48:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-07-09 17:48:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 896. [2021-07-09 17:48:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.4726256983240225) internal successors, (2213), 895 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2213 transitions. [2021-07-09 17:48:42,454 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2213 transitions. Word has length 30 [2021-07-09 17:48:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:42,455 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2213 transitions. [2021-07-09 17:48:42,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2213 transitions. [2021-07-09 17:48:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:42,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:42,456 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:42,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-07-09 17:48:42,679 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:42,679 INFO L82 PathProgramCache]: Analyzing trace with hash -236393216, now seen corresponding path program 79 times [2021-07-09 17:48:42,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:42,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890483153] [2021-07-09 17:48:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:42,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890483153] [2021-07-09 17:48:42,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890483153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370291527] [2021-07-09 17:48:42,951 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 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 [2021-07-09 17:48:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:42,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:43,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370291527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:43,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:43,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:43,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313760788] [2021-07-09 17:48:43,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:43,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:43,305 INFO L87 Difference]: Start difference. First operand 896 states and 2213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:43,834 INFO L93 Difference]: Finished difference Result 1102 states and 2708 transitions. [2021-07-09 17:48:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:43,836 INFO L225 Difference]: With dead ends: 1102 [2021-07-09 17:48:43,836 INFO L226 Difference]: Without dead ends: 1072 [2021-07-09 17:48:43,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-07-09 17:48:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 928. [2021-07-09 17:48:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.4735706580366776) internal successors, (2293), 927 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2293 transitions. [2021-07-09 17:48:43,845 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2293 transitions. Word has length 30 [2021-07-09 17:48:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:43,845 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 2293 transitions. [2021-07-09 17:48:43,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2293 transitions. [2021-07-09 17:48:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:43,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:43,847 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:44,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-07-09 17:48:44,050 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1967162948, now seen corresponding path program 80 times [2021-07-09 17:48:44,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:44,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154022356] [2021-07-09 17:48:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:44,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:44,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154022356] [2021-07-09 17:48:44,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154022356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:44,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840977428] [2021-07-09 17:48:44,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:48:44,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:44,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:44,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:44,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:44,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840977428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:44,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:44,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:44,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988758311] [2021-07-09 17:48:44,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:44,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:44,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:44,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:44,581 INFO L87 Difference]: Start difference. First operand 928 states and 2293 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:45,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:45,240 INFO L93 Difference]: Finished difference Result 1174 states and 2888 transitions. [2021-07-09 17:48:45,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:48:45,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:45,241 INFO L225 Difference]: With dead ends: 1174 [2021-07-09 17:48:45,241 INFO L226 Difference]: Without dead ends: 1144 [2021-07-09 17:48:45,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 920.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:48:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-07-09 17:48:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 944. [2021-07-09 17:48:45,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 2.4740190880169672) internal successors, (2333), 943 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2333 transitions. [2021-07-09 17:48:45,251 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2333 transitions. Word has length 30 [2021-07-09 17:48:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:45,251 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 2333 transitions. [2021-07-09 17:48:45,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2333 transitions. [2021-07-09 17:48:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:45,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:45,252 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:45,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:45,453 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:45,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1448111360, now seen corresponding path program 81 times [2021-07-09 17:48:45,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:45,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519092817] [2021-07-09 17:48:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:45,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519092817] [2021-07-09 17:48:45,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519092817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:45,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908081295] [2021-07-09 17:48:45,632 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 [2021-07-09 17:48:45,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:48:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:45,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:45,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:46,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908081295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:46,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:46,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:46,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403170306] [2021-07-09 17:48:46,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:46,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:46,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:46,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:46,018 INFO L87 Difference]: Start difference. First operand 944 states and 2333 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:46,571 INFO L93 Difference]: Finished difference Result 1284 states and 3123 transitions. [2021-07-09 17:48:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:48:46,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:46,572 INFO L225 Difference]: With dead ends: 1284 [2021-07-09 17:48:46,573 INFO L226 Difference]: Without dead ends: 1254 [2021-07-09 17:48:46,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:48:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-07-09 17:48:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 992. [2021-07-09 17:48:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 2.4752774974772955) internal successors, (2453), 991 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) [2021-07-09 17:48:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2453 transitions. [2021-07-09 17:48:46,583 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2453 transitions. Word has length 30 [2021-07-09 17:48:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:46,583 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 2453 transitions. [2021-07-09 17:48:46,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2453 transitions. [2021-07-09 17:48:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:46,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:46,584 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:46,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:46,785 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1109773824, now seen corresponding path program 82 times [2021-07-09 17:48:46,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:46,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234358584] [2021-07-09 17:48:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:46,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:46,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234358584] [2021-07-09 17:48:46,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234358584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:46,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800492000] [2021-07-09 17:48:46,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:48:46,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:47,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800492000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:47,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:47,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:47,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301573007] [2021-07-09 17:48:47,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:47,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:47,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:47,332 INFO L87 Difference]: Start difference. First operand 992 states and 2453 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:47,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:47,957 INFO L93 Difference]: Finished difference Result 1222 states and 3008 transitions. [2021-07-09 17:48:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:48:47,957 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:47,958 INFO L225 Difference]: With dead ends: 1222 [2021-07-09 17:48:47,958 INFO L226 Difference]: Without dead ends: 1192 [2021-07-09 17:48:47,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 891.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:48:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-07-09 17:48:47,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1016. [2021-07-09 17:48:47,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.475862068965517) internal successors, (2513), 1015 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:47,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2513 transitions. [2021-07-09 17:48:47,968 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2513 transitions. Word has length 30 [2021-07-09 17:48:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:47,969 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2513 transitions. [2021-07-09 17:48:47,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:47,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2513 transitions. [2021-07-09 17:48:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:47,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:47,970 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:48,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable982,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:48,170 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:48,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:48,171 INFO L82 PathProgramCache]: Analyzing trace with hash -620995908, now seen corresponding path program 83 times [2021-07-09 17:48:48,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:48,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071553008] [2021-07-09 17:48:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:48,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:48,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071553008] [2021-07-09 17:48:48,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071553008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:48,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832006820] [2021-07-09 17:48:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:48:48,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:48:48,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:48,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:48,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832006820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:48,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:48,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:48,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016575761] [2021-07-09 17:48:48,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:48,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:48,758 INFO L87 Difference]: Start difference. First operand 1016 states and 2513 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:49,302 INFO L93 Difference]: Finished difference Result 1302 states and 3208 transitions. [2021-07-09 17:48:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:49,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:49,304 INFO L225 Difference]: With dead ends: 1302 [2021-07-09 17:48:49,304 INFO L226 Difference]: Without dead ends: 1272 [2021-07-09 17:48:49,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 857.6ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-07-09 17:48:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1040. [2021-07-09 17:48:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.4764196342637153) internal successors, (2573), 1039 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2573 transitions. [2021-07-09 17:48:49,314 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2573 transitions. Word has length 30 [2021-07-09 17:48:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:49,314 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2573 transitions. [2021-07-09 17:48:49,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:49,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2573 transitions. [2021-07-09 17:48:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:49,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:49,316 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:49,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:49,516 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash -810930304, now seen corresponding path program 84 times [2021-07-09 17:48:49,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:49,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558672461] [2021-07-09 17:48:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:49,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:49,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558672461] [2021-07-09 17:48:49,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558672461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:49,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041902301] [2021-07-09 17:48:49,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:48:49,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:48:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:49,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:49,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:50,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041902301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:50,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:50,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:50,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783116768] [2021-07-09 17:48:50,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:50,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:50,088 INFO L87 Difference]: Start difference. First operand 1040 states and 2573 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:50,720 INFO L93 Difference]: Finished difference Result 1318 states and 3248 transitions. [2021-07-09 17:48:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:48:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:50,721 INFO L225 Difference]: With dead ends: 1318 [2021-07-09 17:48:50,721 INFO L226 Difference]: Without dead ends: 1288 [2021-07-09 17:48:50,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 891.5ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:48:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-09 17:48:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1048. [2021-07-09 17:48:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.4765998089780323) internal successors, (2593), 1047 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2593 transitions. [2021-07-09 17:48:50,732 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2593 transitions. Word has length 30 [2021-07-09 17:48:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:50,732 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2593 transitions. [2021-07-09 17:48:50,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2593 transitions. [2021-07-09 17:48:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:50,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:50,733 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:50,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-07-09 17:48:50,934 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:50,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2010082424, now seen corresponding path program 85 times [2021-07-09 17:48:50,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:50,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114659183] [2021-07-09 17:48:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:51,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:51,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114659183] [2021-07-09 17:48:51,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114659183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:51,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848976517] [2021-07-09 17:48:51,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:48:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:51,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:51,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848976517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:51,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:51,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:51,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401994474] [2021-07-09 17:48:51,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:51,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:51,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:51,512 INFO L87 Difference]: Start difference. First operand 1048 states and 2593 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:52,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:52,464 INFO L93 Difference]: Finished difference Result 1492 states and 3643 transitions. [2021-07-09 17:48:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:48:52,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:52,467 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 17:48:52,467 INFO L226 Difference]: Without dead ends: 1462 [2021-07-09 17:48:52,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1193.1ms TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:48:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-07-09 17:48:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1152. [2021-07-09 17:48:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.4787141615986097) internal successors, (2853), 1151 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2853 transitions. [2021-07-09 17:48:52,478 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2853 transitions. Word has length 30 [2021-07-09 17:48:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:52,478 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2853 transitions. [2021-07-09 17:48:52,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2853 transitions. [2021-07-09 17:48:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:52,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:52,480 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:52,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1030,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:52,680 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1947238460, now seen corresponding path program 86 times [2021-07-09 17:48:52,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:52,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964533288] [2021-07-09 17:48:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:52,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:52,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964533288] [2021-07-09 17:48:52,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964533288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:52,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067907785] [2021-07-09 17:48:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:48:52,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:48:52,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:53,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067907785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:53,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:53,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:53,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398220828] [2021-07-09 17:48:53,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:53,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:53,057 INFO L87 Difference]: Start difference. First operand 1152 states and 2853 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:53,521 INFO L93 Difference]: Finished difference Result 1286 states and 3168 transitions. [2021-07-09 17:48:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:48:53,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:53,522 INFO L225 Difference]: With dead ends: 1286 [2021-07-09 17:48:53,523 INFO L226 Difference]: Without dead ends: 1256 [2021-07-09 17:48:53,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:48:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-07-09 17:48:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1168. [2021-07-09 17:48:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.479005998286204) internal successors, (2893), 1167 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2893 transitions. [2021-07-09 17:48:53,534 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2893 transitions. Word has length 30 [2021-07-09 17:48:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:53,534 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2893 transitions. [2021-07-09 17:48:53,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2893 transitions. [2021-07-09 17:48:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:53,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:53,536 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:53,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-07-09 17:48:53,736 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:53,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1965486592, now seen corresponding path program 87 times [2021-07-09 17:48:53,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:53,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961750754] [2021-07-09 17:48:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:53,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:53,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961750754] [2021-07-09 17:48:53,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961750754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:53,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843508816] [2021-07-09 17:48:53,904 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 [2021-07-09 17:48:53,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:48:53,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:53,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:48:53,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:54,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843508816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:54,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:54,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:54,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847180993] [2021-07-09 17:48:54,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:54,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:54,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:54,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:54,212 INFO L87 Difference]: Start difference. First operand 1168 states and 2893 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:54,684 INFO L93 Difference]: Finished difference Result 1468 states and 3583 transitions. [2021-07-09 17:48:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:48:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:54,686 INFO L225 Difference]: With dead ends: 1468 [2021-07-09 17:48:54,686 INFO L226 Difference]: Without dead ends: 1438 [2021-07-09 17:48:54,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 642.8ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:48:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-07-09 17:48:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1192. [2021-07-09 17:48:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.479429051217464) internal successors, (2953), 1191 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2953 transitions. [2021-07-09 17:48:54,705 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2953 transitions. Word has length 30 [2021-07-09 17:48:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:54,705 INFO L482 AbstractCegarLoop]: Abstraction has 1192 states and 2953 transitions. [2021-07-09 17:48:54,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:54,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2953 transitions. [2021-07-09 17:48:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:54,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:54,706 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:54,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:54,907 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1991143168, now seen corresponding path program 88 times [2021-07-09 17:48:54,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:54,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098116338] [2021-07-09 17:48:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:55,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:55,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098116338] [2021-07-09 17:48:55,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098116338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:55,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260517915] [2021-07-09 17:48:55,084 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 [2021-07-09 17:48:55,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:48:55,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:55,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:55,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260517915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:55,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:55,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:55,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151996187] [2021-07-09 17:48:55,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:55,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:55,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:55,448 INFO L87 Difference]: Start difference. First operand 1192 states and 2953 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:55,961 INFO L93 Difference]: Finished difference Result 1350 states and 3332 transitions. [2021-07-09 17:48:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:55,963 INFO L225 Difference]: With dead ends: 1350 [2021-07-09 17:48:55,963 INFO L226 Difference]: Without dead ends: 1328 [2021-07-09 17:48:55,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-07-09 17:48:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1208. [2021-07-09 17:48:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-07-09 17:48:55,975 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-07-09 17:48:55,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:55,976 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-07-09 17:48:55,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:55,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-07-09 17:48:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:55,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:55,977 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:56,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-07-09 17:48:56,178 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:56,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash 260373436, now seen corresponding path program 89 times [2021-07-09 17:48:56,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:56,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103631033] [2021-07-09 17:48:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:56,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103631033] [2021-07-09 17:48:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103631033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:56,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209904708] [2021-07-09 17:48:56,299 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 [2021-07-09 17:48:56,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:48:56,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:56,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:56,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:56,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209904708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:56,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:56,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:56,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605105265] [2021-07-09 17:48:56,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:56,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:56,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:56,701 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:57,160 INFO L93 Difference]: Finished difference Result 1342 states and 3312 transitions. [2021-07-09 17:48:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:48:57,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:57,163 INFO L225 Difference]: With dead ends: 1342 [2021-07-09 17:48:57,163 INFO L226 Difference]: Without dead ends: 1320 [2021-07-09 17:48:57,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:48:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-07-09 17:48:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1200. [2021-07-09 17:48:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.479566305254379) internal successors, (2973), 1199 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2973 transitions. [2021-07-09 17:48:57,176 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2973 transitions. Word has length 30 [2021-07-09 17:48:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:57,176 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2973 transitions. [2021-07-09 17:48:57,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2973 transitions. [2021-07-09 17:48:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:57,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:57,178 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:57,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-07-09 17:48:57,380 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1204703360, now seen corresponding path program 90 times [2021-07-09 17:48:57,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:57,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967693823] [2021-07-09 17:48:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:57,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967693823] [2021-07-09 17:48:57,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967693823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958241890] [2021-07-09 17:48:57,506 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 [2021-07-09 17:48:57,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:48:57,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:48:57,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:57,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958241890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:57,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:57,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:57,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045699809] [2021-07-09 17:48:57,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:57,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:57,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:57,848 INFO L87 Difference]: Start difference. First operand 1200 states and 2973 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:58,487 INFO L93 Difference]: Finished difference Result 1398 states and 3448 transitions. [2021-07-09 17:48:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:48:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:58,489 INFO L225 Difference]: With dead ends: 1398 [2021-07-09 17:48:58,489 INFO L226 Difference]: Without dead ends: 1368 [2021-07-09 17:48:58,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:48:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-07-09 17:48:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1208. [2021-07-09 17:48:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-07-09 17:48:58,503 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-07-09 17:48:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:58,504 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-07-09 17:48:58,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-07-09 17:48:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:58,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:58,505 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:48:58,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1108,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:48:58,706 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:48:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:48:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash 70439040, now seen corresponding path program 91 times [2021-07-09 17:48:58,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:48:58,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548033039] [2021-07-09 17:48:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:48:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:58,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:48:58,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548033039] [2021-07-09 17:48:58,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548033039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:58,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899936380] [2021-07-09 17:48:58,874 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 [2021-07-09 17:48:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:48:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:48:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:48:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:48:59,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899936380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:48:59,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:48:59,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:48:59,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322738506] [2021-07-09 17:48:59,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:48:59,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:48:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:48:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:48:59,221 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:48:59,901 INFO L93 Difference]: Finished difference Result 1462 states and 3608 transitions. [2021-07-09 17:48:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:48:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:48:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:48:59,903 INFO L225 Difference]: With dead ends: 1462 [2021-07-09 17:48:59,903 INFO L226 Difference]: Without dead ends: 1432 [2021-07-09 17:48:59,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 870.2ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:48:59,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-07-09 17:48:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1240. [2021-07-09 17:48:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.480225988700565) internal successors, (3073), 1239 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3073 transitions. [2021-07-09 17:48:59,915 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3073 transitions. Word has length 30 [2021-07-09 17:48:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:48:59,915 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 3073 transitions. [2021-07-09 17:48:59,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:48:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3073 transitions. [2021-07-09 17:48:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:48:59,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:48:59,916 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:00,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:00,117 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1329577404, now seen corresponding path program 92 times [2021-07-09 17:49:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:00,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583624553] [2021-07-09 17:49:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:00,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583624553] [2021-07-09 17:49:00,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583624553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:00,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695875135] [2021-07-09 17:49:00,252 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 [2021-07-09 17:49:00,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:00,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695875135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820394833] [2021-07-09 17:49:00,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:00,667 INFO L87 Difference]: Start difference. First operand 1240 states and 3073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:01,204 INFO L93 Difference]: Finished difference Result 1834 states and 4484 transitions. [2021-07-09 17:49:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:01,206 INFO L225 Difference]: With dead ends: 1834 [2021-07-09 17:49:01,206 INFO L226 Difference]: Without dead ends: 1776 [2021-07-09 17:49:01,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 781.2ms TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:49:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-07-09 17:49:01,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1360. [2021-07-09 17:49:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.487858719646799) internal successors, (3381), 1359 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3381 transitions. [2021-07-09 17:49:01,226 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3381 transitions. Word has length 30 [2021-07-09 17:49:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:01,226 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3381 transitions. [2021-07-09 17:49:01,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3381 transitions. [2021-07-09 17:49:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:01,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:01,227 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:01,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-07-09 17:49:01,428 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:01,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1619222852, now seen corresponding path program 93 times [2021-07-09 17:49:01,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:01,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718711907] [2021-07-09 17:49:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:01,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:01,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718711907] [2021-07-09 17:49:01,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718711907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:01,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841393009] [2021-07-09 17:49:01,576 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 [2021-07-09 17:49:01,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:49:01,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:01,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:01,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:01,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841393009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:01,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:01,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:01,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036516035] [2021-07-09 17:49:01,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:01,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:01,953 INFO L87 Difference]: Start difference. First operand 1360 states and 3381 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:02,397 INFO L93 Difference]: Finished difference Result 1574 states and 3896 transitions. [2021-07-09 17:49:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:02,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:02,399 INFO L225 Difference]: With dead ends: 1574 [2021-07-09 17:49:02,399 INFO L226 Difference]: Without dead ends: 1544 [2021-07-09 17:49:02,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 692.1ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:49:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-09 17:49:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1376. [2021-07-09 17:49:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.488) internal successors, (3421), 1375 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 3421 transitions. [2021-07-09 17:49:02,412 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 3421 transitions. Word has length 30 [2021-07-09 17:49:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:02,412 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 3421 transitions. [2021-07-09 17:49:02,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 3421 transitions. [2021-07-09 17:49:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:02,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:02,413 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:02,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1156 [2021-07-09 17:49:02,614 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:02,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:02,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1975808520, now seen corresponding path program 94 times [2021-07-09 17:49:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:02,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031667834] [2021-07-09 17:49:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:02,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:02,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031667834] [2021-07-09 17:49:02,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031667834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:02,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177995815] [2021-07-09 17:49:02,710 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 [2021-07-09 17:49:02,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:02,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:02,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:03,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177995815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:03,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:03,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:03,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685781484] [2021-07-09 17:49:03,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:03,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:03,087 INFO L87 Difference]: Start difference. First operand 1376 states and 3421 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:03,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:03,699 INFO L93 Difference]: Finished difference Result 1646 states and 4072 transitions. [2021-07-09 17:49:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:03,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:03,702 INFO L225 Difference]: With dead ends: 1646 [2021-07-09 17:49:03,702 INFO L226 Difference]: Without dead ends: 1608 [2021-07-09 17:49:03,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 766.3ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-07-09 17:49:03,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1384. [2021-07-09 17:49:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.488069414316703) internal successors, (3441), 1383 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:03,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3441 transitions. [2021-07-09 17:49:03,715 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3441 transitions. Word has length 30 [2021-07-09 17:49:03,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:03,715 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 3441 transitions. [2021-07-09 17:49:03,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:03,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3441 transitions. [2021-07-09 17:49:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:03,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:03,716 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:03,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-07-09 17:49:03,918 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1217793912, now seen corresponding path program 95 times [2021-07-09 17:49:03,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:03,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839835686] [2021-07-09 17:49:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:04,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:04,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839835686] [2021-07-09 17:49:04,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839835686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:04,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261707422] [2021-07-09 17:49:04,021 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 [2021-07-09 17:49:04,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:49:04,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:04,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:04,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261707422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:04,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:04,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:04,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711959483] [2021-07-09 17:49:04,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:04,389 INFO L87 Difference]: Start difference. First operand 1384 states and 3441 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:04,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:04,853 INFO L93 Difference]: Finished difference Result 1630 states and 4032 transitions. [2021-07-09 17:49:04,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:49:04,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:04,855 INFO L225 Difference]: With dead ends: 1630 [2021-07-09 17:49:04,855 INFO L226 Difference]: Without dead ends: 1592 [2021-07-09 17:49:04,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:49:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-07-09 17:49:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1392. [2021-07-09 17:49:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.488138030194105) internal successors, (3461), 1391 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 3461 transitions. [2021-07-09 17:49:04,868 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 3461 transitions. Word has length 30 [2021-07-09 17:49:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:04,868 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 3461 transitions. [2021-07-09 17:49:04,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 3461 transitions. [2021-07-09 17:49:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:04,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:04,870 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:05,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:05,070 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash 879456376, now seen corresponding path program 96 times [2021-07-09 17:49:05,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:05,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445616113] [2021-07-09 17:49:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:05,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:05,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445616113] [2021-07-09 17:49:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445616113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:05,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776486421] [2021-07-09 17:49:05,267 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 [2021-07-09 17:49:05,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:49:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:05,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776486421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:05,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:05,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:05,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529538194] [2021-07-09 17:49:05,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:05,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:05,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:05,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:05,615 INFO L87 Difference]: Start difference. First operand 1392 states and 3461 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:06,046 INFO L93 Difference]: Finished difference Result 1664 states and 4071 transitions. [2021-07-09 17:49:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:49:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:06,048 INFO L225 Difference]: With dead ends: 1664 [2021-07-09 17:49:06,048 INFO L226 Difference]: Without dead ends: 1622 [2021-07-09 17:49:06,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 687.0ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:49:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-07-09 17:49:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1424. [2021-07-09 17:49:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.488404778636683) internal successors, (3541), 1423 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3541 transitions. [2021-07-09 17:49:06,063 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3541 transitions. Word has length 30 [2021-07-09 17:49:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:06,063 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3541 transitions. [2021-07-09 17:49:06,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3541 transitions. [2021-07-09 17:49:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:06,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:06,064 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:06,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1206 [2021-07-09 17:49:06,265 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash -851313356, now seen corresponding path program 97 times [2021-07-09 17:49:06,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:06,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671455577] [2021-07-09 17:49:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:06,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:06,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671455577] [2021-07-09 17:49:06,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671455577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:06,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382158862] [2021-07-09 17:49:06,418 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 [2021-07-09 17:49:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:06,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:06,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382158862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:06,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:06,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:06,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289709562] [2021-07-09 17:49:06,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:06,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:06,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:06,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:06,769 INFO L87 Difference]: Start difference. First operand 1424 states and 3541 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:07,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:07,366 INFO L93 Difference]: Finished difference Result 1774 states and 4360 transitions. [2021-07-09 17:49:07,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:07,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:07,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:07,368 INFO L225 Difference]: With dead ends: 1774 [2021-07-09 17:49:07,368 INFO L226 Difference]: Without dead ends: 1744 [2021-07-09 17:49:07,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 774.5ms TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:49:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-07-09 17:49:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1432. [2021-07-09 17:49:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.488469601677149) internal successors, (3561), 1431 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 3561 transitions. [2021-07-09 17:49:07,382 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 3561 transitions. Word has length 30 [2021-07-09 17:49:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:07,382 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 3561 transitions. [2021-07-09 17:49:07,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 3561 transitions. [2021-07-09 17:49:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:07,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:07,384 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:07,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1218 [2021-07-09 17:49:07,584 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:07,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1486093244, now seen corresponding path program 98 times [2021-07-09 17:49:07,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:07,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880162911] [2021-07-09 17:49:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:07,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880162911] [2021-07-09 17:49:07,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880162911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035628874] [2021-07-09 17:49:07,734 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 [2021-07-09 17:49:07,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:07,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:07,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:08,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035628874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:08,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:08,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:08,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401188546] [2021-07-09 17:49:08,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:08,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:08,056 INFO L87 Difference]: Start difference. First operand 1432 states and 3561 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:08,582 INFO L93 Difference]: Finished difference Result 1646 states and 4076 transitions. [2021-07-09 17:49:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:49:08,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:08,584 INFO L225 Difference]: With dead ends: 1646 [2021-07-09 17:49:08,584 INFO L226 Difference]: Without dead ends: 1616 [2021-07-09 17:49:08,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 713.