/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/popl20/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:31:36,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:31:36,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:31:36,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:31:36,957 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 [2021-08-12 19:31:36,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:31:36,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:31:36,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:31:36,996 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:31:36,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:31:36,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:31:36,999 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:31:36,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:31:36,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:31:37,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:31:37,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:31:37,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:31:37,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:31:37,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:31:37,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:31:37,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:31:37,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:31:37,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:31:37,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:31:37,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:31:37,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:31:37,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:31:37,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:31:37,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:31:37,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:31:37,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:31:37,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:31:37,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:31:37,003 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:31:37,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:31:37,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:31:37,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:31:37,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:31:37,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:31:37,345 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:31:37,347 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:31:37,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-08-12 19:31:37,348 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-08-12 19:31:37,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:31:37,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:31:37,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:31:37,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:31:37,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:31:37,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:31:37,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:31:37,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:31:37,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:31:37,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/1) ... [2021-08-12 19:31:37,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:31:37,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:31:37,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:31:37,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:31:37,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (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 [2021-08-12 19:31:37,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:31:37,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:31:37,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:31:37,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:31:37,473 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:31:37,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:31:37,473 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:31:37,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:31:37,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:31:37,474 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:31:37,611 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:31:37,611 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:31:37,613 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:31:37 BoogieIcfgContainer [2021-08-12 19:31:37,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:31:37,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:31:37,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:31:37,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:31:37,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:31:37" (1/2) ... [2021-08-12 19:31:37,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75df8506 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:31:37, skipping insertion in model container [2021-08-12 19:31:37,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:31:37" (2/2) ... [2021-08-12 19:31:37,619 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-08-12 19:31:37,624 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:31:37,624 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:31:37,625 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:31:37,651 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:31:37,671 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:31:37,689 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:31:37,689 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:31:37,689 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:31:37,689 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:31:37,689 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:31:37,690 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:31:37,690 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:31:37,690 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:31:37,698 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-08-12 19:31:37,709 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:31:37,717 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:37,718 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:37,718 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-08-12 19:31:37,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:37,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233954341] [2021-08-12 19:31:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:37,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:37,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233954341] [2021-08-12 19:31:37,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233954341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:31:37,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:31:37,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:31:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090377443] [2021-08-12 19:31:38,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:31:38,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:31:38,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:31:38,023 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:38,106 INFO L93 Difference]: Finished difference Result 58 states and 103 transitions. [2021-08-12 19:31:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:31:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:31:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:38,121 INFO L225 Difference]: With dead ends: 58 [2021-08-12 19:31:38,122 INFO L226 Difference]: Without dead ends: 43 [2021-08-12 19:31:38,125 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:31:38,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-12 19:31:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-08-12 19:31:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-08-12 19:31:38,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-08-12 19:31:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:38,172 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-08-12 19:31:38,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-08-12 19:31:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-12 19:31:38,174 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:38,174 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:38,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:31:38,174 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-08-12 19:31:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:38,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564405360] [2021-08-12 19:31:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:31:38,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:38,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564405360] [2021-08-12 19:31:38,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564405360] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:31:38,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:31:38,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:31:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960038012] [2021-08-12 19:31:38,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:31:38,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:38,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:31:38,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:31:38,288 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:38,350 INFO L93 Difference]: Finished difference Result 70 states and 128 transitions. [2021-08-12 19:31:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:31:38,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-12 19:31:38,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:38,354 INFO L225 Difference]: With dead ends: 70 [2021-08-12 19:31:38,354 INFO L226 Difference]: Without dead ends: 50 [2021-08-12 19:31:38,355 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:31:38,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-12 19:31:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-12 19:31:38,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-08-12 19:31:38,371 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-08-12 19:31:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:38,371 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-08-12 19:31:38,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-08-12 19:31:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:31:38,372 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:38,373 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:38,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:31:38,373 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-08-12 19:31:38,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:38,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358486900] [2021-08-12 19:31:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:38,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:38,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358486900] [2021-08-12 19:31:38,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358486900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:38,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720151620] [2021-08-12 19:31:38,504 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 [2021-08-12 19:31:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:31:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:38,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720151620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:38,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:38,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-12 19:31:38,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796411222] [2021-08-12 19:31:38,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:31:38,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:31:38,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:31:38,749 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:38,833 INFO L93 Difference]: Finished difference Result 101 states and 187 transitions. [2021-08-12 19:31:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:31:38,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:31:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:38,835 