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:49:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-07-09 17:49:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1464. [2021-07-09 17:49:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-07-09 17:49:08,597 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-07-09 17:49:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:08,597 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-07-09 17:49:08,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-07-09 17:49:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:08,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:08,598 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:08,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-07-09 17:49:08,799 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1416441856, now seen corresponding path program 99 times [2021-07-09 17:49:08,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:08,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514153723] [2021-07-09 17:49:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:08,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:08,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514153723] [2021-07-09 17:49:08,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514153723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:08,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457213253] [2021-07-09 17:49:08,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:49:08,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:49:08,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:09,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457213253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:09,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:09,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:09,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192330461] [2021-07-09 17:49:09,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:09,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:09,285 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:09,689 INFO L93 Difference]: Finished difference Result 1686 states and 4176 transitions. [2021-07-09 17:49:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:49:09,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:09,691 INFO L225 Difference]: With dead ends: 1686 [2021-07-09 17:49:09,691 INFO L226 Difference]: Without dead ends: 1656 [2021-07-09 17:49:09,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:49:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-07-09 17:49:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1464. [2021-07-09 17:49:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-07-09 17:49:09,704 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-07-09 17:49:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:09,704 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-07-09 17:49:09,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-07-09 17:49:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:09,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:09,706 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:09,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:09,906 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1872069188, now seen corresponding path program 100 times [2021-07-09 17:49:09,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:09,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069743567] [2021-07-09 17:49:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:10,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:10,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069743567] [2021-07-09 17:49:10,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069743567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:10,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784537473] [2021-07-09 17:49:10,088 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 [2021-07-09 17:49:10,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:10,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:10,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784537473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:10,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:10,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:10,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682872635] [2021-07-09 17:49:10,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:10,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:10,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:10,504 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:11,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:11,050 INFO L93 Difference]: Finished difference Result 1678 states and 4156 transitions. [2021-07-09 17:49:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:49:11,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:11,052 INFO L225 Difference]: With dead ends: 1678 [2021-07-09 17:49:11,052 INFO L226 Difference]: Without dead ends: 1648 [2021-07-09 17:49:11,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 867.9ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:49:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-07-09 17:49:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1472. [2021-07-09 17:49:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.488783140720598) internal successors, (3661), 1471 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 3661 transitions. [2021-07-09 17:49:11,067 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 3661 transitions. Word has length 30 [2021-07-09 17:49:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:11,067 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 3661 transitions. [2021-07-09 17:49:11,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 3661 transitions. [2021-07-09 17:49:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:11,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:11,068 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:11,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1277 [2021-07-09 17:49:11,269 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 848281916, now seen corresponding path program 101 times [2021-07-09 17:49:11,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:11,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619195181] [2021-07-09 17:49:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:11,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:11,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619195181] [2021-07-09 17:49:11,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619195181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122435426] [2021-07-09 17:49:11,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:49:11,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:49:11,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:11,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:11,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122435426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:11,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:11,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:11,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795350702] [2021-07-09 17:49:11,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:11,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:11,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:11,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:11,793 INFO L87 Difference]: Start difference. First operand 1472 states and 3661 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:12,412 INFO L93 Difference]: Finished difference Result 1844 states and 4531 transitions. [2021-07-09 17:49:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:12,416 INFO L225 Difference]: With dead ends: 1844 [2021-07-09 17:49:12,416 INFO L226 Difference]: Without dead ends: 1814 [2021-07-09 17:49:12,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:49:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-07-09 17:49:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1496. [2021-07-09 17:49:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.488963210702341) internal successors, (3721), 1495 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3721 transitions. [2021-07-09 17:49:12,431 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3721 transitions. Word has length 30 [2021-07-09 17:49:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:12,431 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3721 transitions. [2021-07-09 17:49:12,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:12,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3721 transitions. [2021-07-09 17:49:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:12,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:12,433 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:12,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:12,633 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:12,634 INFO L82 PathProgramCache]: Analyzing trace with hash 204964284, now seen corresponding path program 102 times [2021-07-09 17:49:12,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:12,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663272667] [2021-07-09 17:49:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:12,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663272667] [2021-07-09 17:49:12,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663272667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:12,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387261871] [2021-07-09 17:49:12,744 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 [2021-07-09 17:49:12,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:49:12,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:12,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:13,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387261871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:13,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:13,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:13,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956828008] [2021-07-09 17:49:13,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:13,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:13,017 INFO L87 Difference]: Start difference. First operand 1496 states and 3721 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:13,466 INFO L93 Difference]: Finished difference Result 1782 states and 4372 transitions. [2021-07-09 17:49:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:49:13,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:13,469 INFO L225 Difference]: With dead ends: 1782 [2021-07-09 17:49:13,469 INFO L226 Difference]: Without dead ends: 1744 [2021-07-09 17:49:13,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:49:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-07-09 17:49:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1536. [2021-07-09 17:49:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-07-09 17:49:13,485 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-07-09 17:49:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:13,485 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-07-09 17:49:13,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-07-09 17:49:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:13,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:13,487 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:13,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-07-09 17:49:13,687 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1072422212, now seen corresponding path program 103 times [2021-07-09 17:49:13,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:13,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739363800] [2021-07-09 17:49:13,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:13,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:13,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739363800] [2021-07-09 17:49:13,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739363800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:13,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772323957] [2021-07-09 17:49:13,812 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 [2021-07-09 17:49:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:13,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772323957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:14,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:14,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078195849] [2021-07-09 17:49:14,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:14,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:14,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:14,111 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:14,656 INFO L93 Difference]: Finished difference Result 1670 states and 4136 transitions. [2021-07-09 17:49:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:14,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:14,670 INFO L225 Difference]: With dead ends: 1670 [2021-07-09 17:49:14,671 INFO L226 Difference]: Without dead ends: 1640 [2021-07-09 17:49:14,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-07-09 17:49:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1536. [2021-07-09 17:49:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-07-09 17:49:14,685 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-07-09 17:49:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:14,685 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-07-09 17:49:14,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-07-09 17:49:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:14,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:14,686 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:14,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-07-09 17:49:14,887 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176184, now seen corresponding path program 104 times [2021-07-09 17:49:14,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:14,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459981444] [2021-07-09 17:49:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:14,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:14,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459981444] [2021-07-09 17:49:14,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459981444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:14,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518107753] [2021-07-09 17:49:14,995 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 [2021-07-09 17:49:15,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:15,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:15,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:15,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:15,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518107753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:15,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:15,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:15,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509499836] [2021-07-09 17:49:15,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:15,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:15,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:15,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:15,354 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:15,932 INFO L93 Difference]: Finished difference Result 1862 states and 4616 transitions. [2021-07-09 17:49:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:49:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:15,935 INFO L225 Difference]: With dead ends: 1862 [2021-07-09 17:49:15,935 INFO L226 Difference]: Without dead ends: 1824 [2021-07-09 17:49:15,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:49:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-07-09 17:49:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1528. [2021-07-09 17:49:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.4891944990176817) internal successors, (3801), 1527 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3801 transitions. [2021-07-09 17:49:15,950 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3801 transitions. Word has length 30 [2021-07-09 17:49:15,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:15,950 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 3801 transitions. [2021-07-09 17:49:15,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:15,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3801 transitions. [2021-07-09 17:49:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:15,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:15,951 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:16,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1339 [2021-07-09 17:49:16,153 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash -207056904, now seen corresponding path program 105 times [2021-07-09 17:49:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:16,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010745299] [2021-07-09 17:49:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:16,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:16,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010745299] [2021-07-09 17:49:16,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010745299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:16,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008379413] [2021-07-09 17:49:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:49:16,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:49:16,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:16,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008379413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:16,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:16,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:16,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649044785] [2021-07-09 17:49:16,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:16,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:16,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:16,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:16,639 INFO L87 Difference]: Start difference. First operand 1528 states and 3801 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:17,274 INFO L93 Difference]: Finished difference Result 1806 states and 4476 transitions. [2021-07-09 17:49:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:17,276 INFO L225 Difference]: With dead ends: 1806 [2021-07-09 17:49:17,276 INFO L226 Difference]: Without dead ends: 1776 [2021-07-09 17:49:17,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 843.8ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-07-09 17:49:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1536. [2021-07-09 17:49:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-07-09 17:49:17,291 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-07-09 17:49:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:17,291 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-07-09 17:49:17,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-07-09 17:49:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:17,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:17,293 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:17,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1364 [2021-07-09 17:49:17,493 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:17,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1255775796, now seen corresponding path program 106 times [2021-07-09 17:49:17,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:17,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461061820] [2021-07-09 17:49:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:17,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:17,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461061820] [2021-07-09 17:49:17,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461061820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:17,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051170830] [2021-07-09 17:49:17,626 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 [2021-07-09 17:49:17,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:17,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:17,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:18,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051170830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:18,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:18,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:18,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758661038] [2021-07-09 17:49:18,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:18,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:18,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:18,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:18,039 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:18,573 INFO L93 Difference]: Finished difference Result 1942 states and 4776 transitions. [2021-07-09 17:49:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:18,575 INFO L225 Difference]: With dead ends: 1942 [2021-07-09 17:49:18,575 INFO L226 Difference]: Without dead ends: 1912 [2021-07-09 17:49:18,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 712.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:49:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-07-09 17:49:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1560. [2021-07-09 17:49:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 2.4894162924951893) internal successors, (3881), 1559 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 3881 transitions. [2021-07-09 17:49:18,591 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 3881 transitions. Word has length 30 [2021-07-09 17:49:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:18,591 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 3881 transitions. [2021-07-09 17:49:18,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 3881 transitions. [2021-07-09 17:49:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:18,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:18,592 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:18,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:18,793 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:18,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1646759304, now seen corresponding path program 107 times [2021-07-09 17:49:18,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:18,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119076708] [2021-07-09 17:49:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:18,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:18,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119076708] [2021-07-09 17:49:18,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119076708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:18,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561019820] [2021-07-09 17:49:18,913 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 [2021-07-09 17:49:18,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:49:18,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:18,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:19,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561019820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:19,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:19,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:19,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055543877] [2021-07-09 17:49:19,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:19,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:19,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:19,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:19,248 INFO L87 Difference]: Start difference. First operand 1560 states and 3881 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:19,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:19,721 INFO L93 Difference]: Finished difference Result 1782 states and 4420 transitions. [2021-07-09 17:49:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:49:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:19,723 INFO L225 Difference]: With dead ends: 1782 [2021-07-09 17:49:19,723 INFO L226 Difference]: Without dead ends: 1752 [2021-07-09 17:49:19,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:49:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-07-09 17:49:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1576. [2021-07-09 17:49:19,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-07-09 17:49:19,745 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-07-09 17:49:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:19,745 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-07-09 17:49:19,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-07-09 17:49:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:19,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:19,747 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:19,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:19,970 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1862466628, now seen corresponding path program 108 times [2021-07-09 17:49:19,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:19,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272017446] [2021-07-09 17:49:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:20,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272017446] [2021-07-09 17:49:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272017446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653908649] [2021-07-09 17:49:20,068 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 [2021-07-09 17:49:20,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:49:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:20,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653908649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:20,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:20,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011203219] [2021-07-09 17:49:20,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:20,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:20,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:20,390 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:20,668 INFO L93 Difference]: Finished difference Result 1702 states and 4216 transitions. [2021-07-09 17:49:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:49:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:20,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:20,670 INFO L225 Difference]: With dead ends: 1702 [2021-07-09 17:49:20,670 INFO L226 Difference]: Without dead ends: 1672 [2021-07-09 17:49:20,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:49:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-07-09 17:49:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1576. [2021-07-09 17:49:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-07-09 17:49:20,685 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-07-09 17:49:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:20,685 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-07-09 17:49:20,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-07-09 17:49:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:20,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:20,688 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:20,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1416 [2021-07-09 17:49:20,901 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:20,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1880714760, now seen corresponding path program 109 times [2021-07-09 17:49:20,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:20,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393793669] [2021-07-09 17:49:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:21,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:21,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393793669] [2021-07-09 17:49:21,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393793669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:21,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886336423] [2021-07-09 17:49:21,014 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 [2021-07-09 17:49:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:21,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:21,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886336423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:21,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:21,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:21,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086381325] [2021-07-09 17:49:21,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:21,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:21,320 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:21,857 INFO L93 Difference]: Finished difference Result 1798 states and 4456 transitions. [2021-07-09 17:49:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:21,858 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:21,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:21,860 INFO L225 Difference]: With dead ends: 1798 [2021-07-09 17:49:21,860 INFO L226 Difference]: Without dead ends: 1768 [2021-07-09 17:49:21,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:49:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-07-09 17:49:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1584. [2021-07-09 17:49:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.4895767530006316) internal successors, (3941), 1583 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 3941 transitions. [2021-07-09 17:49:21,875 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 3941 transitions. Word has length 30 [2021-07-09 17:49:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:21,875 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 3941 transitions. [2021-07-09 17:49:21,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 3941 transitions. [2021-07-09 17:49:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:21,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:21,877 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:22,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1429,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:22,078 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024460, now seen corresponding path program 110 times [2021-07-09 17:49:22,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:22,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563824474] [2021-07-09 17:49:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:22,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563824474] [2021-07-09 17:49:22,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563824474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:22,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165192582] [2021-07-09 17:49:22,170 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 [2021-07-09 17:49:22,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:22,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165192582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:22,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906844751] [2021-07-09 17:49:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:22,569 INFO L87 Difference]: Start difference. First operand 1584 states and 3941 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:23,234 INFO L93 Difference]: Finished difference Result 1894 states and 4656 transitions. [2021-07-09 17:49:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:23,236 INFO L225 Difference]: With dead ends: 1894 [2021-07-09 17:49:23,236 INFO L226 Difference]: Without dead ends: 1864 [2021-07-09 17:49:23,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 843.4ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:49:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-07-09 17:49:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1600. [2021-07-09 17:49:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4896810506566602) internal successors, (3981), 1599 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3981 transitions. [2021-07-09 17:49:23,252 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3981 transitions. Word has length 30 [2021-07-09 17:49:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:23,252 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3981 transitions. [2021-07-09 17:49:23,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:23,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3981 transitions. [2021-07-09 17:49:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:23,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:23,254 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:23,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1442 [2021-07-09 17:49:23,454 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash -300592264, now seen corresponding path program 111 times [2021-07-09 17:49:23,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:23,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178744630] [2021-07-09 17:49:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178744630] [2021-07-09 17:49:23,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178744630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841415714] [2021-07-09 17:49:23,577 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 [2021-07-09 17:49:23,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:49:23,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:23,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:23,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:23,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841415714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:23,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:23,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:23,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537715867] [2021-07-09 17:49:23,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:23,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:23,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:23,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:23,921 INFO L87 Difference]: Start difference. First operand 1600 states and 3981 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:24,380 INFO L93 Difference]: Finished difference Result 2008 states and 4927 transitions. [2021-07-09 17:49:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:49:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:24,382 INFO L225 Difference]: With dead ends: 2008 [2021-07-09 17:49:24,382 INFO L226 Difference]: Without dead ends: 1958 [2021-07-09 17:49:24,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:49:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-07-09 17:49:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1640. [2021-07-09 17:49:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 2.48993288590604) internal successors, (4081), 1639 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 4081 transitions. [2021-07-09 17:49:24,406 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 4081 transitions. Word has length 30 [2021-07-09 17:49:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:24,406 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 4081 transitions. [2021-07-09 17:49:24,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 4081 transitions. [2021-07-09 17:49:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:24,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:24,409 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:24,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-07-09 17:49:24,626 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2031361996, now seen corresponding path program 112 times [2021-07-09 17:49:24,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:24,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120828914] [2021-07-09 17:49:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:24,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120828914] [2021-07-09 17:49:24,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120828914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271294860] [2021-07-09 17:49:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:49:24,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:24,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:25,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271294860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:25,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:25,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:25,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885641895] [2021-07-09 17:49:25,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:25,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:25,057 INFO L87 Difference]: Start difference. First operand 1640 states and 4081 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:25,578 INFO L93 Difference]: Finished difference Result 2030 states and 5000 transitions. [2021-07-09 17:49:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:49:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:25,580 INFO L225 Difference]: With dead ends: 2030 [2021-07-09 17:49:25,580 INFO L226 Difference]: Without dead ends: 2000 [2021-07-09 17:49:25,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 659.1ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:49:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-07-09 17:49:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1648. [2021-07-09 17:49:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.4899817850637525) internal successors, (4101), 1647 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4101 transitions. [2021-07-09 17:49:25,597 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4101 transitions. Word has length 30 [2021-07-09 17:49:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:25,597 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 4101 transitions. [2021-07-09 17:49:25,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4101 transitions. [2021-07-09 17:49:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:25,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:25,599 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:25,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1477 [2021-07-09 17:49:25,799 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:25,800 INFO L82 PathProgramCache]: Analyzing trace with hash -756219596, now seen corresponding path program 113 times [2021-07-09 17:49:25,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:25,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080386246] [2021-07-09 17:49:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:25,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080386246] [2021-07-09 17:49:25,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080386246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:25,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607722856] [2021-07-09 17:49:25,944 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 [2021-07-09 17:49:25,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:49:25,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:25,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:49:25,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:26,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607722856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:26,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:26,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:26,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697310973] [2021-07-09 17:49:26,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:26,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:26,289 INFO L87 Difference]: Start difference. First operand 1648 states and 4101 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:26,888 INFO L93 Difference]: Finished difference Result 2030 states and 4996 transitions. [2021-07-09 17:49:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:49:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:26,891 INFO L225 Difference]: With dead ends: 2030 [2021-07-09 17:49:26,891 INFO L226 Difference]: Without dead ends: 2000 [2021-07-09 17:49:26,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 781.2ms TimeCoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-07-09 17:49:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1672. [2021-07-09 17:49:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 2.490125673249551) internal successors, (4161), 1671 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 4161 transitions. [2021-07-09 17:49:26,907 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 4161 transitions. Word has length 30 [2021-07-09 17:49:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:26,907 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 4161 transitions. [2021-07-09 17:49:26,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 4161 transitions. [2021-07-09 17:49:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:49:26,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:26,909 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:27,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-07-09 17:49:27,110 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:27,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1490022136, now seen corresponding path program 4 times [2021-07-09 17:49:27,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:27,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728546740] [2021-07-09 17:49:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:27,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:27,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728546740] [2021-07-09 17:49:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728546740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:27,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719274679] [2021-07-09 17:49:27,513 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 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 [2021-07-09 17:49:27,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:49:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:27,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719274679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:27,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:27,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 17:49:27,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347027843] [2021-07-09 17:49:27,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:49:27,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:49:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:49:27,826 INFO L87 Difference]: Start difference. First operand 1672 states and 4161 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:28,321 INFO L93 Difference]: Finished difference Result 1774 states and 4388 transitions. [2021-07-09 17:49:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:28,321 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:49:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:28,323 INFO L225 Difference]: With dead ends: 1774 [2021-07-09 17:49:28,323 INFO L226 Difference]: Without dead ends: 1728 [2021-07-09 17:49:28,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:49:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-07-09 17:49:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1696. [2021-07-09 17:49:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.4902654867256637) internal successors, (4221), 1695 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4221 transitions. [2021-07-09 17:49:28,339 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4221 transitions. Word has length 30 [2021-07-09 17:49:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:28,339 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 4221 transitions. [2021-07-09 17:49:28,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4221 transitions. [2021-07-09 17:49:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:28,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:28,341 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:28,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-07-09 17:49:28,542 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1989405762, now seen corresponding path program 114 times [2021-07-09 17:49:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:28,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104214074] [2021-07-09 17:49:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:28,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:28,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104214074] [2021-07-09 17:49:28,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104214074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:28,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776777407] [2021-07-09 17:49:28,715 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 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 [2021-07-09 17:49:28,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:49:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:28,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:28,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:29,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776777407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:29,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:29,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550989805] [2021-07-09 17:49:29,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:29,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:29,019 INFO L87 Difference]: Start difference. First operand 1696 states and 4221 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:29,550 INFO L93 Difference]: Finished difference Result 1846 states and 4580 transitions. [2021-07-09 17:49:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:29,553 INFO L225 Difference]: With dead ends: 1846 [2021-07-09 17:49:29,553 INFO L226 Difference]: Without dead ends: 1824 [2021-07-09 17:49:29,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:49:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-07-09 17:49:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1704. [2021-07-09 17:49:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-07-09 17:49:29,569 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-07-09 17:49:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:29,569 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-07-09 17:49:29,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-07-09 17:49:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:29,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:29,571 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:29,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1528,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:29,771 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1783467330, now seen corresponding path program 115 times [2021-07-09 17:49:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:29,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474354832] [2021-07-09 17:49:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:30,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:30,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474354832] [2021-07-09 17:49:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474354832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:30,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608077393] [2021-07-09 17:49:30,016 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 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 [2021-07-09 17:49:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:30,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608077393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:30,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:30,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:30,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112542526] [2021-07-09 17:49:30,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:30,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:30,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:30,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:30,402 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:31,194 INFO L93 Difference]: Finished difference Result 1926 states and 4776 transitions. [2021-07-09 17:49:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:49:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:31,197 INFO L225 Difference]: With dead ends: 1926 [2021-07-09 17:49:31,197 INFO L226 Difference]: Without dead ends: 1896 [2021-07-09 17:49:31,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1011.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:49:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-07-09 17:49:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1704. [2021-07-09 17:49:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-07-09 17:49:31,214 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-07-09 17:49:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:31,214 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-07-09 17:49:31,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-07-09 17:49:31,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:31,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:31,216 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:31,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-07-09 17:49:31,438 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 700350598, now seen corresponding path program 116 times [2021-07-09 17:49:31,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:31,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257823923] [2021-07-09 17:49:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:31,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:31,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257823923] [2021-07-09 17:49:31,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257823923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:31,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960954081] [2021-07-09 17:49:31,799 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 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 [2021-07-09 17:49:31,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:31,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:31,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960954081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:32,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:32,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:32,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626002880] [2021-07-09 17:49:32,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:32,186 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:32,775 INFO L93 Difference]: Finished difference Result 1870 states and 4636 transitions. [2021-07-09 17:49:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:32,777 INFO L225 Difference]: With dead ends: 1870 [2021-07-09 17:49:32,777 INFO L226 Difference]: Without dead ends: 1840 [2021-07-09 17:49:32,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1001.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:49:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-07-09 17:49:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1720. [2021-07-09 17:49:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 2.4904013961605584) internal successors, (4281), 1719 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 4281 transitions. [2021-07-09 17:49:32,797 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 4281 transitions. Word has length 32 [2021-07-09 17:49:32,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:32,797 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 4281 transitions. [2021-07-09 17:49:32,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:32,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 4281 transitions. [2021-07-09 17:49:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:32,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:32,800 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:33,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1550 [2021-07-09 17:49:33,017 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471366, now seen corresponding path program 117 times [2021-07-09 17:49:33,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:33,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12930920] [2021-07-09 17:49:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:33,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:33,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12930920] [2021-07-09 17:49:33,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12930920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:33,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847820859] [2021-07-09 17:49:33,441 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 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 [2021-07-09 17:49:33,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:49:33,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:33,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:33,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847820859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:33,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:33,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:33,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791260731] [2021-07-09 17:49:33,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:33,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:33,872 INFO L87 Difference]: Start difference. First operand 1720 states and 4281 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:34,508 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-07-09 17:49:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:49:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:34,511 INFO L225 Difference]: With dead ends: 2022 [2021-07-09 17:49:34,511 INFO L226 Difference]: Without dead ends: 1984 [2021-07-09 17:49:34,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 884.2ms TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:49:34,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-07-09 17:49:34,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1744. [2021-07-09 17:49:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.4905335628227196) internal successors, (4341), 1743 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 4341 transitions. [2021-07-09 17:49:34,532 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 4341 transitions. Word has length 32 [2021-07-09 17:49:34,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:34,532 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 4341 transitions. [2021-07-09 17:49:34,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 4341 transitions. [2021-07-09 17:49:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:34,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:34,534 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:34,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1565 [2021-07-09 17:49:34,741 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1236357566, now seen corresponding path program 118 times [2021-07-09 17:49:34,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:34,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107732554] [2021-07-09 17:49:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:35,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:35,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107732554] [2021-07-09 17:49:35,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107732554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:35,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309580183] [2021-07-09 17:49:35,008 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 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 [2021-07-09 17:49:35,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:35,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:35,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:35,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309580183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:35,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:35,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:35,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875774334] [2021-07-09 17:49:35,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:35,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:35,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:35,479 INFO L87 Difference]: Start difference. First operand 1744 states and 4341 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:36,070 INFO L93 Difference]: Finished difference Result 1910 states and 4736 transitions. [2021-07-09 17:49:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:36,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:36,072 INFO L225 Difference]: With dead ends: 1910 [2021-07-09 17:49:36,072 INFO L226 Difference]: Without dead ends: 1880 [2021-07-09 17:49:36,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 997.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:49:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-07-09 17:49:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1752. [2021-07-09 17:49:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-07-09 17:49:36,089 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-07-09 17:49:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:36,090 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-07-09 17:49:36,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-07-09 17:49:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:36,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:36,092 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:36,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1583 [2021-07-09 17:49:36,292 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1048667266, now seen corresponding path program 119 times [2021-07-09 17:49:36,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:36,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438236523] [2021-07-09 17:49:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:36,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:36,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438236523] [2021-07-09 17:49:36,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438236523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:36,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417044009] [2021-07-09 17:49:36,496 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 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 [2021-07-09 17:49:36,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:49:36,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:36,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:36,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:36,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417044009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:36,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:36,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:36,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291208679] [2021-07-09 17:49:36,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:36,926 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:37,472 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-07-09 17:49:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:37,475 INFO L225 Difference]: With dead ends: 1950 [2021-07-09 17:49:37,475 INFO L226 Difference]: Without dead ends: 1928 [2021-07-09 17:49:37,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:49:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-09 17:49:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1752. [2021-07-09 17:49:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:37,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-07-09 17:49:37,493 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-07-09 17:49:37,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:37,493 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-07-09 17:49:37,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-07-09 17:49:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:37,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:37,496 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:37,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-07-09 17:49:37,709 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 343764930, now seen corresponding path program 120 times [2021-07-09 17:49:37,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:37,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96462581] [2021-07-09 17:49:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:38,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96462581] [2021-07-09 17:49:38,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96462581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163837242] [2021-07-09 17:49:38,040 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 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 [2021-07-09 17:49:38,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:49:38,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:38,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163837242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:38,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:38,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:38,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408246342] [2021-07-09 17:49:38,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:38,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:38,515 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:39,457 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-07-09 17:49:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:49:39,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:39,460 INFO L225 Difference]: With dead ends: 1950 [2021-07-09 17:49:39,460 INFO L226 Difference]: Without dead ends: 1928 [2021-07-09 17:49:39,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1252.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:49:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-09 17:49:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1776. [2021-07-09 17:49:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-07-09 17:49:39,478 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-07-09 17:49:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:39,478 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-07-09 17:49:39,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-07-09 17:49:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:39,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:39,481 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:39,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1625 [2021-07-09 17:49:39,697 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004802, now seen corresponding path program 121 times [2021-07-09 17:49:39,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:39,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135049918] [2021-07-09 17:49:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:39,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:39,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135049918] [2021-07-09 17:49:39,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135049918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:39,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770090950] [2021-07-09 17:49:39,850 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 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 [2021-07-09 17:49:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:40,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770090950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:40,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:40,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:40,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513465060] [2021-07-09 17:49:40,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:40,352 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:41,171 INFO L93 Difference]: Finished difference Result 1942 states and 4820 transitions. [2021-07-09 17:49:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:41,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:41,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:41,174 INFO L225 Difference]: With dead ends: 1942 [2021-07-09 17:49:41,174 INFO L226 Difference]: Without dead ends: 1920 [2021-07-09 17:49:41,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1102.2ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:49:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-07-09 17:49:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1776. [2021-07-09 17:49:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-07-09 17:49:41,195 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-07-09 17:49:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:41,196 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-07-09 17:49:41,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-07-09 17:49:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:41,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:41,199 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:41,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-07-09 17:49:41,417 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1405252934, now seen corresponding path program 122 times [2021-07-09 17:49:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:41,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589882606] [2021-07-09 17:49:41,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:41,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:41,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589882606] [2021-07-09 17:49:41,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589882606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:41,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86888417] [2021-07-09 17:49:41,600 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 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 [2021-07-09 17:49:41,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:41,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:41,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:42,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86888417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:42,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:42,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:42,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745201993] [2021-07-09 17:49:42,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:42,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:42,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:42,067 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:42,839 INFO L93 Difference]: Finished difference Result 1966 states and 4872 transitions. [2021-07-09 17:49:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:49:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:42,842 INFO L225 Difference]: With dead ends: 1966 [2021-07-09 17:49:42,842 INFO L226 Difference]: Without dead ends: 1928 [2021-07-09 17:49:42,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1083.1ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:49:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-07-09 17:49:42,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1792. [2021-07-09 17:49:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 2.490787269681742) internal successors, (4461), 1791 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 4461 transitions. [2021-07-09 17:49:42,859 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 4461 transitions. Word has length 32 [2021-07-09 17:49:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:42,859 INFO L482 AbstractCegarLoop]: Abstraction has 1792 states and 4461 transitions. [2021-07-09 17:49:42,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 4461 transitions. [2021-07-09 17:49:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:42,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:42,862 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:43,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:43,081 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2028269506, now seen corresponding path program 123 times [2021-07-09 17:49:43,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:43,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467672884] [2021-07-09 17:49:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:43,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:43,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467672884] [2021-07-09 17:49:43,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467672884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:43,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146999077] [2021-07-09 17:49:43,385 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 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 [2021-07-09 17:49:43,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:49:43,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:43,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146999077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:43,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:43,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:43,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933236518] [2021-07-09 17:49:43,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:43,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:43,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:43,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:43,785 INFO L87 Difference]: Start difference. First operand 1792 states and 4461 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:44,424 INFO L93 Difference]: Finished difference Result 1966 states and 4876 transitions. [2021-07-09 17:49:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:44,427 INFO L225 Difference]: With dead ends: 1966 [2021-07-09 17:49:44,427 INFO L226 Difference]: Without dead ends: 1936 [2021-07-09 17:49:44,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:49:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-07-09 17:49:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1800. [2021-07-09 17:49:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 2.49082823790995) internal successors, (4481), 1799 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 4481 transitions. [2021-07-09 17:49:44,444 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 4481 transitions. Word has length 32 [2021-07-09 17:49:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:44,444 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 4481 transitions. [2021-07-09 17:49:44,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 4481 transitions. [2021-07-09 17:49:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:44,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:44,446 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:44,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-07-09 17:49:44,646 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:44,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:44,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1689931970, now seen corresponding path program 124 times [2021-07-09 17:49:44,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:44,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933725078] [2021-07-09 17:49:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:44,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:44,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933725078] [2021-07-09 17:49:44,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933725078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:44,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104276393] [2021-07-09 17:49:44,880 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 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 [2021-07-09 17:49:44,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:44,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:45,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104276393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:45,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:45,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:45,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400064735] [2021-07-09 17:49:45,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:45,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:45,332 INFO L87 Difference]: Start difference. First operand 1800 states and 4481 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:46,085 INFO L93 Difference]: Finished difference Result 2102 states and 5216 transitions. [2021-07-09 17:49:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:46,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:46,088 INFO L225 Difference]: With dead ends: 2102 [2021-07-09 17:49:46,088 INFO L226 Difference]: Without dead ends: 2072 [2021-07-09 17:49:46,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1065.4ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:49:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-07-09 17:49:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1816. [2021-07-09 17:49:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.4909090909090907) internal successors, (4521), 1815 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 4521 transitions. [2021-07-09 17:49:46,106 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 4521 transitions. Word has length 32 [2021-07-09 17:49:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:46,106 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 4521 transitions. [2021-07-09 17:49:46,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 4521 transitions. [2021-07-09 17:49:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:46,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:46,108 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:46,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-07-09 17:49:46,308 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash -59085894, now seen corresponding path program 125 times [2021-07-09 17:49:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:46,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335421424] [2021-07-09 17:49:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:46,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:46,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335421424] [2021-07-09 17:49:46,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335421424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:46,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649432842] [2021-07-09 17:49:46,528 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 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 [2021-07-09 17:49:46,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:49:46,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:46,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:46,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:47,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649432842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:47,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:47,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:47,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707981546] [2021-07-09 17:49:47,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:47,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:47,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:47,008 INFO L87 Difference]: Start difference. First operand 1816 states and 4521 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:47,735 INFO L93 Difference]: Finished difference Result 2070 states and 5140 transitions. [2021-07-09 17:49:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:49:47,736 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:47,738 INFO L225 Difference]: With dead ends: 2070 [2021-07-09 17:49:47,738 INFO L226 Difference]: Without dead ends: 2040 [2021-07-09 17:49:47,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1098.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:49:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-09 17:49:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1840. [2021-07-09 17:49:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 2.4910277324632952) internal successors, (4581), 1839 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 4581 transitions. [2021-07-09 17:49:47,755 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 4581 transitions. Word has length 32 [2021-07-09 17:49:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:47,756 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 4581 transitions. [2021-07-09 17:49:47,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 4581 transitions. [2021-07-09 17:49:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:47,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:47,757 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:47,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-07-09 17:49:47,958 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1216056506, now seen corresponding path program 126 times [2021-07-09 17:49:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989276456] [2021-07-09 17:49:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:48,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989276456] [2021-07-09 17:49:48,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989276456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579283608] [2021-07-09 17:49:48,176 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 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 [2021-07-09 17:49:48,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:49:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:48,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:48,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:48,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579283608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:48,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:48,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:48,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943185501] [2021-07-09 17:49:48,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:48,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:48,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:48,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:48,707 INFO L87 Difference]: Start difference. First operand 1840 states and 4581 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:49,472 INFO L93 Difference]: Finished difference Result 2150 states and 5328 transitions. [2021-07-09 17:49:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:49:49,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:49,475 INFO L225 Difference]: With dead ends: 2150 [2021-07-09 17:49:49,475 INFO L226 Difference]: Without dead ends: 2104 [2021-07-09 17:49:49,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1172.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:49:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-09 17:49:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1864. [2021-07-09 17:49:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.4911433172302737) internal successors, (4641), 1863 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4641 transitions. [2021-07-09 17:49:49,493 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4641 transitions. Word has length 32 [2021-07-09 17:49:49,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:49,493 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 4641 transitions. [2021-07-09 17:49:49,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4641 transitions. [2021-07-09 17:49:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:49,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:49,495 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:49,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:49,695 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:49,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:49,696 INFO L82 PathProgramCache]: Analyzing trace with hash 690028670, now seen corresponding path program 127 times [2021-07-09 17:49:49,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:49,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986955309] [2021-07-09 17:49:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:49,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:49,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986955309] [2021-07-09 17:49:49,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986955309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:49,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66650002] [2021-07-09 17:49:49,911 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 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 [2021-07-09 17:49:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66650002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:50,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:50,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927797861] [2021-07-09 17:49:50,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:50,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:50,279 INFO L87 Difference]: Start difference. First operand 1864 states and 4641 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:50,712 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-07-09 17:49:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:49:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:50,715 INFO L225 Difference]: With dead ends: 2022 [2021-07-09 17:49:50,715 INFO L226 Difference]: Without dead ends: 1984 [2021-07-09 17:49:50,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:49:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-07-09 17:49:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1880. [2021-07-09 17:49:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.491218733368813) internal successors, (4681), 1879 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 4681 transitions. [2021-07-09 17:49:50,733 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 4681 transitions. Word has length 32 [2021-07-09 17:49:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:50,733 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 4681 transitions. [2021-07-09 17:49:50,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 4681 transitions. [2021-07-09 17:49:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:50,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:50,735 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:50,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-07-09 17:49:50,935 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash 877718970, now seen corresponding path program 128 times [2021-07-09 17:49:50,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:50,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016062969] [2021-07-09 17:49:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:51,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016062969] [2021-07-09 17:49:51,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016062969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638324741] [2021-07-09 17:49:51,154 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 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 [2021-07-09 17:49:51,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:51,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638324741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:51,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:51,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:51,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074545295] [2021-07-09 17:49:51,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:51,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:51,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:51,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:51,629 INFO L87 Difference]: Start difference. First operand 1880 states and 4681 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:52,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:52,245 INFO L93 Difference]: Finished difference Result 2126 states and 5272 transitions. [2021-07-09 17:49:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:49:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:52,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:52,248 INFO L225 Difference]: With dead ends: 2126 [2021-07-09 17:49:52,248 INFO L226 Difference]: Without dead ends: 2080 [2021-07-09 17:49:52,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 952.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:49:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-07-09 17:49:52,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1920. [2021-07-09 17:49:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 2.4914017717561228) internal successors, (4781), 1919 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 4781 transitions. [2021-07-09 17:49:52,266 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 4781 transitions. Word has length 32 [2021-07-09 17:49:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:52,267 INFO L482 AbstractCegarLoop]: Abstraction has 1920 states and 4781 transitions. [2021-07-09 17:49:52,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 4781 transitions. [2021-07-09 17:49:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:52,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:52,269 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:52,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-07-09 17:49:52,469 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash -587357826, now seen corresponding path program 129 times [2021-07-09 17:49:52,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:52,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404311931] [2021-07-09 17:49:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:52,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:52,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404311931] [2021-07-09 17:49:52,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404311931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:52,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793521232] [2021-07-09 17:49:52,662 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 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 [2021-07-09 17:49:52,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:49:52,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:52,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:53,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793521232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:53,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:53,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:53,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37434190] [2021-07-09 17:49:53,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:53,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:53,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:53,035 INFO L87 Difference]: Start difference. First operand 1920 states and 4781 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:53,678 INFO L93 Difference]: Finished difference Result 2078 states and 5152 transitions. [2021-07-09 17:49:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:49:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:53,681 INFO L225 Difference]: With dead ends: 2078 [2021-07-09 17:49:53,681 INFO L226 Difference]: Without dead ends: 2040 [2021-07-09 17:49:53,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:49:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-09 17:49:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1912. [2021-07-09 17:49:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-07-09 17:49:53,699 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-07-09 17:49:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:53,699 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-07-09 17:49:53,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-07-09 17:49:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:53,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:53,701 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:53,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1801 [2021-07-09 17:49:53,902 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:53,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1197117250, now seen corresponding path program 130 times [2021-07-09 17:49:53,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:53,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741619637] [2021-07-09 17:49:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:54,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741619637] [2021-07-09 17:49:54,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741619637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:54,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146666692] [2021-07-09 17:49:54,144 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 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 [2021-07-09 17:49:54,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:49:54,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:54,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:54,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:54,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146666692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:54,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:54,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:54,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248545851] [2021-07-09 17:49:54,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:54,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:54,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:54,537 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:55,135 INFO L93 Difference]: Finished difference Result 2070 states and 5132 transitions. [2021-07-09 17:49:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:49:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:55,138 INFO L225 Difference]: With dead ends: 2070 [2021-07-09 17:49:55,138 INFO L226 Difference]: Without dead ends: 2032 [2021-07-09 17:49:55,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:49:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-07-09 17:49:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1912. [2021-07-09 17:49:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-07-09 17:49:55,155 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-07-09 17:49:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:55,155 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-07-09 17:49:55,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-07-09 17:49:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:55,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:55,157 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:55,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-07-09 17:49:55,358 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:55,358 INFO L82 PathProgramCache]: Analyzing trace with hash 991178818, now seen corresponding path program 131 times [2021-07-09 17:49:55,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:55,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649802808] [2021-07-09 17:49:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:55,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649802808] [2021-07-09 17:49:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649802808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126962746] [2021-07-09 17:49:55,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:49:55,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:49:55,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:55,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:56,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126962746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:56,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:56,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:56,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302964290] [2021-07-09 17:49:56,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:56,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:56,018 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:56,646 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-07-09 17:49:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:49:56,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:56,649 INFO L225 Difference]: With dead ends: 2142 [2021-07-09 17:49:56,649 INFO L226 Difference]: Without dead ends: 2112 [2021-07-09 17:49:56,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 975.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:49:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-07-09 17:49:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1928. [2021-07-09 17:49:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.4914374675661652) internal successors, (4801), 1927 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 4801 transitions. [2021-07-09 17:49:56,668 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 4801 transitions. Word has length 32 [2021-07-09 17:49:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:56,668 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 4801 transitions. [2021-07-09 17:49:56,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 4801 transitions. [2021-07-09 17:49:56,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:56,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:56,670 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:56,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1832 [2021-07-09 17:49:56,870 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:56,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash 652841282, now seen corresponding path program 132 times [2021-07-09 17:49:56,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:56,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990364266] [2021-07-09 17:49:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:57,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:57,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990364266] [2021-07-09 17:49:57,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990364266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896425443] [2021-07-09 17:49:57,077 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 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 [2021-07-09 17:49:57,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:49:57,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:57,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:57,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896425443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:57,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:57,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:57,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820776876] [2021-07-09 17:49:57,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:57,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:57,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:57,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:57,534 INFO L87 Difference]: Start difference. First operand 1928 states and 4801 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:58,170 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-07-09 17:49:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:49:58,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:58,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:58,172 INFO L225 Difference]: With dead ends: 2142 [2021-07-09 17:49:58,172 INFO L226 Difference]: Without dead ends: 2112 [2021-07-09 17:49:58,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 960.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:49:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-07-09 17:49:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1944. [2021-07-09 17:49:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 2.4915079773546065) internal successors, (4841), 1943 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 4841 transitions. [2021-07-09 17:49:58,190 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 4841 transitions. Word has length 32 [2021-07-09 17:49:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:58,190 INFO L482 AbstractCegarLoop]: Abstraction has 1944 states and 4841 transitions. [2021-07-09 17:49:58,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 4841 transitions. [2021-07-09 17:49:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:58,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:58,192 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:58,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:49:58,393 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash 634593150, now seen corresponding path program 133 times [2021-07-09 17:49:58,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:58,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496126515] [2021-07-09 17:49:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:58,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:58,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496126515] [2021-07-09 17:49:58,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496126515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:58,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035910911] [2021-07-09 17:49:58,614 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 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 [2021-07-09 17:49:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:49:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:49:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035910911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:58,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:49:58,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:49:58,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908967261] [2021-07-09 17:49:58,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:49:58,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:49:58,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:49:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:49:58,975 INFO L87 Difference]: Start difference. First operand 1944 states and 4841 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:49:59,500 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-07-09 17:49:59,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:49:59,500 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:49:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:49:59,502 INFO L225 Difference]: With dead ends: 2238 [2021-07-09 17:49:59,502 INFO L226 Difference]: Without dead ends: 2200 [2021-07-09 17:49:59,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:49:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-07-09 17:49:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1976. [2021-07-09 17:49:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.4916455696202533) internal successors, (4921), 1975 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 4921 transitions. [2021-07-09 17:49:59,522 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 4921 transitions. Word has length 32 [2021-07-09 17:49:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:49:59,522 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 4921 transitions. [2021-07-09 17:49:59,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:49:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 4921 transitions. [2021-07-09 17:49:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:49:59,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:49:59,524 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:49:59,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-07-09 17:49:59,724 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:49:59,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:49:59,724 INFO L82 PathProgramCache]: Analyzing trace with hash 343700418, now seen corresponding path program 134 times [2021-07-09 17:49:59,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:49:59,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973325864] [2021-07-09 17:49:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:49:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:49:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:49:59,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:49:59,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973325864] [2021-07-09 17:49:59,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973325864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:49:59,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855732904] [2021-07-09 17:49:59,939 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 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 [2021-07-09 17:49:59,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:49:59,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:49:59,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:49:59,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:00,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855732904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:00,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:00,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:00,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74776024] [2021-07-09 17:50:00,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:00,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:00,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:00,340 INFO L87 Difference]: Start difference. First operand 1976 states and 4921 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:01,208 INFO L93 Difference]: Finished difference Result 2278 states and 5656 transitions. [2021-07-09 17:50:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:50:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:01,211 INFO L225 Difference]: With dead ends: 2278 [2021-07-09 17:50:01,211 INFO L226 Difference]: Without dead ends: 2248 [2021-07-09 17:50:01,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1152.1ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:50:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-07-09 17:50:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1992. [2021-07-09 17:50:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 2.4917127071823204) internal successors, (4961), 1991 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:01,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 4961 transitions. [2021-07-09 17:50:01,231 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 4961 transitions. Word has length 32 [2021-07-09 17:50:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:01,231 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 4961 transitions. [2021-07-09 17:50:01,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 4961 transitions. [2021-07-09 17:50:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:01,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:01,233 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:01,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-07-09 17:50:01,433 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:01,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1571398014, now seen corresponding path program 135 times [2021-07-09 17:50:01,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:01,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481333406] [2021-07-09 17:50:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:01,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481333406] [2021-07-09 17:50:01,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481333406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053048818] [2021-07-09 17:50:01,716 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 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 [2021-07-09 17:50:01,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:50:01,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:01,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:02,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053048818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:02,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:02,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:02,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77748282] [2021-07-09 17:50:02,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:02,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:02,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:02,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:02,107 INFO L87 Difference]: Start difference. First operand 1992 states and 4961 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:02,758 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-07-09 17:50:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:02,761 INFO L225 Difference]: With dead ends: 2174 [2021-07-09 17:50:02,761 INFO L226 Difference]: Without dead ends: 2136 [2021-07-09 17:50:02,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 988.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-07-09 17:50:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2008. [2021-07-09 17:50:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.491778774289985) internal successors, (5001), 2007 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:02,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5001 transitions. [2021-07-09 17:50:02,780 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5001 transitions. Word has length 32 [2021-07-09 17:50:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:02,780 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 5001 transitions. [2021-07-09 17:50:02,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5001 transitions. [2021-07-09 17:50:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:02,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:02,782 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:02,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1891 [2021-07-09 17:50:02,983 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:02,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:02,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1759088314, now seen corresponding path program 136 times [2021-07-09 17:50:02,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:02,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304237963] [2021-07-09 17:50:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:03,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:03,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304237963] [2021-07-09 17:50:03,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304237963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:03,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093600210] [2021-07-09 17:50:03,204 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 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 [2021-07-09 17:50:03,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:03,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:03,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:03,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093600210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:03,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:03,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:03,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987580400] [2021-07-09 17:50:03,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:03,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:03,736 INFO L87 Difference]: Start difference. First operand 2008 states and 5001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:04,487 INFO L93 Difference]: Finished difference Result 2230 states and 5532 transitions. [2021-07-09 17:50:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:50:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:04,491 INFO L225 Difference]: With dead ends: 2230 [2021-07-09 17:50:04,491 INFO L226 Difference]: Without dead ends: 2192 [2021-07-09 17:50:04,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1096.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:50:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-07-09 17:50:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2024. [2021-07-09 17:50:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-07-09 17:50:04,511 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-07-09 17:50:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:04,512 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-07-09 17:50:04,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-07-09 17:50:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:04,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:04,514 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:04,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-07-09 17:50:04,714 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1039064706, now seen corresponding path program 137 times [2021-07-09 17:50:04,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:04,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790601481] [2021-07-09 17:50:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:04,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790601481] [2021-07-09 17:50:04,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790601481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:04,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261683556] [2021-07-09 17:50:04,979 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 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 [2021-07-09 17:50:05,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:50:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:05,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261683556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:05,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:05,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:05,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569170029] [2021-07-09 17:50:05,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:05,509 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:06,218 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-07-09 17:50:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:06,221 INFO L225 Difference]: With dead ends: 2238 [2021-07-09 17:50:06,221 INFO L226 Difference]: Without dead ends: 2200 [2021-07-09 17:50:06,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1165.0ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-07-09 17:50:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2032. [2021-07-09 17:50:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.4918759231905465) internal successors, (5061), 2031 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5061 transitions. [2021-07-09 17:50:06,241 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5061 transitions. Word has length 32 [2021-07-09 17:50:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:06,241 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5061 transitions. [2021-07-09 17:50:06,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5061 transitions. [2021-07-09 17:50:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:06,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:06,243 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:06,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1921,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:06,443 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:06,444 INFO L82 PathProgramCache]: Analyzing trace with hash -851374406, now seen corresponding path program 138 times [2021-07-09 17:50:06,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:06,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136139408] [2021-07-09 17:50:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:06,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136139408] [2021-07-09 17:50:06,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136139408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:06,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147278925] [2021-07-09 17:50:06,755 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 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 [2021-07-09 17:50:06,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:50:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:06,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:07,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147278925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:07,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:07,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:07,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996371763] [2021-07-09 17:50:07,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:07,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:07,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:07,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:07,301 INFO L87 Difference]: Start difference. First operand 2032 states and 5061 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:08,147 INFO L93 Difference]: Finished difference Result 2286 states and 5680 transitions. [2021-07-09 17:50:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:50:08,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:08,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:08,149 INFO L225 Difference]: With dead ends: 2286 [2021-07-09 17:50:08,149 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 17:50:08,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1362.