INFO L225 Difference]: With dead ends: 101 [2021-08-12 19:31:38,835 INFO L226 Difference]: Without dead ends: 78 [2021-08-12 19:31:38,835 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:31:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-12 19:31:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-08-12 19:31:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-08-12 19:31:38,848 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-08-12 19:31:38,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:38,848 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-08-12 19:31:38,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-08-12 19:31:38,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:31:38,850 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:38,850 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:39,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 19:31:39,065 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-08-12 19:31:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:39,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794393828] [2021-08-12 19:31:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:39,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:39,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794393828] [2021-08-12 19:31:39,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794393828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:39,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793864878] [2021-08-12 19:31:39,143 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 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 [2021-08-12 19:31:39,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:31:39,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:31:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793864878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:39,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:39,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 19:31:39,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106669033] [2021-08-12 19:31:39,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:31:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:39,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:31:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:31:39,311 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:39,350 INFO L93 Difference]: Finished difference Result 95 states and 184 transitions. [2021-08-12 19:31:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:31:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:31:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:39,351 INFO L225 Difference]: With dead ends: 95 [2021-08-12 19:31:39,351 INFO L226 Difference]: Without dead ends: 77 [2021-08-12 19:31:39,351 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:31:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-12 19:31:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-08-12 19:31:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-08-12 19:31:39,357 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-08-12 19:31:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:39,358 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-08-12 19:31:39,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-08-12 19:31:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:31:39,358 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:39,359 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:39,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:39,581 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:39,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-08-12 19:31:39,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:39,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564064331] [2021-08-12 19:31:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:39,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:39,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564064331] [2021-08-12 19:31:39,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564064331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:39,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611226526] [2021-08-12 19:31:39,670 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 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 [2021-08-12 19:31:39,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:31:39,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:39,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:31:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:39,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611226526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:39,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:39,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-12 19:31:39,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502365353] [2021-08-12 19:31:39,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:31:39,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:31:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:31:39,932 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:40,288 INFO L93 Difference]: Finished difference Result 211 states and 423 transitions. [2021-08-12 19:31:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:31:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:31:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:40,294 INFO L225 Difference]: With dead ends: 211 [2021-08-12 19:31:40,294 INFO L226 Difference]: Without dead ends: 192 [2021-08-12 19:31:40,294 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:31:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-12 19:31:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-08-12 19:31:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-08-12 19:31:40,315 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-08-12 19:31:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:40,315 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-08-12 19:31:40,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-08-12 19:31:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-12 19:31:40,316 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:40,316 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:40,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:40,529 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-08-12 19:31:40,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:40,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912474158] [2021-08-12 19:31:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:40,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:40,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912474158] [2021-08-12 19:31:40,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912474158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:40,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196788358] [2021-08-12 19:31:40,593 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 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 [2021-08-12 19:31:40,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:31:40,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:31:40,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:40,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196788358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:40,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:40,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-08-12 19:31:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057628552] [2021-08-12 19:31:40,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:31:40,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:31:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:31:40,790 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:41,158 INFO L93 Difference]: Finished difference Result 183 states and 349 transitions. [2021-08-12 19:31:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:31:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-12 19:31:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:41,160 INFO L225 Difference]: With dead ends: 183 [2021-08-12 19:31:41,160 INFO L226 Difference]: Without dead ends: 166 [2021-08-12 19:31:41,161 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:31:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-12 19:31:41,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-08-12 19:31:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:41,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-08-12 19:31:41,179 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-08-12 19:31:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:41,180 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-08-12 19:31:41,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-08-12 19:31:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:31:41,184 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:41,184 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:41,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:41,397 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-08-12 19:31:41,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:41,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891071122] [2021-08-12 19:31:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:41,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:41,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891071122] [2021-08-12 19:31:41,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891071122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:41,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248350636] [2021-08-12 19:31:41,464 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 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 [2021-08-12 19:31:41,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:31:41,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:41,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 19:31:41,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:41,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248350636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:41,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:41,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 19:31:41,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804370539] [2021-08-12 19:31:41,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:31:41,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:31:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:31:41,572 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:41,616 INFO L93 Difference]: Finished difference Result 192 states and 378 transitions. [2021-08-12 19:31:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:31:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:31:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:41,618 INFO L225 Difference]: With dead ends: 192 [2021-08-12 19:31:41,618 INFO L226 Difference]: Without dead ends: 163 [2021-08-12 19:31:41,619 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:31:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-12 19:31:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-08-12 19:31:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-08-12 19:31:41,635 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-08-12 19:31:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:41,635 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-08-12 19:31:41,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-08-12 19:31:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:31:41,638 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:41,638 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:41,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:41,853 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-08-12 19:31:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:41,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963626969] [2021-08-12 19:31:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:41,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:41,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963626969] [2021-08-12 