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:50:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 17:50:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2024. [2021-07-09 17:50:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-07-09 17:50:08,168 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-07-09 17:50:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:08,168 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-07-09 17:50:08,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-07-09 17:50:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:08,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:08,170 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:08,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:08,371 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1377402242, now seen corresponding path program 139 times [2021-07-09 17:50:08,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:08,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524834789] [2021-07-09 17:50:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:08,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524834789] [2021-07-09 17:50:08,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524834789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:08,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135685676] [2021-07-09 17:50:08,586 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 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 [2021-07-09 17:50:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:08,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:09,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135685676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:09,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:09,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:09,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107767242] [2021-07-09 17:50:09,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:09,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:09,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:09,020 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:09,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:09,672 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-07-09 17:50:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:50:09,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:09,675 INFO L225 Difference]: With dead ends: 2174 [2021-07-09 17:50:09,675 INFO L226 Difference]: Without dead ends: 2136 [2021-07-09 17:50:09,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 998.3ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:50:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-07-09 17:50:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2024. [2021-07-09 17:50:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:09,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-07-09 17:50:09,694 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-07-09 17:50:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:09,694 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-07-09 17:50:09,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-07-09 17:50:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:09,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:09,695 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:09,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1959,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:09,896 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:09,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1189711942, now seen corresponding path program 140 times [2021-07-09 17:50:09,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:09,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010828360] [2021-07-09 17:50:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:10,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:10,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010828360] [2021-07-09 17:50:10,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010828360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:10,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29366527] [2021-07-09 17:50:10,120 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 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 [2021-07-09 17:50:10,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:10,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:10,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29366527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:10,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:10,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:10,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322844147] [2021-07-09 17:50:10,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:10,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:10,645 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:11,433 INFO L93 Difference]: Finished difference Result 2286 states and 5676 transitions. [2021-07-09 17:50:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:50:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:11,436 INFO L225 Difference]: With dead ends: 2286 [2021-07-09 17:50:11,436 INFO L226 Difference]: Without dead ends: 2248 [2021-07-09 17:50:11,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1214.7ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:50:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-07-09 17:50:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2024. [2021-07-09 17:50:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-07-09 17:50:11,456 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-07-09 17:50:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:11,456 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-07-09 17:50:11,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-07-09 17:50:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:11,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:11,458 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:11,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1976,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:11,659 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:11,659 INFO L82 PathProgramCache]: Analyzing trace with hash 85430458, now seen corresponding path program 141 times [2021-07-09 17:50:11,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:11,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021235819] [2021-07-09 17:50:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:11,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021235819] [2021-07-09 17:50:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021235819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624007197] [2021-07-09 17:50:11,823 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 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 [2021-07-09 17:50:11,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:50:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:12,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624007197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:12,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:12,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:12,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609871286] [2021-07-09 17:50:12,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:12,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:12,336 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:13,128 INFO L93 Difference]: Finished difference Result 2206 states and 5476 transitions. [2021-07-09 17:50:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:50:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:13,130 INFO L225 Difference]: With dead ends: 2206 [2021-07-09 17:50:13,130 INFO L226 Difference]: Without dead ends: 2176 [2021-07-09 17:50:13,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1137.3ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:50:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-07-09 17:50:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2048. [2021-07-09 17:50:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 2.4919394235466537) internal successors, (5101), 2047 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) [2021-07-09 17:50:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5101 transitions. [2021-07-09 17:50:13,150 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5101 transitions. Word has length 32 [2021-07-09 17:50:13,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:13,150 INFO L482 AbstractCegarLoop]: Abstraction has 2048 states and 5101 transitions. [2021-07-09 17:50:13,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5101 transitions. [2021-07-09 17:50:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:13,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:13,152 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:13,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-07-09 17:50:13,353 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash -120507974, now seen corresponding path program 142 times [2021-07-09 17:50:13,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:13,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178546064] [2021-07-09 17:50:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:13,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:13,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178546064] [2021-07-09 17:50:13,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178546064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:13,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57514450] [2021-07-09 17:50:13,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:50:13,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:13,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:13,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:13,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:14,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57514450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:14,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:14,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:14,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807218864] [2021-07-09 17:50:14,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:14,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:14,024 INFO L87 Difference]: Start difference. First operand 2048 states and 5101 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:14,756 INFO L93 Difference]: Finished difference Result 2278 states and 5660 transitions. [2021-07-09 17:50:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:50:14,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:14,759 INFO L225 Difference]: With dead ends: 2278 [2021-07-09 17:50:14,760 INFO L226 Difference]: Without dead ends: 2248 [2021-07-09 17:50:14,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1102.3ms TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:50:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-07-09 17:50:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2056. [2021-07-09 17:50:14,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.491970802919708) internal successors, (5121), 2055 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5121 transitions. [2021-07-09 17:50:14,779 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5121 transitions. Word has length 32 [2021-07-09 17:50:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:14,779 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5121 transitions. [2021-07-09 17:50:14,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:14,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5121 transitions. [2021-07-09 17:50:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:14,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:14,781 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:14,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-07-09 17:50:14,982 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash 67182326, now seen corresponding path program 143 times [2021-07-09 17:50:14,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:14,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535191331] [2021-07-09 17:50:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:15,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:15,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535191331] [2021-07-09 17:50:15,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535191331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:15,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225899877] [2021-07-09 17:50:15,262 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 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 [2021-07-09 17:50:15,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:50:15,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:15,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:15,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225899877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:15,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:15,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:15,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971850089] [2021-07-09 17:50:15,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:15,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:15,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:15,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:15,762 INFO L87 Difference]: Start difference. First operand 2056 states and 5121 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:16,459 INFO L93 Difference]: Finished difference Result 2238 states and 5556 transitions. [2021-07-09 17:50:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:16,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:16,462 INFO L225 Difference]: With dead ends: 2238 [2021-07-09 17:50:16,462 INFO L226 Difference]: Without dead ends: 2208 [2021-07-09 17:50:16,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1133.9ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-07-09 17:50:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2080. [2021-07-09 17:50:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.492063492063492) internal successors, (5181), 2079 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5181 transitions. [2021-07-09 17:50:16,481 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5181 transitions. Word has length 32 [2021-07-09 17:50:16,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:16,481 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5181 transitions. [2021-07-09 17:50:16,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5181 transitions. [2021-07-09 17:50:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:16,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:16,495 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:16,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-07-09 17:50:16,695 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:16,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2084499522, now seen corresponding path program 144 times [2021-07-09 17:50:16,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:16,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692383204] [2021-07-09 17:50:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:16,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:16,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692383204] [2021-07-09 17:50:16,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692383204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:16,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708592944] [2021-07-09 17:50:16,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:50:16,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:50:16,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:16,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:16,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:17,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708592944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:17,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:17,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:17,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755194936] [2021-07-09 17:50:17,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:17,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:17,190 INFO L87 Difference]: Start difference. First operand 2080 states and 5181 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:17,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:17,534 INFO L93 Difference]: Finished difference Result 2198 states and 5456 transitions. [2021-07-09 17:50:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:50:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:17,537 INFO L225 Difference]: With dead ends: 2198 [2021-07-09 17:50:17,537 INFO L226 Difference]: Without dead ends: 2176 [2021-07-09 17:50:17,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:50:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-07-09 17:50:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2064. [2021-07-09 17:50:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.49006301502666) internal successors, (5137), 2063 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5137 transitions. [2021-07-09 17:50:17,557 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5137 transitions. Word has length 32 [2021-07-09 17:50:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:17,557 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5137 transitions. [2021-07-09 17:50:17,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5137 transitions. [2021-07-09 17:50:17,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:17,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:17,559 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:17,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:17,760 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 619422726, now seen corresponding path program 145 times [2021-07-09 17:50:17,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:17,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520154664] [2021-07-09 17:50:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:17,931 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2021-07-09 17:50:18,189 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 7 [2021-07-09 17:50:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:18,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:18,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520154664] [2021-07-09 17:50:18,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520154664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:18,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537181070] [2021-07-09 17:50:18,261 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 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 [2021-07-09 17:50:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:18,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537181070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:18,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:18,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:18,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330830946] [2021-07-09 17:50:18,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:18,586 INFO L87 Difference]: Start difference. First operand 2064 states and 5137 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:18,989 INFO L93 Difference]: Finished difference Result 2230 states and 5536 transitions. [2021-07-09 17:50:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:18,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:18,991 INFO L225 Difference]: With dead ends: 2230 [2021-07-09 17:50:18,991 INFO L226 Difference]: Without dead ends: 2208 [2021-07-09 17:50:18,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-07-09 17:50:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2072. [2021-07-09 17:50:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-07-09 17:50:19,011 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-07-09 17:50:19,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:19,011 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-07-09 17:50:19,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-07-09 17:50:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:19,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:19,013 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:19,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:19,213 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1540223554, now seen corresponding path program 146 times [2021-07-09 17:50:19,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:19,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459134145] [2021-07-09 17:50:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:19,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:19,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459134145] [2021-07-09 17:50:19,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459134145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:19,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043879521] [2021-07-09 17:50:19,570 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 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 [2021-07-09 17:50:19,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:19,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:19,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043879521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:19,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:19,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:19,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624051106] [2021-07-09 17:50:19,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:19,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:19,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:19,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:19,992 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:20,559 INFO L93 Difference]: Finished difference Result 2246 states and 5572 transitions. [2021-07-09 17:50:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:20,560 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:20,562 INFO L225 Difference]: With dead ends: 2246 [2021-07-09 17:50:20,562 INFO L226 Difference]: Without dead ends: 2216 [2021-07-09 17:50:20,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 894.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-07-09 17:50:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2072. [2021-07-09 17:50:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-07-09 17:50:20,581 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-07-09 17:50:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:20,581 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-07-09 17:50:20,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-07-09 17:50:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:20,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:20,583 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:20,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2071 [2021-07-09 17:50:20,784 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:20,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:20,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1737475334, now seen corresponding path program 147 times [2021-07-09 17:50:20,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:20,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962715065] [2021-07-09 17:50:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:22,401 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 56 DAG size of output: 7 [2021-07-09 17:50:26,639 WARN L205 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 69 DAG size of output: 12 [2021-07-09 17:50:32,208 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2021-07-09 17:50:32,533 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-07-09 17:50:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:32,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962715065] [2021-07-09 17:50:32,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962715065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194598480] [2021-07-09 17:50:32,593 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 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 [2021-07-09 17:50:32,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:50:32,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:32,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:32,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:32,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194598480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:32,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:32,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957646588] [2021-07-09 17:50:32,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:32,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:32,955 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:33,767 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-07-09 17:50:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:50:33,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:33,770 INFO L225 Difference]: With dead ends: 2294 [2021-07-09 17:50:33,770 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 17:50:33,770 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1044.3ms TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:50:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 17:50:33,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2096. [2021-07-09 17:50:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-07-09 17:50:33,790 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-07-09 17:50:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:33,790 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-07-09 17:50:33,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-07-09 17:50:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:33,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:33,792 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:33,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:33,992 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1497849474, now seen corresponding path program 148 times [2021-07-09 17:50:33,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:33,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801495028] [2021-07-09 17:50:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:34,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:34,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801495028] [2021-07-09 17:50:34,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801495028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:34,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802372117] [2021-07-09 17:50:34,193 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 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 [2021-07-09 17:50:34,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:34,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:34,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:34,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:34,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802372117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:34,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:34,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:34,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602111375] [2021-07-09 17:50:34,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:34,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:34,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:34,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:34,654 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:35,243 INFO L93 Difference]: Finished difference Result 2406 states and 5972 transitions. [2021-07-09 17:50:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:35,243 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:35,246 INFO L225 Difference]: With dead ends: 2406 [2021-07-09 17:50:35,246 INFO L226 Difference]: Without dead ends: 2368 [2021-07-09 17:50:35,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 950.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-07-09 17:50:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2080. [2021-07-09 17:50:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-07-09 17:50:35,266 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-07-09 17:50:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:35,266 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-07-09 17:50:35,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-07-09 17:50:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:35,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:35,268 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:35,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:35,469 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159174, now seen corresponding path program 149 times [2021-07-09 17:50:35,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:35,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909132273] [2021-07-09 17:50:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:35,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:35,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909132273] [2021-07-09 17:50:35,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909132273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:35,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129415931] [2021-07-09 17:50:35,675 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 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 [2021-07-09 17:50:35,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:50:35,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:35,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:35,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:36,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129415931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:36,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:36,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:36,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917728453] [2021-07-09 17:50:36,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:36,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:36,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:36,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:36,172 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:36,924 INFO L93 Difference]: Finished difference Result 2414 states and 5996 transitions. [2021-07-09 17:50:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:50:36,925 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:36,928 INFO L225 Difference]: With dead ends: 2414 [2021-07-09 17:50:36,928 INFO L226 Difference]: Without dead ends: 2384 [2021-07-09 17:50:36,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1138.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:50:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-09 17:50:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2080. [2021-07-09 17:50:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-07-09 17:50:36,949 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-07-09 17:50:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:36,949 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-07-09 17:50:36,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-07-09 17:50:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:36,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:36,951 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:37,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-07-09 17:50:37,151 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1836187010, now seen corresponding path program 150 times [2021-07-09 17:50:37,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:37,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752349018] [2021-07-09 17:50:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:37,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752349018] [2021-07-09 17:50:37,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752349018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244798755] [2021-07-09 17:50:37,351 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 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 [2021-07-09 17:50:37,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:50:37,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:37,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:37,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:37,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244798755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:37,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:37,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:37,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901477365] [2021-07-09 17:50:37,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:37,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:37,715 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:38,294 INFO L93 Difference]: Finished difference Result 2214 states and 5488 transitions. [2021-07-09 17:50:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:50:38,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:38,296 INFO L225 Difference]: With dead ends: 2214 [2021-07-09 17:50:38,296 INFO L226 Difference]: Without dead ends: 2176 [2021-07-09 17:50:38,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 793.8ms TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:50:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-07-09 17:50:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2096. [2021-07-09 17:50:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-07-09 17:50:38,315 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-07-09 17:50:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:38,315 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-07-09 17:50:38,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-07-09 17:50:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:38,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:38,317 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:38,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-07-09 17:50:38,517 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:38,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1648496710, now seen corresponding path program 151 times [2021-07-09 17:50:38,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:38,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259859566] [2021-07-09 17:50:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:38,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:38,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259859566] [2021-07-09 17:50:38,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259859566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:38,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739444299] [2021-07-09 17:50:38,666 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 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 [2021-07-09 17:50:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:39,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739444299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:39,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:39,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:39,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353990905] [2021-07-09 17:50:39,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:39,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:39,146 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:39,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:39,729 INFO L93 Difference]: Finished difference Result 2366 states and 5864 transitions. [2021-07-09 17:50:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:50:39,729 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:39,732 INFO L225 Difference]: With dead ends: 2366 [2021-07-09 17:50:39,732 INFO L226 Difference]: Without dead ends: 2320 [2021-07-09 17:50:39,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 859.8ms TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:50:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-09 17:50:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2096. [2021-07-09 17:50:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-07-09 17:50:39,752 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-07-09 17:50:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:39,752 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-07-09 17:50:39,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-07-09 17:50:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:39,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:39,754 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:39,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2175,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:39,955 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:39,955 INFO L82 PathProgramCache]: Analyzing trace with hash 54255998, now seen corresponding path program 152 times [2021-07-09 17:50:39,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:39,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871362530] [2021-07-09 17:50:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:40,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:40,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871362530] [2021-07-09 17:50:40,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871362530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551158072] [2021-07-09 17:50:40,244 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 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 [2021-07-09 17:50:40,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:40,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:40,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:40,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:40,712 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-07-09 17:50:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:40,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551158072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:40,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:40,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:40,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516559739] [2021-07-09 17:50:40,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:40,860 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:41,580 INFO L93 Difference]: Finished difference Result 2278 states and 5652 transitions. [2021-07-09 17:50:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:41,583 INFO L225 Difference]: With dead ends: 2278 [2021-07-09 17:50:41,583 INFO L226 Difference]: Without dead ends: 2248 [2021-07-09 17:50:41,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1292.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-07-09 17:50:41,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2096. [2021-07-09 17:50:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-07-09 17:50:41,603 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-07-09 17:50:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:41,603 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-07-09 17:50:41,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-07-09 17:50:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:41,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:41,605 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:41,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2192 [2021-07-09 17:50:41,806 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash 36007866, now seen corresponding path program 153 times [2021-07-09 17:50:41,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:41,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198048671] [2021-07-09 17:50:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:42,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:42,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198048671] [2021-07-09 17:50:42,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198048671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:42,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782717287] [2021-07-09 17:50:42,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:50:42,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:50:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:42,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:42,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:42,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782717287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:42,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:42,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:42,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413682805] [2021-07-09 17:50:42,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:42,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:42,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:42,570 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:43,459 INFO L93 Difference]: Finished difference Result 2414 states and 5992 transitions. [2021-07-09 17:50:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:50:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:43,462 INFO L225 Difference]: With dead ends: 2414 [2021-07-09 17:50:43,462 INFO L226 Difference]: Without dead ends: 2384 [2021-07-09 17:50:43,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1327.0ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:50:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-09 17:50:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2104. [2021-07-09 17:50:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.4902520209224916) internal successors, (5237), 2103 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) [2021-07-09 17:50:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 5237 transitions. [2021-07-09 17:50:43,482 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 5237 transitions. Word has length 32 [2021-07-09 17:50:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:43,482 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 5237 transitions. [2021-07-09 17:50:43,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 5237 transitions. [2021-07-09 17:50:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:43,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:43,484 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:43,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2210 [2021-07-09 17:50:43,685 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1767406466, now seen corresponding path program 154 times [2021-07-09 17:50:43,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399263319] [2021-07-09 17:50:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:43,934 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2021-07-09 17:50:44,214 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-07-09 17:50:44,496 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2021-07-09 17:50:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:44,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:44,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399263319] [2021-07-09 17:50:44,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399263319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:44,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212882442] [2021-07-09 17:50:44,603 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 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 [2021-07-09 17:50:44,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:44,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:45,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212882442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:45,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:45,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:45,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475549412] [2021-07-09 17:50:45,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:45,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:45,100 INFO L87 Difference]: Start difference. First operand 2104 states and 5237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:45,814 INFO L93 Difference]: Finished difference Result 2390 states and 5932 transitions. [2021-07-09 17:50:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:50:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:45,817 INFO L225 Difference]: With dead ends: 2390 [2021-07-09 17:50:45,817 INFO L226 Difference]: Without dead ends: 2360 [2021-07-09 17:50:45,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1129.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:50:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-07-09 17:50:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2144. [2021-07-09 17:50:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 2.490433971068595) internal successors, (5337), 2143 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 5337 transitions. [2021-07-09 17:50:45,838 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 5337 transitions. Word has length 32 [2021-07-09 17:50:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:45,838 INFO L482 AbstractCegarLoop]: Abstraction has 2144 states and 5337 transitions. [2021-07-09 17:50:45,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 5337 transitions. [2021-07-09 17:50:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:45,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:45,840 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:46,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-07-09 17:50:46,041 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash -320577802, now seen corresponding path program 155 times [2021-07-09 17:50:46,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:46,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696154811] [2021-07-09 17:50:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:46,517 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-07-09 17:50:46,969 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 27 [2021-07-09 17:50:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:47,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:47,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696154811] [2021-07-09 17:50:47,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696154811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:47,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272726245] [2021-07-09 17:50:47,110 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 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 [2021-07-09 17:50:47,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:50:47,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:47,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:47,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272726245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:47,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:47,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:47,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716165493] [2021-07-09 17:50:47,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:47,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:47,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:47,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:47,612 INFO L87 Difference]: Start difference. First operand 2144 states and 5337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:48,318 INFO L93 Difference]: Finished difference Result 2326 states and 5772 transitions. [2021-07-09 17:50:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:50:48,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:48,321 INFO L225 Difference]: With dead ends: 2326 [2021-07-09 17:50:48,321 INFO L226 Difference]: Without dead ends: 2296 [2021-07-09 17:50:48,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1148.1ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:50:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-07-09 17:50:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2160. [2021-07-09 17:50:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 2.490504863362668) internal successors, (5377), 2159 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 5377 transitions. [2021-07-09 17:50:48,340 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 5377 transitions. Word has length 32 [2021-07-09 17:50:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:48,340 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 5377 transitions. [2021-07-09 17:50:48,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 5377 transitions. [2021-07-09 17:50:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:48,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:48,342 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:48,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2249 [2021-07-09 17:50:48,543 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash 972812730, now seen corresponding path program 156 times [2021-07-09 17:50:48,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:48,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072991557] [2021-07-09 17:50:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:48,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:48,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072991557] [2021-07-09 17:50:48,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072991557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:48,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535412241] [2021-07-09 17:50:48,744 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 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 [2021-07-09 17:50:48,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:50:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:49,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535412241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:49,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:49,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:49,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457471089] [2021-07-09 17:50:49,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:49,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:49,274 INFO L87 Difference]: Start difference. First operand 2160 states and 5377 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:50,105 INFO L93 Difference]: Finished difference Result 2374 states and 5888 transitions. [2021-07-09 17:50:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:50:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:50,108 INFO L225 Difference]: With dead ends: 2374 [2021-07-09 17:50:50,108 INFO L226 Difference]: Without dead ends: 2336 [2021-07-09 17:50:50,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1186.0ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:50:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-07-09 17:50:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2168. [2021-07-09 17:50:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 2.490539916935856) internal successors, (5397), 2167 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 5397 transitions. [2021-07-09 17:50:50,128 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 5397 transitions. Word has length 32 [2021-07-09 17:50:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:50,128 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 5397 transitions. [2021-07-09 17:50:50,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 5397 transitions. [2021-07-09 17:50:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:50,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:50,130 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:50,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-07-09 17:50:50,331 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:50,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:50,331 INFO L82 PathProgramCache]: Analyzing trace with hash -492264066, now seen corresponding path program 157 times [2021-07-09 17:50:50,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:50,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058624389] [2021-07-09 17:50:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:50,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:50,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058624389] [2021-07-09 17:50:50,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058624389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:50,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962789165] [2021-07-09 17:50:50,539 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 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 [2021-07-09 17:50:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:50,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962789165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:50,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:50,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641092158] [2021-07-09 17:50:51,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:51,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:51,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:51,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:51,000 INFO L87 Difference]: Start difference. First operand 2168 states and 5397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:51,783 INFO L93 Difference]: Finished difference Result 2470 states and 6128 transitions. [2021-07-09 17:50:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:50:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:51,785 INFO L225 Difference]: With dead ends: 2470 [2021-07-09 17:50:51,785 INFO L226 Difference]: Without dead ends: 2432 [2021-07-09 17:50:51,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1141.5ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:50:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-07-09 17:50:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2176. [2021-07-09 17:50:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 2.4905747126436784) internal successors, (5417), 2175 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 5417 transitions. [2021-07-09 17:50:51,806 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 5417 transitions. Word has length 32 [2021-07-09 17:50:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:51,806 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 5417 transitions. [2021-07-09 17:50:51,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 5417 transitions. [2021-07-09 17:50:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:51,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:51,808 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:52,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2291,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:52,009 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 954564598, now seen corresponding path program 158 times [2021-07-09 17:50:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:52,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121375945] [2021-07-09 17:50:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:52,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:52,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121375945] [2021-07-09 17:50:52,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121375945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:52,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909816752] [2021-07-09 17:50:52,194 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 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 [2021-07-09 17:50:52,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:50:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:52,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909816752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:52,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:52,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:52,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099061229] [2021-07-09 17:50:52,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:52,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:52,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:52,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:52,682 INFO L87 Difference]: Start difference. First operand 2176 states and 5417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:53,296 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-07-09 17:50:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:50:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:53,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:53,299 INFO L225 Difference]: With dead ends: 2430 [2021-07-09 17:50:53,299 INFO L226 Difference]: Without dead ends: 2400 [2021-07-09 17:50:53,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 998.9ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:50:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-09 17:50:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2192. [2021-07-09 17:50:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-07-09 17:50:53,320 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-07-09 17:50:53,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:53,320 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-07-09 17:50:53,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-07-09 17:50:53,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:53,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:53,322 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:53,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2312 [2021-07-09 17:50:53,523 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:53,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1947970502, now seen corresponding path program 159 times [2021-07-09 17:50:53,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:53,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214254999] [2021-07-09 17:50:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:53,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214254999] [2021-07-09 17:50:53,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214254999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:53,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740229438] [2021-07-09 17:50:53,743 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 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 [2021-07-09 17:50:53,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:50:53,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:53,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:54,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740229438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:54,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:54,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:54,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65610940] [2021-07-09 17:50:54,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:54,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:54,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:54,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:54,327 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:55,157 INFO L93 Difference]: Finished difference Result 2486 states and 6168 transitions. [2021-07-09 17:50:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:50:55,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:55,160 INFO L225 Difference]: With dead ends: 2486 [2021-07-09 17:50:55,160 INFO L226 Difference]: Without dead ends: 2448 [2021-07-09 17:50:55,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1287.5ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:50:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-07-09 17:50:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2216. [2021-07-09 17:50:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 2.490744920993228) internal successors, (5517), 2215 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 5517 transitions. [2021-07-09 17:50:55,181 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 5517 transitions. Word has length 32 [2021-07-09 17:50:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:55,181 INFO L482 AbstractCegarLoop]: Abstraction has 2216 states and 5517 transitions. [2021-07-09 17:50:55,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 5517 transitions. [2021-07-09 17:50:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:55,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:55,184 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:55,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2330,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:55,384 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:55,384 INFO L82 PathProgramCache]: Analyzing trace with hash 616227062, now seen corresponding path program 160 times [2021-07-09 17:50:55,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:55,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26838425] [2021-07-09 17:50:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:55,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:55,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26838425] [2021-07-09 17:50:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26838425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:55,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462469084] [2021-07-09 17:50:55,623 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 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 [2021-07-09 17:50:55,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:50:55,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:56,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462469084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:56,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:56,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:56,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318225810] [2021-07-09 17:50:56,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:56,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:56,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:56,188 INFO L87 Difference]: Start difference. First operand 2216 states and 5517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:56,949 INFO L93 Difference]: Finished difference Result 2382 states and 5916 transitions. [2021-07-09 17:50:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:50:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:56,952 INFO L225 Difference]: With dead ends: 2382 [2021-07-09 17:50:56,952 INFO L226 Difference]: Without dead ends: 2360 [2021-07-09 17:50:56,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1159.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:50:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-07-09 17:50:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2200. [2021-07-09 17:50:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-07-09 17:50:56,972 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-07-09 17:50:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:56,973 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-07-09 17:50:56,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-07-09 17:50:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:56,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:56,975 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:57,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2355 [2021-07-09 17:50:57,175 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:57,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash 747935042, now seen corresponding path program 161 times [2021-07-09 17:50:57,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:57,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696270232] [2021-07-09 17:50:57,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:57,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:57,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696270232] [2021-07-09 17:50:57,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696270232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:57,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768902184] [2021-07-09 17:50:57,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:50:57,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:50:57,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:50:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:57,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768902184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:57,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:57,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:57,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491695858] [2021-07-09 17:50:57,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:57,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:57,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:57,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:57,823 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:50:58,488 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-07-09 17:50:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:50:58,488 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:50:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:50:58,491 INFO L225 Difference]: With dead ends: 2294 [2021-07-09 17:50:58,491 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 17:50:58,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 940.6ms TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:50:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 17:50:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2200. [2021-07-09 17:50:58,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-07-09 17:50:58,509 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-07-09 17:50:58,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:50:58,509 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-07-09 17:50:58,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:50:58,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-07-09 17:50:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:50:58,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:50:58,511 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:50:58,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:50:58,712 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:50:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:50:58,712 INFO L82 PathProgramCache]: Analyzing trace with hash -836348222, now seen corresponding path program 162 times [2021-07-09 17:50:58,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:50:58,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415976028] [2021-07-09 17:50:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:50:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:50:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:58,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:50:58,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415976028] [2021-07-09 17:50:58,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415976028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:58,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019675629] [2021-07-09 17:50:58,843 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 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 [2021-07-09 17:50:58,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:50:58,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:50:58,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:50:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:50:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:50:59,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019675629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:50:59,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:50:59,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:50:59,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838231926] [2021-07-09 17:50:59,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:50:59,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:50:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:50:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:50:59,259 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:00,017 INFO L93 Difference]: Finished difference Result 2366 states and 5872 transitions. [2021-07-09 17:51:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:51:00,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:00,021 INFO L225 Difference]: With dead ends: 2366 [2021-07-09 17:51:00,021 INFO L226 Difference]: Without dead ends: 2336 [2021-07-09 17:51:00,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-07-09 17:51:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2200. [2021-07-09 17:51:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-07-09 17:51:00,042 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-07-09 17:51:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:00,042 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-07-09 17:51:00,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-07-09 17:51:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:00,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:00,044 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:00,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2384,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:00,244 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash 579039674, now seen corresponding path program 163 times [2021-07-09 17:51:00,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:00,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948981209] [2021-07-09 17:51:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:00,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948981209] [2021-07-09 17:51:00,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948981209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:00,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755994692] [2021-07-09 17:51:00,443 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 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 [2021-07-09 17:51:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:00,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755994692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:00,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:00,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:00,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891307870] [2021-07-09 17:51:00,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:00,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:00,957 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:01,644 INFO L93 Difference]: Finished difference Result 2510 states and 6228 transitions. [2021-07-09 17:51:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:01,647 INFO L225 Difference]: With dead ends: 2510 [2021-07-09 17:51:01,647 INFO L226 Difference]: Without dead ends: 2472 [2021-07-09 17:51:01,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1082.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-07-09 17:51:01,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2192. [2021-07-09 17:51:01,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-07-09 17:51:01,669 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-07-09 17:51:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:01,669 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-07-09 17:51:01,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:01,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-07-09 17:51:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:01,671 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:01,671 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:01,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:01,871 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:01,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1854182074, now seen corresponding path program 164 times [2021-07-09 17:51:01,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872442966] [2021-07-09 17:51:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:02,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:02,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872442966] [2021-07-09 17:51:02,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872442966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:02,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258670840] [2021-07-09 17:51:02,068 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 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 [2021-07-09 17:51:02,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:02,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:02,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258670840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:02,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:02,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:02,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820560867] [2021-07-09 17:51:02,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:02,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:02,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:02,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:02,608 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:02,798 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-07-09 17:51:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:03,434 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-07-09 17:51:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:51:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:03,437 INFO L225 Difference]: With dead ends: 2446 [2021-07-09 17:51:03,437 INFO L226 Difference]: Without dead ends: 2408 [2021-07-09 17:51:03,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1240.0ms TimeCoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-07-09 17:51:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2208. [2021-07-09 17:51:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.490711372904395) internal successors, (5497), 2207 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) [2021-07-09 17:51:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 5497 transitions. [2021-07-09 17:51:03,459 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 5497 transitions. Word has length 32 [2021-07-09 17:51:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:03,459 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 5497 transitions. [2021-07-09 17:51:03,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 5497 transitions. [2021-07-09 17:51:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:03,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:03,462 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:03,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:03,663 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:03,663 INFO L82 PathProgramCache]: Analyzing trace with hash 389105278, now seen corresponding path program 165 times [2021-07-09 17:51:03,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:03,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393091867] [2021-07-09 17:51:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:03,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:03,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393091867] [2021-07-09 17:51:03,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393091867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:03,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240073042] [2021-07-09 17:51:03,893 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 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 [2021-07-09 17:51:03,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:51:03,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:03,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:04,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240073042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:04,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:04,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:04,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574593997] [2021-07-09 17:51:04,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:04,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:04,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:04,263 INFO L87 Difference]: Start difference. First operand 2208 states and 5497 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:05,004 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-07-09 17:51:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:51:05,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:05,008 INFO L225 Difference]: With dead ends: 2534 [2021-07-09 17:51:05,008 INFO L226 Difference]: Without dead ends: 2496 [2021-07-09 17:51:05,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1023.0ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:51:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-07-09 17:51:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2240. [2021-07-09 17:51:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-07-09 17:51:05,030 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-07-09 17:51:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:05,030 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-07-09 17:51:05,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-07-09 17:51:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:05,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:05,033 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:05,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-07-09 17:51:05,233 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1648243642, now seen corresponding path program 166 times [2021-07-09 17:51:05,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:05,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343031950] [2021-07-09 17:51:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:05,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343031950] [2021-07-09 17:51:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343031950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798670533] [2021-07-09 17:51:05,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:51:05,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:05,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:05,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:05,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798670533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:05,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:05,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:05,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870015470] [2021-07-09 17:51:05,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:05,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:05,882 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:06,589 INFO L93 Difference]: Finished difference Result 2470 states and 6132 transitions. [2021-07-09 17:51:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:06,593 INFO L225 Difference]: With dead ends: 2470 [2021-07-09 17:51:06,593 INFO L226 Difference]: Without dead ends: 2440 [2021-07-09 17:51:06,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1038.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:51:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-07-09 17:51:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2248. [2021-07-09 17:51:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-07-09 17:51:06,614 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-07-09 17:51:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:06,614 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-07-09 17:51:06,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-07-09 17:51:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:06,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:06,616 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:06,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2457 [2021-07-09 17:51:06,817 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1835933942, now seen corresponding path program 167 times [2021-07-09 17:51:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:06,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800773519] [2021-07-09 17:51:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:06,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:06,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800773519] [2021-07-09 17:51:06,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800773519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:06,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004617268] [2021-07-09 17:51:06,999 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 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 [2021-07-09 17:51:07,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:51:07,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:07,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:07,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004617268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:07,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:07,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299599147] [2021-07-09 17:51:07,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:07,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:07,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:07,489 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:08,130 INFO L93 Difference]: Finished difference Result 2502 states and 6216 transitions. [2021-07-09 17:51:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:08,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:08,133 INFO L225 Difference]: With dead ends: 2502 [2021-07-09 17:51:08,133 INFO L226 Difference]: Without dead ends: 2472 [2021-07-09 17:51:08,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1027.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-07-09 17:51:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2224. [2021-07-09 17:51:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-07-09 17:51:08,155 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-07-09 17:51:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:08,156 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-07-09 17:51:08,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-07-09 17:51:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:08,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:08,158 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:08,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2471,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:08,358 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1066601158, now seen corresponding path program 168 times [2021-07-09 17:51:08,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:08,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268555530] [2021-07-09 17:51:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:08,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:08,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268555530] [2021-07-09 17:51:08,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268555530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:08,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103146028] [2021-07-09 17:51:08,571 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 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 [2021-07-09 17:51:08,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:51:08,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:09,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103146028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:09,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:09,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:09,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197681626] [2021-07-09 17:51:09,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:09,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:09,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:09,131 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:09,926 INFO L93 Difference]: Finished difference Result 2478 states and 6156 transitions. [2021-07-09 17:51:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:09,926 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:09,929 INFO L225 Difference]: With dead ends: 2478 [2021-07-09 17:51:09,929 INFO L226 Difference]: Without dead ends: 2456 [2021-07-09 17:51:09,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1257.5ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:51:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-07-09 17:51:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2232. [2021-07-09 17:51:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-07-09 17:51:09,951 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-07-09 17:51:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:09,951 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-07-09 17:51:09,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-07-09 17:51:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:09,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:09,953 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:10,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2487 [2021-07-09 17:51:10,153 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1497596406, now seen corresponding path program 169 times [2021-07-09 17:51:10,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:10,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909942032] [2021-07-09 17:51:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909942032] [2021-07-09 17:51:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909942032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871381562] [2021-07-09 17:51:10,350 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 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 [2021-07-09 17:51:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:10,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:10,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871381562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:10,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:10,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:10,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750989686] [2021-07-09 17:51:10,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:10,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:10,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:10,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:10,879 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:11,591 INFO L93 Difference]: Finished difference Result 2406 states and 5976 transitions. [2021-07-09 17:51:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:11,594 INFO L225 Difference]: With dead ends: 2406 [2021-07-09 17:51:11,594 INFO L226 Difference]: Without dead ends: 2384 [2021-07-09 17:51:11,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1107.0ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-07-09 17:51:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2224. [2021-07-09 17:51:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-07-09 17:51:11,628 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-07-09 17:51:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:11,628 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-07-09 17:51:11,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-07-09 17:51:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:11,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:11,630 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:11,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-07-09 17:51:11,831 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:11,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 617903418, now seen corresponding path program 170 times [2021-07-09 17:51:11,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:11,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010819911] [2021-07-09 17:51:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:12,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010819911] [2021-07-09 17:51:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010819911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106896437] [2021-07-09 17:51:12,034 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 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 [2021-07-09 17:51:12,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:12,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:12,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106896437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:12,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:12,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:12,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328310639] [2021-07-09 17:51:12,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:12,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:12,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:12,530 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:13,213 INFO L93 Difference]: Finished difference Result 2366 states and 5868 transitions. [2021-07-09 17:51:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:13,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:13,216 INFO L225 Difference]: With dead ends: 2366 [2021-07-09 17:51:13,216 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 17:51:13,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 981.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 17:51:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2232. [2021-07-09 17:51:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-07-09 17:51:13,236 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-07-09 17:51:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:13,236 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-07-09 17:51:13,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-07-09 17:51:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:13,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:13,239 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:13,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:13,439 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1638894150, now seen corresponding path program 171 times [2021-07-09 17:51:13,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:13,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153949264] [2021-07-09 17:51:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:13,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:13,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153949264] [2021-07-09 17:51:13,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153949264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:13,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770592125] [2021-07-09 17:51:13,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:51:13,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:51:13,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:13,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:13,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:14,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770592125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:14,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:14,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:14,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968831758] [2021-07-09 17:51:14,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:14,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:14,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:14,018 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:14,825 INFO L93 Difference]: Finished difference Result 2422 states and 6016 transitions. [2021-07-09 17:51:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:51:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:14,828 INFO L225 Difference]: With dead ends: 2422 [2021-07-09 17:51:14,828 INFO L226 Difference]: Without dead ends: 2392 [2021-07-09 17:51:14,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1044.3ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:51:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-07-09 17:51:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2232. [2021-07-09 17:51:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-07-09 17:51:14,849 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-07-09 17:51:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:14,849 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-07-09 17:51:14,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-07-09 17:51:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:14,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:14,851 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:15,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-07-09 17:51:15,051 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1657142282, now seen corresponding path program 172 times [2021-07-09 17:51:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:15,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507189627] [2021-07-09 17:51:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:15,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:15,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507189627] [2021-07-09 17:51:15,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507189627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:15,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153866124] [2021-07-09 17:51:15,252 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 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 [2021-07-09 17:51:15,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:15,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153866124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:15,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:15,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:15,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588447909] [2021-07-09 17:51:15,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:15,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:15,716 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:16,228 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-07-09 17:51:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:16,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:16,231 INFO L225 Difference]: With dead ends: 2430 [2021-07-09 17:51:16,231 INFO L226 Difference]: Without dead ends: 2400 [2021-07-09 17:51:16,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 878.7ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:51:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-07-09 17:51:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2240. [2021-07-09 17:51:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-07-09 17:51:16,253 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-07-09 17:51:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:16,253 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-07-09 17:51:16,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-07-09 17:51:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:16,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:16,255 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:16,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-07-09 17:51:16,455 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:16,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1948035014, now seen corresponding path program 173 times [2021-07-09 17:51:16,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:16,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939814805] [2021-07-09 17:51:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:16,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:16,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939814805] [2021-07-09 17:51:16,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939814805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:16,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516830863] [2021-07-09 17:51:16,727 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 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 [2021-07-09 17:51:16,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:51:16,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:16,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:51:16,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:17,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516830863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:17,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:17,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:17,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593487537] [2021-07-09 17:51:17,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:17,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:17,084 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:17,519 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-07-09 17:51:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:51:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:17,522 INFO L225 Difference]: With dead ends: 2334 [2021-07-09 17:51:17,522 INFO L226 Difference]: Without dead ends: 2304 [2021-07-09 17:51:17,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 791.8ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:51:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-07-09 17:51:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2240. [2021-07-09 17:51:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-07-09 17:51:17,542 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-07-09 17:51:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:17,542 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-07-09 17:51:17,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-07-09 17:51:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:17,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:17,544 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:17,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2582,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:17,745 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1198122614, now seen corresponding path program 174 times [2021-07-09 17:51:17,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:17,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029727167] [2021-07-09 17:51:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:17,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:17,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029727167] [2021-07-09 17:51:17,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029727167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:17,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593152636] [2021-07-09 17:51:17,932 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 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 [2021-07-09 17:51:17,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:51:17,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:18,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593152636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:18,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:18,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:18,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072231237] [2021-07-09 17:51:18,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:18,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:18,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:18,319 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:18,911 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-07-09 17:51:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:18,914 INFO L225 Difference]: With dead ends: 2334 [2021-07-09 17:51:18,914 INFO L226 Difference]: Without dead ends: 2304 [2021-07-09 17:51:18,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-07-09 17:51:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2248. [2021-07-09 17:51:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-07-09 17:51:18,935 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-07-09 17:51:18,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:18,935 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-07-09 17:51:18,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-07-09 17:51:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:18,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:18,937 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:19,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2590 [2021-07-09 17:51:19,137 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:19,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1997723914, now seen corresponding path program 175 times [2021-07-09 17:51:19,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:19,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965911053] [2021-07-09 17:51:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:19,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:19,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965911053] [2021-07-09 17:51:19,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965911053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:19,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804334423] [2021-07-09 17:51:19,345 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 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 [2021-07-09 17:51:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:19,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:19,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804334423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:19,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:19,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425780079] [2021-07-09 17:51:19,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:19,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:19,727 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:20,262 INFO L93 Difference]: Finished difference Result 2358 states and 5852 transitions. [2021-07-09 17:51:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:20,265 INFO L225 Difference]: With dead ends: 2358 [2021-07-09 17:51:20,265 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 17:51:20,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 837.9ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 17:51:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2240. [2021-07-09 17:51:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-07-09 17:51:20,286 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-07-09 17:51:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:20,286 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-07-09 17:51:20,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-07-09 17:51:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:20,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:20,289 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:20,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2614,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:20,489 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 142122878, now seen corresponding path program 176 times [2021-07-09 17:51:20,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:20,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905194838] [2021-07-09 17:51:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:20,802 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 15 [2021-07-09 17:51:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:20,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905194838] [2021-07-09 17:51:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905194838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:20,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496526243] [2021-07-09 17:51:20,971 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 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 [2021-07-09 17:51:20,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:20,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:21,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496526243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:21,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:21,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:21,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042354154] [2021-07-09 17:51:21,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:21,367 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:21,876 INFO L93 Difference]: Finished difference Result 2350 states and 5836 transitions. [2021-07-09 17:51:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:21,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:21,879 INFO L225 Difference]: With dead ends: 2350 [2021-07-09 17:51:21,879 INFO L226 Difference]: Without dead ends: 2328 [2021-07-09 17:51:21,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 736.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-09 17:51:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2256. [2021-07-09 17:51:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.4909090909090907) internal successors, (5617), 2255 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 5617 transitions. [2021-07-09 17:51:21,901 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 5617 transitions. Word has length 32 [2021-07-09 17:51:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:21,901 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 5617 transitions. [2021-07-09 17:51:21,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 5617 transitions. [2021-07-09 17:51:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:21,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:21,903 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:22,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-07-09 17:51:22,113 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash -383904958, now seen corresponding path program 177 times [2021-07-09 17:51:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:22,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728348595] [2021-07-09 17:51:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:22,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:22,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728348595] [2021-07-09 17:51:22,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728348595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:22,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839363107] [2021-07-09 17:51:22,312 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 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 [2021-07-09 17:51:22,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:51:22,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:22,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:22,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839363107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:22,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:22,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:22,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870067676] [2021-07-09 17:51:22,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:22,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:22,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:22,693 INFO L87 Difference]: Start difference. First operand 2256 states and 5617 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:23,291 INFO L93 Difference]: Finished difference Result 2398 states and 5952 transitions. [2021-07-09 17:51:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:23,295 INFO L225 Difference]: With dead ends: 2398 [2021-07-09 17:51:23,295 INFO L226 Difference]: Without dead ends: 2368 [2021-07-09 17:51:23,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 877.1ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-07-09 17:51:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2272. [2021-07-09 17:51:23,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.4909731395860852) internal successors, (5657), 2271 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 5657 transitions. [2021-07-09 17:51:23,316 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 5657 transitions. Word has length 32 [2021-07-09 17:51:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:23,316 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 5657 transitions. [2021-07-09 17:51:23,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 5657 transitions. [2021-07-09 17:51:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:23,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:23,318 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:23,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:23,519 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:23,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1534555074, now seen corresponding path program 178 times [2021-07-09 17:51:23,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:23,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677860647] [2021-07-09 17:51:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:23,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:23,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677860647] [2021-07-09 17:51:23,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677860647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:23,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991022522] [2021-07-09 17:51:23,777 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 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 [2021-07-09 17:51:23,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:23,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:23,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:24,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991022522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:24,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:24,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:24,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248883997] [2021-07-09 17:51:24,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:24,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:24,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:24,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:24,252 INFO L87 Difference]: Start difference. First operand 2272 states and 5657 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:25,045 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-07-09 17:51:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:51:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:25,049 INFO L225 Difference]: With dead ends: 2502 [2021-07-09 17:51:25,049 INFO L226 Difference]: Without dead ends: 2472 [2021-07-09 17:51:25,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1161.7ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:51:25,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-07-09 17:51:25,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2280. [2021-07-09 17:51:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-07-09 17:51:25,072 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-07-09 17:51:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:25,072 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-07-09 17:51:25,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-07-09 17:51:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:25,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:25,074 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:25,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-07-09 17:51:25,275 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash -196214658, now seen corresponding path program 179 times [2021-07-09 17:51:25,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:25,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930598168] [2021-07-09 17:51:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:25,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:25,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930598168] [2021-07-09 17:51:25,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930598168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:25,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692091464] [2021-07-09 17:51:25,535 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 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 [2021-07-09 17:51:25,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:51:25,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:25,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:51:25,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:25,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692091464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:25,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:25,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:25,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433054463] [2021-07-09 17:51:25,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:25,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:25,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:25,947 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:26,510 INFO L93 Difference]: Finished difference Result 2438 states and 6056 transitions. [2021-07-09 17:51:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:51:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:26,513 INFO L225 Difference]: With dead ends: 2438 [2021-07-09 17:51:26,513 INFO L226 Difference]: Without dead ends: 2416 [2021-07-09 17:51:26,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:51:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-07-09 17:51:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2280. [2021-07-09 17:51:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-07-09 17:51:26,538 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-07-09 17:51:26,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:26,540 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-07-09 17:51:26,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-07-09 17:51:26,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:26,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:26,543 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:26,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:26,744 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash 872989310, now seen corresponding path program 180 times [2021-07-09 17:51:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:26,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050083479] [2021-07-09 17:51:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:26,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050083479] [2021-07-09 17:51:26,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050083479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:26,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112481391] [2021-07-09 17:51:26,889 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 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 [2021-07-09 17:51:26,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:51:26,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:26,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:27,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112481391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:27,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:27,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271703295] [2021-07-09 17:51:27,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:27,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:27,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:27,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:27,339 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:27,957 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-07-09 17:51:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:27,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:27,960 INFO L225 Difference]: With dead ends: 2534 [2021-07-09 17:51:27,972 INFO L226 Difference]: Without dead ends: 2496 [2021-07-09 17:51:27,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 907.8ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-07-09 17:51:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2304. [2021-07-09 17:51:27,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 2.491098567086409) internal successors, (5737), 2303 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 5737 transitions. [2021-07-09 17:51:27,994 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 5737 transitions. Word has length 32 [2021-07-09 17:51:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:27,994 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 5737 transitions. [2021-07-09 17:51:27,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 5737 transitions. [2021-07-09 17:51:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:27,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:27,996 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:28,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:28,197 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1060679610, now seen corresponding path program 181 times [2021-07-09 17:51:28,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:28,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262603055] [2021-07-09 17:51:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:28,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:28,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262603055] [2021-07-09 17:51:28,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262603055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:28,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810007482] [2021-07-09 17:51:28,339 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 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 [2021-07-09 17:51:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:28,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810007482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:28,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:28,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:28,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842826764] [2021-07-09 17:51:28,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:28,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:28,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:28,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:28,859 INFO L87 Difference]: Start difference. First operand 2304 states and 5737 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:29,568 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-07-09 17:51:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:51:29,568 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:29,571 INFO L225 Difference]: With dead ends: 2598 [2021-07-09 17:51:29,571 INFO L226 Difference]: Without dead ends: 2560 [2021-07-09 17:51:29,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1037.