19:31:41,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963626969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:41,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135293836] [2021-08-12 19:31:41,981 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 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 [2021-08-12 19:31:42,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:31:42,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:42,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:31:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:42,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135293836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:42,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:42,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-12 19:31:42,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333363541] [2021-08-12 19:31:42,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:31:42,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:42,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:31:42,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:31:42,219 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:42,723 INFO L93 Difference]: Finished difference Result 335 states and 686 transitions. [2021-08-12 19:31:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:31:42,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:31:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:42,729 INFO L225 Difference]: With dead ends: 335 [2021-08-12 19:31:42,729 INFO L226 Difference]: Without dead ends: 302 [2021-08-12 19:31:42,730 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:31:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-12 19:31:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-08-12 19:31:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 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) [2021-08-12 19:31:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-08-12 19:31:42,744 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-08-12 19:31:42,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:42,744 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-08-12 19:31:42,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-08-12 19:31:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:31:42,745 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:42,745 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:42,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:42,976 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-08-12 19:31:42,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:42,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910501320] [2021-08-12 19:31:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:43,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:43,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910501320] [2021-08-12 19:31:43,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910501320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:43,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574293422] [2021-08-12 19:31:43,043 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 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 [2021-08-12 19:31:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:43,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:31:43,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:43,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574293422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:43,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:43,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-12 19:31:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439294537] [2021-08-12 19:31:43,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:31:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:31:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:31:43,239 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:43,594 INFO L93 Difference]: Finished difference Result 334 states and 677 transitions. [2021-08-12 19:31:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:31:43,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:31:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:43,597 INFO L225 Difference]: With dead ends: 334 [2021-08-12 19:31:43,597 INFO L226 Difference]: Without dead ends: 317 [2021-08-12 19:31:43,598 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:31:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-12 19:31:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-08-12 19:31:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-08-12 19:31:43,609 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-08-12 19:31:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:43,609 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-08-12 19:31:43,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-08-12 19:31:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:31:43,610 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:43,610 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:43,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:31:43,825 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-08-12 19:31:43,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:43,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818908671] [2021-08-12 19:31:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:43,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818908671] [2021-08-12 19:31:43,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818908671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630044091] [2021-08-12 19:31:43,922 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 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 [2021-08-12 19:31:43,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:31:43,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:31:43,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:44,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630044091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:44,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:44,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-12 19:31:44,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532985913] [2021-08-12 19:31:44,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:31:44,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:44,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:31:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:31:44,166 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:44,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:44,805 INFO L93 Difference]: Finished difference Result 450 states and 942 transitions. [2021-08-12 19:31:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:31:44,806 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:31:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:44,808 INFO L225 Difference]: With dead ends: 450 [2021-08-12 19:31:44,808 INFO L226 Difference]: Without dead ends: 417 [2021-08-12 19:31:44,809 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:31:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-12 19:31:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-08-12 19:31:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-08-12 19:31:44,823 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-08-12 19:31:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:44,823 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-08-12 19:31:44,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-08-12 19:31:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:31:44,824 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:44,824 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:45,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 19:31:45,049 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:45,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:45,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-08-12 19:31:45,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:45,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586660437] [2021-08-12 19:31:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:45,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:45,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586660437] [2021-08-12 19:31:45,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586660437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:45,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688938186] [2021-08-12 19:31:45,124 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 [2021-08-12 19:31:45,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:31:45,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:45,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 19:31:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:45,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688938186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:45,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:45,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-08-12 19:31:45,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915161579] [2021-08-12 19:31:45,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:31:45,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:31:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:31:45,326 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:45,866 INFO L93 Difference]: Finished difference Result 353 states and 711 transitions. [2021-08-12 19:31:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:31:45,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:31:45,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:45,874 INFO L225 Difference]: With dead ends: 353 [2021-08-12 19:31:45,874 INFO L226 Difference]: Without dead ends: 336 [2021-08-12 19:31:45,875 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 469.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:31:45,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-08-12 19:31:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-08-12 19:31:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-08-12 19:31:45,888 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-08-12 19:31:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:45,888 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-08-12 19:31:45,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-08-12 19:31:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:31:45,889 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:45,889 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:46,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:46,104 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-08-12 19:31:46,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:46,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414160874] [2021-08-12 19:31:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:46,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:46,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414160874] [2021-08-12 19:31:46,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414160874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:46,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487896236] [2021-08-12 19:31:46,173 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 [2021-08-12 19:31:46,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:31:46,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:46,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 19:31:46,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:46,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487896236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:46,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:46,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-12 19:31:46,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81931991] [2021-08-12 19:31:46,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:31:46,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:46,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:31:46,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:31:46,279 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:46,