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:51:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-07-09 17:51:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2296. [2021-07-09 17:51:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.491067538126362) internal successors, (5717), 2295 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5717 transitions. [2021-07-09 17:51:29,596 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5717 transitions. Word has length 32 [2021-07-09 17:51:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:29,596 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 5717 transitions. [2021-07-09 17:51:29,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5717 transitions. [2021-07-09 17:51:29,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:29,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:29,599 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:29,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2710 [2021-07-09 17:51:29,801 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:29,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:29,801 INFO L82 PathProgramCache]: Analyzing trace with hash 534651774, now seen corresponding path program 182 times [2021-07-09 17:51:29,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:29,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72362075] [2021-07-09 17:51:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:30,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72362075] [2021-07-09 17:51:30,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72362075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453030920] [2021-07-09 17:51:30,014 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 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 [2021-07-09 17:51:30,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:30,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:51:30,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:30,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453030920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:30,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:30,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:30,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994533571] [2021-07-09 17:51:30,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:30,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:30,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:30,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:30,348 INFO L87 Difference]: Start difference. First operand 2296 states and 5717 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:30,789 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-07-09 17:51:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:30,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:30,793 INFO L225 Difference]: With dead ends: 2446 [2021-07-09 17:51:30,793 INFO L226 Difference]: Without dead ends: 2408 [2021-07-09 17:51:30,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 690.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-07-09 17:51:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2312. [2021-07-09 17:51:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.491129381220251) internal successors, (5757), 2311 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) [2021-07-09 17:51:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 5757 transitions. [2021-07-09 17:51:30,814 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 5757 transitions. Word has length 32 [2021-07-09 17:51:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:30,814 INFO L482 AbstractCegarLoop]: Abstraction has 2312 states and 5757 transitions. [2021-07-09 17:51:30,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 5757 transitions. [2021-07-09 17:51:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:30,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:30,817 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:31,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2739,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:31,017 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash 722342074, now seen corresponding path program 183 times [2021-07-09 17:51:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:31,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198729473] [2021-07-09 17:51:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:31,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:31,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198729473] [2021-07-09 17:51:31,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198729473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:31,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977643136] [2021-07-09 17:51:31,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:31,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:51:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:31,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977643136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:31,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:31,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:31,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279768953] [2021-07-09 17:51:31,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:31,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:31,643 INFO L87 Difference]: Start difference. First operand 2312 states and 5757 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:32,219 INFO L93 Difference]: Finished difference Result 2558 states and 6344 transitions. [2021-07-09 17:51:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:32,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:32,222 INFO L225 Difference]: With dead ends: 2558 [2021-07-09 17:51:32,222 INFO L226 Difference]: Without dead ends: 2512 [2021-07-09 17:51:32,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 854.1ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-07-09 17:51:32,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2320. [2021-07-09 17:51:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 2.491159982751186) internal successors, (5777), 2319 states have internal predecessors, (5777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 5777 transitions. [2021-07-09 17:51:32,245 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 5777 transitions. Word has length 32 [2021-07-09 17:51:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:32,245 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 5777 transitions. [2021-07-09 17:51:32,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 5777 transitions. [2021-07-09 17:51:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:32,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:32,247 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:32,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2749,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:32,448 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash -742734722, now seen corresponding path program 184 times [2021-07-09 17:51:32,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:32,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290663172] [2021-07-09 17:51:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:32,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290663172] [2021-07-09 17:51:32,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290663172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:32,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634849227] [2021-07-09 17:51:32,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:32,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:33,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634849227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:33,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:33,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:33,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905606733] [2021-07-09 17:51:33,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:33,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:33,051 INFO L87 Difference]: Start difference. First operand 2320 states and 5777 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:33,980 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-07-09 17:51:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:51:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:33,984 INFO L225 Difference]: With dead ends: 2502 [2021-07-09 17:51:33,984 INFO L226 Difference]: Without dead ends: 2472 [2021-07-09 17:51:33,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1097.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:51:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-07-09 17:51:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2328. [2021-07-09 17:51:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4911903738719383) internal successors, (5797), 2327 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) [2021-07-09 17:51:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5797 transitions. [2021-07-09 17:51:34,006 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5797 transitions. Word has length 32 [2021-07-09 17:51:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:34,006 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 5797 transitions. [2021-07-09 17:51:34,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5797 transitions. [2021-07-09 17:51:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:34,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:34,008 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:34,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2774 [2021-07-09 17:51:34,209 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1888120646, now seen corresponding path program 185 times [2021-07-09 17:51:34,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:34,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276488561] [2021-07-09 17:51:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:34,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276488561] [2021-07-09 17:51:34,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276488561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041679543] [2021-07-09 17:51:34,457 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 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 [2021-07-09 17:51:34,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:51:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:34,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041679543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:34,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:34,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:34,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140699117] [2021-07-09 17:51:34,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:34,986 INFO L87 Difference]: Start difference. First operand 2328 states and 5797 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:35,850 INFO L93 Difference]: Finished difference Result 2686 states and 6664 transitions. [2021-07-09 17:51:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:35,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:35,853 INFO L225 Difference]: With dead ends: 2686 [2021-07-09 17:51:35,853 INFO L226 Difference]: Without dead ends: 2640 [2021-07-09 17:51:35,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1278.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:51:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-07-09 17:51:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2336. [2021-07-09 17:51:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.491220556745182) internal successors, (5817), 2335 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5817 transitions. [2021-07-09 17:51:35,876 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5817 transitions. Word has length 32 [2021-07-09 17:51:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:35,876 INFO L482 AbstractCegarLoop]: Abstraction has 2336 states and 5817 transitions. [2021-07-09 17:51:35,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5817 transitions. [2021-07-09 17:51:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:35,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:35,878 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:36,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2789,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:36,079 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1880818814, now seen corresponding path program 186 times [2021-07-09 17:51:36,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:36,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857784261] [2021-07-09 17:51:36,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:36,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:36,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857784261] [2021-07-09 17:51:36,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857784261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:36,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374905942] [2021-07-09 17:51:36,303 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 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 [2021-07-09 17:51:36,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:51:36,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:36,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:36,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374905942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:36,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:36,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154835663] [2021-07-09 17:51:36,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:36,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:36,715 INFO L87 Difference]: Start difference. First operand 2336 states and 5817 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:37,237 INFO L93 Difference]: Finished difference Result 2526 states and 6268 transitions. [2021-07-09 17:51:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:51:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:37,241 INFO L225 Difference]: With dead ends: 2526 [2021-07-09 17:51:37,241 INFO L226 Difference]: Without dead ends: 2488 [2021-07-09 17:51:37,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:51:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-07-09 17:51:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2352. [2021-07-09 17:51:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4912803062526585) internal successors, (5857), 2351 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5857 transitions. [2021-07-09 17:51:37,263 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5857 transitions. Word has length 32 [2021-07-09 17:51:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:37,263 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 5857 transitions. [2021-07-09 17:51:37,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5857 transitions. [2021-07-09 17:51:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:37,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:37,265 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:37,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2807,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:37,466 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:37,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2068509114, now seen corresponding path program 187 times [2021-07-09 17:51:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:37,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694492299] [2021-07-09 17:51:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:37,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:37,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694492299] [2021-07-09 17:51:37,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694492299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:37,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114640426] [2021-07-09 17:51:37,702 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 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 [2021-07-09 17:51:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:37,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:37,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:38,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114640426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:38,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:38,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544428455] [2021-07-09 17:51:38,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:38,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:38,230 INFO L87 Difference]: Start difference. First operand 2352 states and 5857 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:38,954 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-07-09 17:51:38,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:38,958 INFO L225 Difference]: With dead ends: 2718 [2021-07-09 17:51:38,958 INFO L226 Difference]: Without dead ends: 2672 [2021-07-09 17:51:38,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1126.3ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-07-09 17:51:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-07-09 17:51:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-07-09 17:51:38,982 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-07-09 17:51:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:38,983 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-07-09 17:51:38,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-07-09 17:51:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:38,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:38,985 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:39,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2823,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:39,185 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:39,186 INFO L82 PathProgramCache]: Analyzing trace with hash 603432318, now seen corresponding path program 188 times [2021-07-09 17:51:39,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:39,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906598155] [2021-07-09 17:51:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:39,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:39,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906598155] [2021-07-09 17:51:39,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906598155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:39,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40986546] [2021-07-09 17:51:39,366 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 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 [2021-07-09 17:51:39,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:39,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40986546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:39,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:39,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:39,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771569886] [2021-07-09 17:51:39,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:39,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:39,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:39,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:39,819 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:40,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:40,509 INFO L93 Difference]: Finished difference Result 2702 states and 6712 transitions. [2021-07-09 17:51:40,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:40,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:40,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:40,512 INFO L225 Difference]: With dead ends: 2702 [2021-07-09 17:51:40,512 INFO L226 Difference]: Without dead ends: 2672 [2021-07-09 17:51:40,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1005.7ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:51:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-07-09 17:51:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-07-09 17:51:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-07-09 17:51:40,536 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-07-09 17:51:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:40,536 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-07-09 17:51:40,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-07-09 17:51:40,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:40,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:40,538 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:40,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2848 [2021-07-09 17:51:40,739 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash -951315782, now seen corresponding path program 189 times [2021-07-09 17:51:40,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:40,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270169406] [2021-07-09 17:51:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:40,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:40,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270169406] [2021-07-09 17:51:40,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270169406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:40,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027992254] [2021-07-09 17:51:40,986 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 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 [2021-07-09 17:51:41,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:51:41,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:41,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:41,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027992254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:41,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:41,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499950208] [2021-07-09 17:51:41,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:41,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:41,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:41,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:41,528 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:42,205 INFO L93 Difference]: Finished difference Result 2510 states and 6232 transitions. [2021-07-09 17:51:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:42,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:42,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:42,209 INFO L225 Difference]: With dead ends: 2510 [2021-07-09 17:51:42,209 INFO L226 Difference]: Without dead ends: 2480 [2021-07-09 17:51:42,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1153.9ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-07-09 17:51:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2392. [2021-07-09 17:51:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-07-09 17:51:42,230 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-07-09 17:51:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:42,230 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-07-09 17:51:42,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-07-09 17:51:42,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:42,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:42,233 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:42,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-07-09 17:51:42,433 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1878574718, now seen corresponding path program 190 times [2021-07-09 17:51:42,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:42,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034816720] [2021-07-09 17:51:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:42,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:42,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034816720] [2021-07-09 17:51:42,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034816720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:42,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376231224] [2021-07-09 17:51:42,672 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 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 [2021-07-09 17:51:42,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:42,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:42,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:42,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:43,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376231224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:43,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:43,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:43,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182362938] [2021-07-09 17:51:43,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:43,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:43,120 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:43,999 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-07-09 17:51:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:51:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:44,002 INFO L225 Difference]: With dead ends: 2622 [2021-07-09 17:51:44,002 INFO L226 Difference]: Without dead ends: 2592 [2021-07-09 17:51:44,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1221.9ms TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:51:44,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-07-09 17:51:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2392. [2021-07-09 17:51:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-07-09 17:51:44,025 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-07-09 17:51:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:44,025 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-07-09 17:51:44,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-07-09 17:51:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:44,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:44,028 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:44,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:44,228 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:44,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1157254214, now seen corresponding path program 191 times [2021-07-09 17:51:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:44,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377762519] [2021-07-09 17:51:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:44,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:44,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377762519] [2021-07-09 17:51:44,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377762519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:44,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635204284] [2021-07-09 17:51:44,470 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 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 [2021-07-09 17:51:44,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:51:44,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:44,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:44,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635204284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:44,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:44,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:44,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045762819] [2021-07-09 17:51:44,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:44,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:44,973 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:45,749 INFO L93 Difference]: Finished difference Result 2710 states and 6692 transitions. [2021-07-09 17:51:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:51:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:45,752 INFO L225 Difference]: With dead ends: 2710 [2021-07-09 17:51:45,753 INFO L226 Difference]: Without dead ends: 2680 [2021-07-09 17:51:45,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1174.9ms TimeCoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-07-09 17:51:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2408. [2021-07-09 17:51:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.493144993768176) internal successors, (6001), 2407 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 6001 transitions. [2021-07-09 17:51:45,776 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 6001 transitions. Word has length 32 [2021-07-09 17:51:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:45,776 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 6001 transitions. [2021-07-09 17:51:45,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 6001 transitions. [2021-07-09 17:51:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:45,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:45,778 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:45,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2907,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:45,979 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash -969563914, now seen corresponding path program 192 times [2021-07-09 17:51:45,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:45,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045780673] [2021-07-09 17:51:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:46,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:46,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045780673] [2021-07-09 17:51:46,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045780673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:46,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485459502] [2021-07-09 17:51:46,142 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 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 [2021-07-09 17:51:46,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:51:46,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:46,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:46,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:46,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485459502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:46,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:46,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:46,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139272590] [2021-07-09 17:51:46,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:46,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:46,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:46,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:46,650 INFO L87 Difference]: Start difference. First operand 2408 states and 6001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:47,271 INFO L93 Difference]: Finished difference Result 2614 states and 6496 transitions. [2021-07-09 17:51:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:51:47,271 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:47,274 INFO L225 Difference]: With dead ends: 2614 [2021-07-09 17:51:47,274 INFO L226 Difference]: Without dead ends: 2584 [2021-07-09 17:51:47,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 970.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:51:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-07-09 17:51:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2400. [2021-07-09 17:51:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4931221342225927) internal successors, (5981), 2399 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5981 transitions. [2021-07-09 17:51:47,300 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5981 transitions. Word has length 32 [2021-07-09 17:51:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:47,300 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5981 transitions. [2021-07-09 17:51:47,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5981 transitions. [2021-07-09 17:51:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:47,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:47,302 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:47,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:47,503 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash 422868282, now seen corresponding path program 193 times [2021-07-09 17:51:47,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:47,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752248800] [2021-07-09 17:51:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:47,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752248800] [2021-07-09 17:51:47,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752248800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977998331] [2021-07-09 17:51:47,723 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 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 [2021-07-09 17:51:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:47,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:48,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977998331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:48,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:48,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:48,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133371459] [2021-07-09 17:51:48,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:48,260 INFO L87 Difference]: Start difference. First operand 2400 states and 5981 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:49,098 INFO L93 Difference]: Finished difference Result 2670 states and 6632 transitions. [2021-07-09 17:51:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:51:49,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:49,102 INFO L225 Difference]: With dead ends: 2670 [2021-07-09 17:51:49,102 INFO L226 Difference]: Without dead ends: 2632 [2021-07-09 17:51:49,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1268.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:51:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-07-09 17:51:49,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2400. [2021-07-09 17:51:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-07-09 17:51:49,129 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-07-09 17:51:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:49,129 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-07-09 17:51:49,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-07-09 17:51:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:49,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:49,132 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:49,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2950 [2021-07-09 17:51:49,333 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1307901450, now seen corresponding path program 194 times [2021-07-09 17:51:49,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:49,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620485822] [2021-07-09 17:51:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:49,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:49,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620485822] [2021-07-09 17:51:49,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620485822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:49,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358898358] [2021-07-09 17:51:49,568 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 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 [2021-07-09 17:51:49,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:49,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:49,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:49,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358898358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:50,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:50,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381614903] [2021-07-09 17:51:50,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:50,093 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:50,774 INFO L93 Difference]: Finished difference Result 2566 states and 6376 transitions. [2021-07-09 17:51:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:51:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:50,778 INFO L225 Difference]: With dead ends: 2566 [2021-07-09 17:51:50,778 INFO L226 Difference]: Without dead ends: 2544 [2021-07-09 17:51:50,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1130.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:51:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-07-09 17:51:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2392. [2021-07-09 17:51:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-07-09 17:51:50,803 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-07-09 17:51:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:50,803 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-07-09 17:51:50,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-07-09 17:51:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:50,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:50,805 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:51,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2974,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:51,006 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:51,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1176193470, now seen corresponding path program 195 times [2021-07-09 17:51:51,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:51,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763428535] [2021-07-09 17:51:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:51,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:51,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763428535] [2021-07-09 17:51:51,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763428535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:51,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059402824] [2021-07-09 17:51:51,185 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 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 [2021-07-09 17:51:51,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:51:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:51,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:51,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059402824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:51,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:51,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:51,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956198228] [2021-07-09 17:51:51,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:51,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:51,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:51,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:51,564 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:52,579 INFO L93 Difference]: Finished difference Result 2526 states and 6272 transitions. [2021-07-09 17:51:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:51:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:52,583 INFO L225 Difference]: With dead ends: 2526 [2021-07-09 17:51:52,583 INFO L226 Difference]: Without dead ends: 2496 [2021-07-09 17:51:52,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1248.5ms TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:51:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-07-09 17:51:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2400. [2021-07-09 17:51:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-07-09 17:51:52,607 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-07-09 17:51:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:52,607 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-07-09 17:51:52,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-07-09 17:51:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:52,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:52,610 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:52,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-07-09 17:51:52,811 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash -988503170, now seen corresponding path program 196 times [2021-07-09 17:51:52,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:52,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624756911] [2021-07-09 17:51:52,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:53,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624756911] [2021-07-09 17:51:53,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624756911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:53,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521171320] [2021-07-09 17:51:53,073 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 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 [2021-07-09 17:51:53,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:51:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:53,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:53,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:53,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521171320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:53,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:53,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:53,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811553484] [2021-07-09 17:51:53,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:53,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:53,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:53,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:53,576 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:54,391 INFO L93 Difference]: Finished difference Result 2534 states and 6292 transitions. [2021-07-09 17:51:54,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:51:54,391 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:54,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:54,394 INFO L225 Difference]: With dead ends: 2534 [2021-07-09 17:51:54,394 INFO L226 Difference]: Without dead ends: 2504 [2021-07-09 17:51:54,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1224.5ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:51:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-07-09 17:51:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2392. [2021-07-09 17:51:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-07-09 17:51:54,418 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-07-09 17:51:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:54,418 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-07-09 17:51:54,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-07-09 17:51:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:54,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:54,420 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:54,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:54,621 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1534490562, now seen corresponding path program 197 times [2021-07-09 17:51:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:54,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474582386] [2021-07-09 17:51:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:54,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:54,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474582386] [2021-07-09 17:51:54,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474582386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:54,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967122901] [2021-07-09 17:51:54,899 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 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 [2021-07-09 17:51:54,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:51:54,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967122901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:55,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:55,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:55,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987132811] [2021-07-09 17:51:55,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:55,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:55,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:55,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:55,313 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:56,160 INFO L93 Difference]: Finished difference Result 2646 states and 6572 transitions. [2021-07-09 17:51:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:51:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:56,164 INFO L225 Difference]: With dead ends: 2646 [2021-07-09 17:51:56,164 INFO L226 Difference]: Without dead ends: 2616 [2021-07-09 17:51:56,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1098.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:51:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-07-09 17:51:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2408. [2021-07-09 17:51:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4914831740756127) internal successors, (5997), 2407 states have internal predecessors, (5997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5997 transitions. [2021-07-09 17:51:56,189 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5997 transitions. Word has length 32 [2021-07-09 17:51:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:56,189 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 5997 transitions. [2021-07-09 17:51:56,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5997 transitions. [2021-07-09 17:51:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:56,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:56,191 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:56,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:56,392 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1532779138, now seen corresponding path program 198 times [2021-07-09 17:51:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:56,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769482753] [2021-07-09 17:51:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:56,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:56,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769482753] [2021-07-09 17:51:56,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769482753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:56,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107161338] [2021-07-09 17:51:56,603 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 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 [2021-07-09 17:51:56,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:51:56,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:57,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107161338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:57,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:57,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:57,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312047642] [2021-07-09 17:51:57,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:57,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:57,024 INFO L87 Difference]: Start difference. First operand 2408 states and 5997 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:57,477 INFO L93 Difference]: Finished difference Result 2590 states and 6428 transitions. [2021-07-09 17:51:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:51:57,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:57,480 INFO L225 Difference]: With dead ends: 2590 [2021-07-09 17:51:57,481 INFO L226 Difference]: Without dead ends: 2552 [2021-07-09 17:51:57,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:51:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-07-09 17:51:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2416. [2021-07-09 17:51:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-07-09 17:51:57,506 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-07-09 17:51:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:57,506 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-07-09 17:51:57,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:57,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-07-09 17:51:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:57,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:57,508 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:57,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-07-09 17:51:57,709 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1345088838, now seen corresponding path program 199 times [2021-07-09 17:51:57,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:57,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100660930] [2021-07-09 17:51:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:57,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:57,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100660930] [2021-07-09 17:51:57,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100660930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:57,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906908536] [2021-07-09 17:51:57,955 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 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 [2021-07-09 17:51:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:51:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906908536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:58,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:51:58,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:51:58,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617286591] [2021-07-09 17:51:58,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:51:58,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:51:58,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:51:58,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:51:58,456 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:51:59,219 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-07-09 17:51:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:51:59,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:51:59,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:51:59,222 INFO L225 Difference]: With dead ends: 2774 [2021-07-09 17:51:59,222 INFO L226 Difference]: Without dead ends: 2736 [2021-07-09 17:51:59,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1165.9ms TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:51:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-07-09 17:51:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2416. [2021-07-09 17:51:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-07-09 17:51:59,245 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-07-09 17:51:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:51:59,245 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-07-09 17:51:59,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:51:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-07-09 17:51:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:51:59,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:51:59,247 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:51:59,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:51:59,447 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:51:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:51:59,448 INFO L82 PathProgramCache]: Analyzing trace with hash -69946438, now seen corresponding path program 200 times [2021-07-09 17:51:59,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:51:59,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909411269] [2021-07-09 17:51:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:51:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:51:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:51:59,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:51:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909411269] [2021-07-09 17:51:59,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909411269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:51:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437072787] [2021-07-09 17:51:59,644 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 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 [2021-07-09 17:51:59,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:51:59,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:51:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:51:59,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:00,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437072787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:00,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:00,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:00,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525645360] [2021-07-09 17:52:00,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:00,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:00,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:00,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:00,184 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:00,747 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-07-09 17:52:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:01,130 INFO L93 Difference]: Finished difference Result 2622 states and 6516 transitions. [2021-07-09 17:52:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:52:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:01,133 INFO L225 Difference]: With dead ends: 2622 [2021-07-09 17:52:01,133 INFO L226 Difference]: Without dead ends: 2600 [2021-07-09 17:52:01,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1295.6ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:52:01,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-07-09 17:52:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2440. [2021-07-09 17:52:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4915949159491593) internal successors, (6077), 2439 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6077 transitions. [2021-07-09 17:52:01,155 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6077 transitions. Word has length 32 [2021-07-09 17:52:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:01,155 INFO L482 AbstractCegarLoop]: Abstraction has 2440 states and 6077 transitions. [2021-07-09 17:52:01,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6077 transitions. [2021-07-09 17:52:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:01,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:01,157 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:01,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-07-09 17:52:01,358 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1535023234, now seen corresponding path program 201 times [2021-07-09 17:52:01,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:01,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393621326] [2021-07-09 17:52:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:01,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393621326] [2021-07-09 17:52:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393621326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339911822] [2021-07-09 17:52:01,617 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 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 [2021-07-09 17:52:01,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:52:01,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:01,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:01,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:02,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339911822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:02,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:02,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:02,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357782019] [2021-07-09 17:52:02,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:02,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:02,096 INFO L87 Difference]: Start difference. First operand 2440 states and 6077 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:03,031 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-07-09 17:52:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:03,035 INFO L225 Difference]: With dead ends: 2718 [2021-07-09 17:52:03,035 INFO L226 Difference]: Without dead ends: 2688 [2021-07-09 17:52:03,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1295.6ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:52:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-07-09 17:52:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2448. [2021-07-09 17:52:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-07-09 17:52:03,062 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-07-09 17:52:03,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:03,062 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-07-09 17:52:03,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-07-09 17:52:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:03,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:03,064 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:03,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-07-09 17:52:03,264 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:03,265 INFO L82 PathProgramCache]: Analyzing trace with hash -275884870, now seen corresponding path program 202 times [2021-07-09 17:52:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:03,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510099551] [2021-07-09 17:52:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:03,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:03,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510099551] [2021-07-09 17:52:03,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510099551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:03,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272325410] [2021-07-09 17:52:03,531 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 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 [2021-07-09 17:52:03,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:03,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:03,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272325410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:03,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:03,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:03,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259743220] [2021-07-09 17:52:03,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:03,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:03,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:03,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:03,989 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:04,790 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-07-09 17:52:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:04,794 INFO L225 Difference]: With dead ends: 2742 [2021-07-09 17:52:04,794 INFO L226 Difference]: Without dead ends: 2712 [2021-07-09 17:52:04,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1177.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:52:04,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-09 17:52:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2456. [2021-07-09 17:52:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-07-09 17:52:04,819 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-07-09 17:52:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:04,819 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-07-09 17:52:04,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-07-09 17:52:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:04,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:04,821 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:05,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-07-09 17:52:05,021 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash -88194570, now seen corresponding path program 203 times [2021-07-09 17:52:05,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:05,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949078276] [2021-07-09 17:52:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:05,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949078276] [2021-07-09 17:52:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949078276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860546866] [2021-07-09 17:52:05,187 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 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 [2021-07-09 17:52:05,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:52:05,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:52:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:05,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860546866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:05,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:05,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:05,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979291580] [2021-07-09 17:52:05,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:05,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:05,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:05,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:05,569 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:06,057 INFO L93 Difference]: Finished difference Result 2710 states and 6732 transitions. [2021-07-09 17:52:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:52:06,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:06,061 INFO L225 Difference]: With dead ends: 2710 [2021-07-09 17:52:06,061 INFO L226 Difference]: Without dead ends: 2680 [2021-07-09 17:52:06,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:52:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-07-09 17:52:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2424. [2021-07-09 17:52:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-07-09 17:52:06,088 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-07-09 17:52:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:06,088 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-07-09 17:52:06,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-07-09 17:52:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:06,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:06,091 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:06,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3128,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:06,291 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1304237626, now seen corresponding path program 204 times [2021-07-09 17:52:06,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:06,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975385984] [2021-07-09 17:52:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:06,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975385984] [2021-07-09 17:52:06,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975385984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:06,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614668912] [2021-07-09 17:52:06,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:52:06,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:52:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:07,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614668912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:07,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:07,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:07,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207606677] [2021-07-09 17:52:07,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:07,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:07,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:07,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:07,059 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:07,938 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-07-09 17:52:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:52:07,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:07,942 INFO L225 Difference]: With dead ends: 2798 [2021-07-09 17:52:07,942 INFO L226 Difference]: Without dead ends: 2760 [2021-07-09 17:52:07,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1305.2ms TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:52:07,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-07-09 17:52:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2432. [2021-07-09 17:52:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.4915672562731386) internal successors, (6057), 2431 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6057 transitions. [2021-07-09 17:52:07,967 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6057 transitions. Word has length 32 [2021-07-09 17:52:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:07,967 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 6057 transitions. [2021-07-09 17:52:07,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6057 transitions. [2021-07-09 17:52:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:07,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:07,970 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:08,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3143,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:08,170 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash -426532106, now seen corresponding path program 205 times [2021-07-09 17:52:08,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:08,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789512131] [2021-07-09 17:52:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:08,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:08,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789512131] [2021-07-09 17:52:08,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789512131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:08,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824344418] [2021-07-09 17:52:08,414 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 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 [2021-07-09 17:52:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:08,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:08,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:08,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824344418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:08,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:08,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:08,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791057645] [2021-07-09 17:52:08,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:08,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:08,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:08,936 INFO L87 Difference]: Start difference. First operand 2432 states and 6057 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:09,774 INFO L93 Difference]: Finished difference Result 2662 states and 6616 transitions. [2021-07-09 17:52:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:09,774 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:09,778 INFO L225 Difference]: With dead ends: 2662 [2021-07-09 17:52:09,778 INFO L226 Difference]: Without dead ends: 2640 [2021-07-09 17:52:09,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1238.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:52:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-07-09 17:52:09,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2424. [2021-07-09 17:52:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-07-09 17:52:09,803 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-07-09 17:52:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:09,804 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-07-09 17:52:09,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-07-09 17:52:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:09,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:09,806 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:10,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-07-09 17:52:10,007 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1644562630, now seen corresponding path program 206 times [2021-07-09 17:52:10,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:10,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623347712] [2021-07-09 17:52:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:10,435 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 17 [2021-07-09 17:52:10,700 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-07-09 17:52:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:10,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623347712] [2021-07-09 17:52:10,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623347712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:10,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616261549] [2021-07-09 17:52:10,756 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 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 [2021-07-09 17:52:10,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:10,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:10,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:11,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616261549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:11,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:11,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461036116] [2021-07-09 17:52:11,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:11,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:11,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:11,241 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:12,000 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-07-09 17:52:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:12,003 INFO L225 Difference]: With dead ends: 2742 [2021-07-09 17:52:12,003 INFO L226 Difference]: Without dead ends: 2704 [2021-07-09 17:52:12,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1080.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:52:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-07-09 17:52:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2424. [2021-07-09 17:52:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-07-09 17:52:12,029 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-07-09 17:52:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:12,029 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-07-09 17:52:12,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-07-09 17:52:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:12,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:12,031 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:12,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:12,232 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:12,232 INFO L82 PathProgramCache]: Analyzing trace with hash -369420230, now seen corresponding path program 207 times [2021-07-09 17:52:12,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:12,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928202836] [2021-07-09 17:52:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:12,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:12,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928202836] [2021-07-09 17:52:12,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928202836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255246362] [2021-07-09 17:52:12,387 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 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 [2021-07-09 17:52:12,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:52:12,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:12,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:12,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:12,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255246362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:12,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:12,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:12,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499541520] [2021-07-09 17:52:12,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:12,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:12,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:12,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:12,820 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:13,469 INFO L93 Difference]: Finished difference Result 2678 states and 6644 transitions. [2021-07-09 17:52:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:13,473 INFO L225 Difference]: With dead ends: 2678 [2021-07-09 17:52:13,473 INFO L226 Difference]: Without dead ends: 2632 [2021-07-09 17:52:13,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 941.8ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:52:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-07-09 17:52:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2456. [2021-07-09 17:52:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-07-09 17:52:13,496 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-07-09 17:52:13,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:13,496 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-07-09 17:52:13,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:13,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-07-09 17:52:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:13,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:13,498 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:13,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3198 [2021-07-09 17:52:13,699 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:13,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2100189962, now seen corresponding path program 208 times [2021-07-09 17:52:13,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:13,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883193533] [2021-07-09 17:52:13,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:13,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:13,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883193533] [2021-07-09 17:52:13,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883193533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:13,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912085072] [2021-07-09 17:52:13,862 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 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 [2021-07-09 17:52:13,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:13,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:13,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:13,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:14,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912085072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:14,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:14,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:14,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779002011] [2021-07-09 17:52:14,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:14,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:14,308 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:14,904 INFO L93 Difference]: Finished difference Result 2646 states and 6576 transitions. [2021-07-09 17:52:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:52:14,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:14,908 INFO L225 Difference]: With dead ends: 2646 [2021-07-09 17:52:14,908 INFO L226 Difference]: Without dead ends: 2624 [2021-07-09 17:52:14,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-07-09 17:52:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2448. [2021-07-09 17:52:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-07-09 17:52:14,935 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-07-09 17:52:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:14,935 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-07-09 17:52:14,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-07-09 17:52:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:14,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:14,937 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:15,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:15,138 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1988838902, now seen corresponding path program 209 times [2021-07-09 17:52:15,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:15,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040183579] [2021-07-09 17:52:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:15,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040183579] [2021-07-09 17:52:15,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040183579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430496727] [2021-07-09 17:52:15,314 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 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 [2021-07-09 17:52:15,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:52:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430496727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:15,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:15,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431777220] [2021-07-09 17:52:15,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:15,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:15,680 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:16,208 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-07-09 17:52:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:52:16,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:16,211 INFO L225 Difference]: With dead ends: 2702 [2021-07-09 17:52:16,211 INFO L226 Difference]: Without dead ends: 2664 [2021-07-09 17:52:16,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 767.1ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-07-09 17:52:16,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2456. [2021-07-09 17:52:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-07-09 17:52:16,236 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-07-09 17:52:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:16,236 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-07-09 17:52:16,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-07-09 17:52:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:16,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:16,238 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:16,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3227,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:16,439 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2118438094, now seen corresponding path program 210 times [2021-07-09 17:52:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:16,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621847932] [2021-07-09 17:52:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:16,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:16,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621847932] [2021-07-09 17:52:16,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621847932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:16,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412434400] [2021-07-09 17:52:16,681 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 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 [2021-07-09 17:52:16,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:52:16,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:16,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:17,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412434400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:17,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:17,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:17,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225892753] [2021-07-09 17:52:17,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:17,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:17,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:17,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:17,158 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:17,862 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-07-09 17:52:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:52:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:17,866 INFO L225 Difference]: With dead ends: 2718 [2021-07-09 17:52:17,866 INFO L226 Difference]: Without dead ends: 2672 [2021-07-09 17:52:17,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1075.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-07-09 17:52:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2448. [2021-07-09 17:52:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-07-09 17:52:17,897 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-07-09 17:52:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:17,897 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-07-09 17:52:17,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-07-09 17:52:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:17,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:17,899 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:18,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3246 [2021-07-09 17:52:18,100 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:18,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:18,100 INFO L82 PathProgramCache]: Analyzing trace with hash 373114870, now seen corresponding path program 211 times [2021-07-09 17:52:18,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:18,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394252740] [2021-07-09 17:52:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:18,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:18,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394252740] [2021-07-09 17:52:18,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394252740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:18,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357395035] [2021-07-09 17:52:18,246 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 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 [2021-07-09 17:52:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:18,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:18,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357395035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:18,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:18,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:18,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342637806] [2021-07-09 17:52:18,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:18,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:18,633 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:19,176 INFO L93 Difference]: Finished difference Result 2606 states and 6468 transitions. [2021-07-09 17:52:19,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:19,176 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:19,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:19,179 INFO L225 Difference]: With dead ends: 2606 [2021-07-09 17:52:19,179 INFO L226 Difference]: Without dead ends: 2568 [2021-07-09 17:52:19,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 786.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:52:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-07-09 17:52:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2448. [2021-07-09 17:52:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-07-09 17:52:19,202 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-07-09 17:52:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:19,203 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-07-09 17:52:19,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-07-09 17:52:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:19,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:19,205 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:19,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-07-09 17:52:19,405 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:19,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1629648834, now seen corresponding path program 212 times [2021-07-09 17:52:19,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:19,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245061817] [2021-07-09 17:52:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:20,021 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-07-09 17:52:20,225 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2021-07-09 17:52:20,274 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:20,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:20,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245061817] [2021-07-09 17:52:20,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245061817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:20,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518294086] [2021-07-09 17:52:20,275 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 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 [2021-07-09 17:52:20,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:20,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:20,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518294086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:20,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:20,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:20,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640729863] [2021-07-09 17:52:20,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:20,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:20,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:20,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:20,799 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:21,656 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-07-09 17:52:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:52:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:21,660 INFO L225 Difference]: With dead ends: 2598 [2021-07-09 17:52:21,660 INFO L226 Difference]: Without dead ends: 2560 [2021-07-09 17:52:21,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1256.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-07-09 17:52:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2456. [2021-07-09 17:52:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-07-09 17:52:21,684 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-07-09 17:52:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:21,684 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-07-09 17:52:21,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-07-09 17:52:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:21,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:21,687 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:21,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3280,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:21,887 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1611400702, now seen corresponding path program 213 times [2021-07-09 17:52:21,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:21,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005344058] [2021-07-09 17:52:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:22,906 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 16 [2021-07-09 17:52:23,418 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 10 [2021-07-09 17:52:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:23,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:23,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005344058] [2021-07-09 17:52:23,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005344058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401378328] [2021-07-09 17:52:23,475 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 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 [2021-07-09 17:52:23,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:52:23,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:23,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:24,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401378328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:24,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:24,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356369058] [2021-07-09 17:52:24,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:24,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:24,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:24,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:24,007 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:24,682 INFO L93 Difference]: Finished difference Result 2694 states and 6688 transitions. [2021-07-09 17:52:24,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:24,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:24,686 INFO L225 Difference]: With dead ends: 2694 [2021-07-09 17:52:24,686 INFO L226 Difference]: Without dead ends: 2656 [2021-07-09 17:52:24,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1047.5ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:52:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-09 17:52:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2480. [2021-07-09 17:52:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.491730536506656) internal successors, (6177), 2479 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6177 transitions. [2021-07-09 17:52:24,715 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6177 transitions. Word has length 32 [2021-07-09 17:52:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:24,715 INFO L482 AbstractCegarLoop]: Abstraction has 2480 states and 6177 transitions. [2021-07-09 17:52:24,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6177 transitions. [2021-07-09 17:52:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:24,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:24,718 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:24,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:24,918 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:24,919 INFO L82 PathProgramCache]: Analyzing trace with hash -645396866, now seen corresponding path program 214 times [2021-07-09 17:52:24,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:24,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626046186] [2021-07-09 17:52:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:25,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626046186] [2021-07-09 17:52:25,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626046186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:25,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472000557] [2021-07-09 17:52:25,169 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 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 [2021-07-09 17:52:25,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:25,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:25,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472000557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:25,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:25,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:25,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238399668] [2021-07-09 17:52:25,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:25,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:25,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:25,617 INFO L87 Difference]: Start difference. First operand 2480 states and 6177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:26,162 INFO L93 Difference]: Finished difference Result 2622 states and 6508 transitions. [2021-07-09 17:52:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:52:26,162 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:26,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:26,165 INFO L225 Difference]: With dead ends: 2622 [2021-07-09 17:52:26,165 INFO L226 Difference]: Without dead ends: 2584 [2021-07-09 17:52:26,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 851.9ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:52:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-07-09 17:52:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2488. [2021-07-09 17:52:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-07-09 17:52:26,188 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-07-09 17:52:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:26,188 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-07-09 17:52:26,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-07-09 17:52:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:26,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:26,191 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:26,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:26,391 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash -457706566, now seen corresponding path program 215 times [2021-07-09 17:52:26,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:26,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745536939] [2021-07-09 17:52:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:26,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745536939] [2021-07-09 17:52:26,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745536939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515762441] [2021-07-09 17:52:26,602 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 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 [2021-07-09 17:52:26,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:52:26,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:27,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515762441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:27,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:27,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:27,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951455635] [2021-07-09 17:52:27,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:27,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:27,108 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:27,826 INFO L93 Difference]: Finished difference Result 2758 states and 6852 transitions. [2021-07-09 17:52:27,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:27,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:27,830 INFO L225 Difference]: With dead ends: 2758 [2021-07-09 17:52:27,830 INFO L226 Difference]: Without dead ends: 2728 [2021-07-09 17:52:27,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1118.6ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:52:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-07-09 17:52:27,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2488. [2021-07-09 17:52:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-07-09 17:52:27,854 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-07-09 17:52:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:27,855 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-07-09 17:52:27,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-07-09 17:52:27,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:27,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:27,873 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:28,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:28,074 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:28,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1254815034, now seen corresponding path program 216 times [2021-07-09 17:52:28,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:28,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883346352] [2021-07-09 17:52:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:28,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:28,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883346352] [2021-07-09 17:52:28,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883346352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:28,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604736333] [2021-07-09 17:52:28,220 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 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 [2021-07-09 17:52:28,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:52:28,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:28,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:28,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604736333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:28,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:28,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:28,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541850700] [2021-07-09 17:52:28,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:28,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:28,744 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:29,505 INFO L93 Difference]: Finished difference Result 2710 states and 6728 transitions. [2021-07-09 17:52:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:52:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:29,509 INFO L225 Difference]: With dead ends: 2710 [2021-07-09 17:52:29,509 INFO L226 Difference]: Without dead ends: 2672 [2021-07-09 17:52:29,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1120.2ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:52:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-07-09 17:52:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2504. [2021-07-09 17:52:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 2.4918098282061525) internal successors, (6237), 2503 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 6237 transitions. [2021-07-09 17:52:29,537 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 6237 transitions. Word has length 32 [2021-07-09 17:52:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:29,537 INFO L482 AbstractCegarLoop]: Abstraction has 2504 states and 6237 transitions. [2021-07-09 17:52:29,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 6237 transitions. [2021-07-09 17:52:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:29,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:29,539 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:29,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-07-09 17:52:29,740 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:29,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1746761730, now seen corresponding path program 217 times [2021-07-09 17:52:29,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:29,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617715194] [2021-07-09 17:52:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:29,943 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2021-07-09 17:52:30,538 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-07-09 17:52:36,938 WARN L205 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2021-07-09 17:52:39,071 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 70 DAG size of output: 17 [2021-07-09 17:52:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:39,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617715194] [2021-07-09 17:52:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617715194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171172250] [2021-07-09 17:52:39,177 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 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 [2021-07-09 17:52:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:39,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171172250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:39,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:39,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416069546] [2021-07-09 17:52:39,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:39,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:39,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:39,685 INFO L87 Difference]: Start difference. First operand 2504 states and 6237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:40,325 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-07-09 17:52:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:40,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:40,329 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 17:52:40,329 INFO L226 Difference]: Without dead ends: 2704 [2021-07-09 17:52:40,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1004.1ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:52:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-07-09 17:52:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2520. [2021-07-09 17:52:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-07-09 17:52:40,355 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-07-09 17:52:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:40,355 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-07-09 17:52:40,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-07-09 17:52:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:40,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:40,358 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:40,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-07-09 17:52:40,558 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 817435834, now seen corresponding path program 218 times [2021-07-09 17:52:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:40,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018055729] [2021-07-09 17:52:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:40,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:40,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018055729] [2021-07-09 17:52:40,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018055729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:40,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450140578] [2021-07-09 17:52:40,940 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 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 [2021-07-09 17:52:40,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:40,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:40,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:41,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450140578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:41,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:41,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:41,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476932927] [2021-07-09 17:52:41,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:41,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:41,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:41,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:41,479 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:42,306 INFO L93 Difference]: Finished difference Result 2750 states and 6832 transitions. [2021-07-09 17:52:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:52:42,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:42,309 INFO L225 Difference]: With dead ends: 2750 [2021-07-09 17:52:42,310 INFO L226 Difference]: Without dead ends: 2720 [2021-07-09 17:52:42,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1250.8ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:52:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-07-09 17:52:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2520. [2021-07-09 17:52:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-07-09 17:52:42,335 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-07-09 17:52:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:42,335 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-07-09 17:52:42,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-07-09 17:52:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:42,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:42,337 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:42,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:42,538 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:42,538 INFO L82 PathProgramCache]: Analyzing trace with hash -647640962, now seen corresponding path program 219 times [2021-07-09 17:52:42,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:42,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013915879] [2021-07-09 17:52:42,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:42,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013915879] [2021-07-09 17:52:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013915879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:42,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672523979] [2021-07-09 17:52:42,684 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 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 [2021-07-09 17:52:42,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:52:42,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:52:42,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:43,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672523979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:43,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:43,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:43,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398210728] [2021-07-09 17:52:43,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:43,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:43,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:43,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:43,099 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:43,739 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-07-09 17:52:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:52:43,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:43,742 INFO L225 Difference]: With dead ends: 2734 [2021-07-09 17:52:43,743 INFO L226 Difference]: Without dead ends: 2704 [2021-07-09 17:52:43,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 921.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:52:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-07-09 17:52:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2528. [2021-07-09 17:52:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.4918876137712704) internal successors, (6297), 2527 states have internal predecessors, (6297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6297 transitions. [2021-07-09 17:52:43,768 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6297 transitions. Word has length 32 [2021-07-09 17:52:43,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:43,768 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6297 transitions. [2021-07-09 17:52:43,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6297 transitions. [2021-07-09 17:52:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:43,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:43,771 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:43,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:43,971 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash 611497402, now seen corresponding path program 220 times [2021-07-09 17:52:43,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:43,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984380594] [2021-07-09 17:52:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:44,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984380594] [2021-07-09 17:52:44,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984380594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:44,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752074327] [2021-07-09 17:52:44,251 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 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 [2021-07-09 17:52:44,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:44,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752074327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:44,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:44,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:44,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430434232] [2021-07-09 17:52:44,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:44,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:44,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:44,723 INFO L87 Difference]: Start difference. First operand 2528 states and 6297 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:45,440 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-07-09 17:52:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:52:45,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:45,444 INFO L225 Difference]: With dead ends: 2814 [2021-07-09 17:52:45,444 INFO L226 Difference]: Without dead ends: 2784 [2021-07-09 17:52:45,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1053.4ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:52:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-07-09 17:52:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2544. [2021-07-09 17:52:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 2.491938655131734) internal successors, (6337), 2543 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 6337 transitions. [2021-07-09 17:52:45,470 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 6337 transitions. Word has length 32 [2021-07-09 17:52:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:45,470 INFO L482 AbstractCegarLoop]: Abstraction has 2544 states and 6337 transitions. [2021-07-09 17:52:45,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 6337 transitions. [2021-07-09 17:52:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:45,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:45,473 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:45,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-07-09 17:52:45,673 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash 799187702, now seen corresponding path program 221 times [2021-07-09 17:52:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:45,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898087214] [2021-07-09 17:52:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:45,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:45,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898087214] [2021-07-09 17:52:45,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898087214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:45,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257739975] [2021-07-09 17:52:45,854 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 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 [2021-07-09 17:52:45,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:52:45,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:45,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:45,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:46,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257739975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:46,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:46,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:46,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955585280] [2021-07-09 17:52:46,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:46,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:46,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:46,381 INFO L87 Difference]: Start difference. First operand 2544 states and 6337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:47,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:47,163 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-07-09 17:52:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:47,167 INFO L225 Difference]: With dead ends: 2718 [2021-07-09 17:52:47,167 INFO L226 Difference]: Without dead ends: 2688 [2021-07-09 17:52:47,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1120.0ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:52:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-07-09 17:52:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2552. [2021-07-09 17:52:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-07-09 17:52:47,192 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-07-09 17:52:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:47,192 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-07-09 17:52:47,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-07-09 17:52:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:47,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:47,194 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:47,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:47,395 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2103347398, now seen corresponding path program 222 times [2021-07-09 17:52:47,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:47,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191592492] [2021-07-09 17:52:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:47,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:47,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191592492] [2021-07-09 17:52:47,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191592492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:47,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653933487] [2021-07-09 17:52:47,584 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 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 [2021-07-09 17:52:47,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:52:47,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:47,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:48,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653933487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:48,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:48,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:48,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057475180] [2021-07-09 17:52:48,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:48,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:48,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:48,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:48,145 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:49,040 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-07-09 17:52:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:52:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:49,044 INFO L225 Difference]: With dead ends: 2814 [2021-07-09 17:52:49,045 INFO L226 Difference]: Without dead ends: 2784 [2021-07-09 17:52:49,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1319.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-07-09 17:52:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2568. [2021-07-09 17:52:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-07-09 17:52:49,071 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-07-09 17:52:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:49,071 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-07-09 17:52:49,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-07-09 17:52:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:49,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:49,074 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:49,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3457 [2021-07-09 17:52:49,274 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:49,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:49,274 INFO L82 PathProgramCache]: Analyzing trace with hash 460850166, now seen corresponding path program 223 times [2021-07-09 17:52:49,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:49,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241352855] [2021-07-09 17:52:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:49,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241352855] [2021-07-09 17:52:49,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241352855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:49,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339115206] [2021-07-09 17:52:49,436 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 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 [2021-07-09 17:52:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:49,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339115206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:49,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:49,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:49,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146725674] [2021-07-09 17:52:49,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:49,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:49,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:49,971 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:50,686 INFO L93 Difference]: Finished difference Result 2798 states and 6956 transitions. [2021-07-09 17:52:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:52:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:50,690 INFO L225 Difference]: With dead ends: 2798 [2021-07-09 17:52:50,690 INFO L226 Difference]: Without dead ends: 2776 [2021-07-09 17:52:50,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1112.1ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:52:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-07-09 17:52:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2552. [2021-07-09 17:52:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-07-09 17:52:50,716 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-07-09 17:52:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:50,716 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-07-09 17:52:50,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-07-09 17:52:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:50,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:50,718 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:50,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:50,918 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 698526078, now seen corresponding path program 224 times [2021-07-09 17:52:50,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:50,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928909930] [2021-07-09 17:52:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:51,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:51,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928909930] [2021-07-09 17:52:51,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928909930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:51,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532746610] [2021-07-09 17:52:51,143 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 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 [2021-07-09 17:52:51,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:52:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:51,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:51,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:51,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532746610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:51,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:51,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837919084] [2021-07-09 17:52:51,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:51,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:51,556 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:52,145 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-07-09 17:52:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:52:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:52,149 INFO L225 Difference]: With dead ends: 2798 [2021-07-09 17:52:52,149 INFO L226 Difference]: Without dead ends: 2760 [2021-07-09 17:52:52,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:52:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-07-09 17:52:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2576. [2021-07-09 17:52:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.4920388349514564) internal successors, (6417), 2575 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6417 transitions. [2021-07-09 17:52:52,175 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6417 transitions. Word has length 32 [2021-07-09 17:52:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:52,175 INFO L482 AbstractCegarLoop]: Abstraction has 2576 states and 6417 transitions. [2021-07-09 17:52:52,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6417 transitions. [2021-07-09 17:52:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:52,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:52,177 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:52,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:52,378 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2145354742, now seen corresponding path program 225 times [2021-07-09 17:52:52,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:52,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591918746] [2021-07-09 17:52:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:52,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:52,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591918746] [2021-07-09 17:52:52,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591918746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:52,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631285118] [2021-07-09 17:52:52,537 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 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 [2021-07-09 17:52:52,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:52:52,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:52,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:52,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:53,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:53,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631285118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:53,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:53,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:53,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004306115] [2021-07-09 17:52:53,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:53,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:53,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:53,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:53,006 INFO L87 Difference]: Start difference. First operand 2576 states and 6417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:53,620 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-07-09 17:52:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:52:53,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:53,624 INFO L225 Difference]: With dead ends: 2742 [2021-07-09 17:52:53,624 INFO L226 Difference]: Without dead ends: 2712 [2021-07-09 17:52:53,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:52:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-09 17:52:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2568. [2021-07-09 17:52:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-07-09 17:52:53,651 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-07-09 17:52:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:53,651 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-07-09 17:52:53,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-07-09 17:52:53,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:53,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:53,653 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:53,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:53,854 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:53,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1619326906, now seen corresponding path program 226 times [2021-07-09 17:52:53,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:53,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715641620] [2021-07-09 17:52:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:54,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:54,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715641620] [2021-07-09 17:52:54,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715641620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:54,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227570607] [2021-07-09 17:52:54,085 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 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 [2021-07-09 17:52:54,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:52:54,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:54,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227570607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:54,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:54,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881170374] [2021-07-09 17:52:54,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:54,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:54,480 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:55,382 INFO L93 Difference]: Finished difference Result 2886 states and 7172 transitions. [2021-07-09 17:52:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:52:55,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:55,386 INFO L225 Difference]: With dead ends: 2886 [2021-07-09 17:52:55,386 INFO L226 Difference]: Without dead ends: 2856 [2021-07-09 17:52:55,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1096.9ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:52:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-07-09 17:52:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2600. [2021-07-09 17:52:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-07-09 17:52:55,414 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-07-09 17:52:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:55,414 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-07-09 17:52:55,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-07-09 17:52:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:55,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:55,417 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:55,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:55,621 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash -757180358, now seen corresponding path program 227 times [2021-07-09 17:52:55,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:55,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105385745] [2021-07-09 17:52:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:55,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:55,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105385745] [2021-07-09 17:52:55,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105385745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:55,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694975656] [2021-07-09 17:52:55,822 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 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 [2021-07-09 17:52:55,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:52:55,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:55,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694975656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:56,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:56,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:56,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940922670] [2021-07-09 17:52:56,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:56,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:56,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:56,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:56,365 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:57,113 INFO L93 Difference]: Finished difference Result 2910 states and 7232 transitions. [2021-07-09 17:52:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:52:57,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:57,117 INFO L225 Difference]: With dead ends: 2910 [2021-07-09 17:52:57,117 INFO L226 Difference]: Without dead ends: 2880 [2021-07-09 17:52:57,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1139.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:52:57,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-07-09 17:52:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2616. [2021-07-09 17:52:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-07-09 17:52:57,144 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-07-09 17:52:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:57,144 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-07-09 17:52:57,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-07-09 17:52:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:57,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:57,147 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:57,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:57,347 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:57,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:57,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1807017206, now seen corresponding path program 228 times [2021-07-09 17:52:57,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:57,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325030366] [2021-07-09 17:52:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:57,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:57,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325030366] [2021-07-09 17:52:57,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325030366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:57,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153209282] [2021-07-09 17:52:57,555 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 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 [2021-07-09 17:52:57,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:52:57,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:52:57,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:57,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153209282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:58,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:58,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:58,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740035394] [2021-07-09 17:52:58,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:58,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:58,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:58,042 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:58,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:52:58,713 INFO L93 Difference]: Finished difference Result 2894 states and 7196 transitions. [2021-07-09 17:52:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:52:58,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:52:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:52:58,717 INFO L225 Difference]: With dead ends: 2894 [2021-07-09 17:52:58,717 INFO L226 Difference]: Without dead ends: 2872 [2021-07-09 17:52:58,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1040.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:52:58,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-07-09 17:52:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2600. [2021-07-09 17:52:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-07-09 17:52:58,745 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-07-09 17:52:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:52:58,746 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-07-09 17:52:58,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:52:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-07-09 17:52:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:52:58,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:52:58,748 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:52:58,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:52:58,948 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:52:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:52:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 517962042, now seen corresponding path program 229 times [2021-07-09 17:52:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:52:58,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184439941] [2021-07-09 17:52:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:52:58,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:59,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:52:59,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184439941] [2021-07-09 17:52:59,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184439941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:59,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660757499] [2021-07-09 17:52:59,137 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 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 [2021-07-09 17:52:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:52:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:52:59,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:52:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:52:59,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660757499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:52:59,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:52:59,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:52:59,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406387732] [2021-07-09 17:52:59,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:52:59,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:52:59,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:52:59,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:52:59,652 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:00,341 INFO L93 Difference]: Finished difference Result 2822 states and 7008 transitions. [2021-07-09 17:53:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:00,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:00,346 INFO L225 Difference]: With dead ends: 2822 [2021-07-09 17:53:00,346 INFO L226 Difference]: Without dead ends: 2784 [2021-07-09 17:53:00,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1070.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:53:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-07-09 17:53:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2600. [2021-07-09 17:53:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-07-09 17:53:00,383 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-07-09 17:53:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:00,383 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-07-09 17:53:00,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-07-09 17:53:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:00,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:00,385 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:00,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:00,586 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1231055822, now seen corresponding path program 230 times [2021-07-09 17:53:00,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:00,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574561553] [2021-07-09 17:53:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:00,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:00,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574561553] [2021-07-09 17:53:00,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574561553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:00,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992771339] [2021-07-09 17:53:00,772 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 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 [2021-07-09 17:53:00,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:00,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:00,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:00,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:01,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992771339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:01,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:01,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:01,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423347326] [2021-07-09 17:53:01,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:01,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:01,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:01,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:01,225 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:01,931 INFO L93 Difference]: Finished difference Result 2926 states and 7264 transitions. [2021-07-09 17:53:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:01,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:01,935 INFO L225 Difference]: With dead ends: 2926 [2021-07-09 17:53:01,935 INFO L226 Difference]: Without dead ends: 2880 [2021-07-09 17:53:01,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1038.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:53:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-07-09 17:53:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2600. [2021-07-09 17:53:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-07-09 17:53:01,961 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-07-09 17:53:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:01,962 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-07-09 17:53:01,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-07-09 17:53:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:01,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:01,964 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:02,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:02,165 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:02,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:02,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1260497142, now seen corresponding path program 231 times [2021-07-09 17:53:02,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:02,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59888805] [2021-07-09 17:53:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:02,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:02,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59888805] [2021-07-09 17:53:02,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59888805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:02,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765939816] [2021-07-09 17:53:02,352 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 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 [2021-07-09 17:53:02,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:53:02,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:02,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765939816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:02,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:02,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:02,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323326796] [2021-07-09 17:53:02,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:02,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:02,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:02,754 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:03,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:03,316 INFO L93 Difference]: Finished difference Result 2782 states and 6908 transitions. [2021-07-09 17:53:03,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:03,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:03,320 INFO L225 Difference]: With dead ends: 2782 [2021-07-09 17:53:03,320 INFO L226 Difference]: Without dead ends: 2744 [2021-07-09 17:53:03,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-07-09 17:53:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2600. [2021-07-09 17:53:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-07-09 17:53:03,351 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-07-09 17:53:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:03,352 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-07-09 17:53:03,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-07-09 17:53:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:03,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:03,355 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:03,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:03,556 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1455933510, now seen corresponding path program 232 times [2021-07-09 17:53:03,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:03,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740653690] [2021-07-09 17:53:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:03,910 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 10 [2021-07-09 17:53:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:04,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740653690] [2021-07-09 17:53:04,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740653690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489849658] [2021-07-09 17:53:04,046 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 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 [2021-07-09 17:53:04,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:04,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:04,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489849658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:04,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:04,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:04,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939963210] [2021-07-09 17:53:04,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:04,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:04,466 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:05,162 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-07-09 17:53:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:53:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:05,166 INFO L225 Difference]: With dead ends: 2806 [2021-07-09 17:53:05,166 INFO L226 Difference]: Without dead ends: 2776 [2021-07-09 17:53:05,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 956.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:53:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-07-09 17:53:05,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2624. [2021-07-09 17:53:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-07-09 17:53:05,193 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-07-09 17:53:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:05,193 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-07-09 17:53:05,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-07-09 17:53:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:05,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:05,196 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:05,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-07-09 17:53:05,397 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:05,397 INFO L82 PathProgramCache]: Analyzing trace with hash 462526522, now seen corresponding path program 233 times [2021-07-09 17:53:05,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:05,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353903156] [2021-07-09 17:53:05,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:05,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:05,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353903156] [2021-07-09 17:53:05,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353903156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:05,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063986522] [2021-07-09 17:53:05,597 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 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 [2021-07-09 17:53:05,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:53:05,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:05,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:06,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063986522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:06,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:06,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:06,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89362543] [2021-07-09 17:53:06,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:06,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:06,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:06,072 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:06,668 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-07-09 17:53:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:06,672 INFO L225 Difference]: With dead ends: 2798 [2021-07-09 17:53:06,672 INFO L226 Difference]: Without dead ends: 2760 [2021-07-09 17:53:06,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 907.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-07-09 17:53:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-07-09 17:53:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-07-09 17:53:06,701 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-07-09 17:53:06,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:06,701 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-07-09 17:53:06,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-07-09 17:53:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:06,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:06,704 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:06,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:06,904 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash 124188986, now seen corresponding path program 234 times [2021-07-09 17:53:06,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:06,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27822579] [2021-07-09 17:53:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:07,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27822579] [2021-07-09 17:53:07,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27822579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638985131] [2021-07-09 17:53:07,119 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 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 [2021-07-09 17:53:07,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:53:07,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:07,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:07,518 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-07-09 17:53:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:07,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638985131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:07,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:07,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:07,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405560505] [2021-07-09 17:53:07,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:07,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:07,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:07,634 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:08,404 INFO L93 Difference]: Finished difference Result 2894 states and 7192 transitions. [2021-07-09 17:53:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:53:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:08,408 INFO L225 Difference]: With dead ends: 2894 [2021-07-09 17:53:08,408 INFO L226 Difference]: Without dead ends: 2864 [2021-07-09 17:53:08,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1168.0ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:53:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-07-09 17:53:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2640. [2021-07-09 17:53:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.4922319060250095) internal successors, (6577), 2639 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6577 transitions. [2021-07-09 17:53:08,436 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6577 transitions. Word has length 32 [2021-07-09 17:53:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:08,436 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 6577 transitions. [2021-07-09 17:53:08,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6577 transitions. [2021-07-09 17:53:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:08,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:08,438 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:08,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3720 [2021-07-09 17:53:08,639 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:08,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1606580746, now seen corresponding path program 235 times [2021-07-09 17:53:08,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:08,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28629734] [2021-07-09 17:53:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:08,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:08,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28629734] [2021-07-09 17:53:08,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28629734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:08,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872679280] [2021-07-09 17:53:08,804 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 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 [2021-07-09 17:53:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:08,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:08,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:09,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872679280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:09,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:09,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:09,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439781805] [2021-07-09 17:53:09,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:09,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:09,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:09,296 INFO L87 Difference]: Start difference. First operand 2640 states and 6577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:09,960 INFO L93 Difference]: Finished difference Result 2878 states and 7156 transitions. [2021-07-09 17:53:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:53:09,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:09,964 INFO L225 Difference]: With dead ends: 2878 [2021-07-09 17:53:09,964 INFO L226 Difference]: Without dead ends: 2856 [2021-07-09 17:53:09,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1024.8ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:53:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-07-09 17:53:09,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2616. [2021-07-09 17:53:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-07-09 17:53:09,993 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-07-09 17:53:09,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:09,993 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-07-09 17:53:09,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:09,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-07-09 17:53:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:09,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:09,995 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:10,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3740,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:10,196 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:10,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2103411910, now seen corresponding path program 236 times [2021-07-09 17:53:10,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:10,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425038031] [2021-07-09 17:53:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:10,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:10,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425038031] [2021-07-09 17:53:10,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425038031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:10,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35652599] [2021-07-09 17:53:10,446 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 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 [2021-07-09 17:53:10,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:10,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:10,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35652599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:10,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:10,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:10,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716328001] [2021-07-09 17:53:10,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:10,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:10,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:10,856 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:11,503 INFO L93 Difference]: Finished difference Result 2790 states and 6932 transitions. [2021-07-09 17:53:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:53:11,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:11,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:11,507 INFO L225 Difference]: With dead ends: 2790 [2021-07-09 17:53:11,507 INFO L226 Difference]: Without dead ends: 2760 [2021-07-09 17:53:11,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:53:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-07-09 17:53:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-07-09 17:53:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-07-09 17:53:11,531 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-07-09 17:53:11,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:11,531 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-07-09 17:53:11,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:11,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-07-09 17:53:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:11,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:11,534 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:11,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3762 [2021-07-09 17:53:11,734 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:11,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:11,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1042745718, now seen corresponding path program 237 times [2021-07-09 17:53:11,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:11,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492496373] [2021-07-09 17:53:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:11,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492496373] [2021-07-09 17:53:11,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492496373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560292317] [2021-07-09 17:53:11,910 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 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 [2021-07-09 17:53:11,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:53:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:12,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560292317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:12,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:12,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:12,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197701704] [2021-07-09 17:53:12,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:12,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:12,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:12,308 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:12,832 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-07-09 17:53:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:12,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:12,836 INFO L225 Difference]: With dead ends: 2774 [2021-07-09 17:53:12,836 INFO L226 Difference]: Without dead ends: 2744 [2021-07-09 17:53:12,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 792.0ms TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-07-09 17:53:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2632. [2021-07-09 17:53:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.492208285822881) internal successors, (6557), 2631 states have internal predecessors, (6557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6557 transitions. [2021-07-09 17:53:12,862 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6557 transitions. Word has length 32 [2021-07-09 17:53:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:12,862 INFO L482 AbstractCegarLoop]: Abstraction has 2632 states and 6557 transitions. [2021-07-09 17:53:12,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6557 transitions. [2021-07-09 17:53:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:12,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:12,864 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:13,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3777,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:13,065 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash -757244870, now seen corresponding path program 238 times [2021-07-09 17:53:13,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:13,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974387827] [2021-07-09 17:53:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:13,364 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 19 [2021-07-09 17:53:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:13,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:13,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974387827] [2021-07-09 17:53:13,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974387827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:13,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893286218] [2021-07-09 17:53:13,467 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 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 [2021-07-09 17:53:13,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:53:13,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:13,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:13,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893286218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:13,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:13,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:13,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384612149] [2021-07-09 17:53:13,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:13,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:13,851 INFO L87 Difference]: Start difference. First operand 2632 states and 6557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:14,655 INFO L93 Difference]: Finished difference Result 2766 states and 6876 transitions. [2021-07-09 17:53:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:14,659 INFO L225 Difference]: With dead ends: 2766 [2021-07-09 17:53:14,659 INFO L226 Difference]: Without dead ends: 2736 [2021-07-09 17:53:14,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1075.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:53:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-07-09 17:53:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2616. [2021-07-09 17:53:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-07-09 17:53:14,687 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-07-09 17:53:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:14,687 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-07-09 17:53:14,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-07-09 17:53:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:14,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:14,689 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:14,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3800,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:14,890 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1906054538, now seen corresponding path program 239 times [2021-07-09 17:53:14,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:14,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502760364] [2021-07-09 17:53:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:15,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:15,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502760364] [2021-07-09 17:53:15,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502760364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:15,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912319333] [2021-07-09 17:53:15,061 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 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 [2021-07-09 17:53:15,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:53:15,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:15,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:15,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:15,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912319333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:15,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:15,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:15,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111990080] [2021-07-09 17:53:15,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:15,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:15,450 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:16,059 INFO L93 Difference]: Finished difference Result 2898 states and 7143 transitions. [2021-07-09 17:53:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:53:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:16,063 INFO L225 Difference]: With dead ends: 2898 [2021-07-09 17:53:16,063 INFO L226 Difference]: Without dead ends: 2868 [2021-07-09 17:53:16,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 826.1ms TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:53:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-07-09 17:53:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2656. [2021-07-09 17:53:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4937853107344634) internal successors, (6621), 2655 states have internal predecessors, (6621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6621 transitions. [2021-07-09 17:53:16,090 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6621 transitions. Word has length 32 [2021-07-09 17:53:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:16,091 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6621 transitions. [2021-07-09 17:53:16,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6621 transitions. [2021-07-09 17:53:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:16,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:16,093 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:16,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3820,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:16,295 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash 639894894, now seen corresponding path program 240 times [2021-07-09 17:53:16,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:16,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307760698] [2021-07-09 17:53:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:16,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:16,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307760698] [2021-07-09 17:53:16,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307760698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:16,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157346567] [2021-07-09 17:53:16,485 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 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 [2021-07-09 17:53:16,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:53:16,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:16,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:16,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:16,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157346567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:16,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:16,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885985363] [2021-07-09 17:53:16,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:16,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:16,850 INFO L87 Difference]: Start difference. First operand 2656 states and 6621 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:17,300 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-07-09 17:53:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:53:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:17,304 INFO L225 Difference]: With dead ends: 2742 [2021-07-09 17:53:17,304 INFO L226 Difference]: Without dead ends: 2712 [2021-07-09 17:53:17,304 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:53:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-09 17:53:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2648. [2021-07-09 17:53:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-07-09 17:53:17,329 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-07-09 17:53:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:17,329 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-07-09 17:53:17,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-07-09 17:53:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:17,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:17,332 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:17,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3834 [2021-07-09 17:53:17,532 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash 468208630, now seen corresponding path program 241 times [2021-07-09 17:53:17,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:17,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986792905] [2021-07-09 17:53:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:17,930 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 13 [2021-07-09 17:53:18,086 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 10 [2021-07-09 17:53:18,276 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 9 [2021-07-09 17:53:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:18,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:18,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986792905] [2021-07-09 17:53:18,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986792905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:18,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582339805] [2021-07-09 17:53:18,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:53:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:53:18,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:18,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582339805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:18,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:18,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:18,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369154759] [2021-07-09 17:53:18,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:18,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:18,695 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:19,253 INFO L93 Difference]: Finished difference Result 2814 states and 6984 transitions. [2021-07-09 17:53:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:53:19,253 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:19,257 INFO L225 Difference]: With dead ends: 2814 [2021-07-09 17:53:19,257 INFO L226 Difference]: Without dead ends: 2768 [2021-07-09 17:53:19,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:53:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-07-09 17:53:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2648. [2021-07-09 17:53:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-07-09 17:53:19,285 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-07-09 17:53:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:19,285 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-07-09 17:53:19,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-07-09 17:53:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:19,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:19,288 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:19,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3848 [2021-07-09 17:53:19,488 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1915037294, now seen corresponding path program 242 times [2021-07-09 17:53:19,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:19,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722828176] [2021-07-09 17:53:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:19,894 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 12 [2021-07-09 17:53:20,135 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 10 [2021-07-09 17:53:20,384 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-07-09 17:53:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:20,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:20,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722828176] [2021-07-09 17:53:20,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722828176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:20,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088669541] [2021-07-09 17:53:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:53:20,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:53:20,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:20,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:20,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088669541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:20,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:20,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:20,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122109775] [2021-07-09 17:53:20,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:20,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:20,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:20,835 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:21,333 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-07-09 17:53:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:53:21,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:21,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:21,337 INFO L225 Difference]: With dead ends: 2806 [2021-07-09 17:53:21,337 INFO L226 Difference]: Without dead ends: 2776 [2021-07-09 17:53:21,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 760.7ms TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:53:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-07-09 17:53:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2648. [2021-07-09 17:53:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-07-09 17:53:21,364 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-07-09 17:53:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:21,364 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-07-09 17:53:21,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-07-09 17:53:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:53:21,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:21,366 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:21,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3863,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:53:21,567 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1558451626, now seen corresponding path program 243 times [2021-07-09 17:53:21,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:21,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30308892] [2021-07-09 17:53:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:21,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:53:21,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30308892] [2021-07-09 17:53:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30308892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:21,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164823276] [2021-07-09 17:53:21,902 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 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 [2021-07-09 17:53:21,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:53:21,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:53:21,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:53:21,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:53:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:53:22,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164823276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:53:22,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:53:22,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 17:53:22,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409397472] [2021-07-09 17:53:22,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:53:22,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:53:22,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:53:22,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:53:22,275 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:53:22,810 INFO L93 Difference]: Finished difference Result 2718 states and 6756 transitions. [2021-07-09 17:53:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:53:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:53:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:53:22,814 INFO L225 Difference]: With dead ends: 2718 [2021-07-09 17:53:22,814 INFO L226 Difference]: Without dead ends: 2696 [2021-07-09 17:53:22,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 870.8ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:53:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-07-09 17:53:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2656. [2021-07-09 17:53:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4922787193973637) internal successors, (6617), 2655 states have internal predecessors, (6617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6617 transitions. [2021-07-09 17:53:22,839 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6617 transitions. Word has length 32 [2021-07-09 17:53:22,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:53:22,839 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6617 transitions. [2021-07-09 17:53:22,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:53:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6617 transitions. [2021-07-09 17:53:22,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 17:53:22,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:53:22,841 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:53:23,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3877 [2021-07-09 17:53:23,042 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:53:23,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:53:23,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1344530956, now seen corresponding path program 6 times [2021-07-09 17:53:23,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:53:23,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468246591] [2021-07-09 17:53:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:53:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:53:24,208 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 88 DAG size of output: 15 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown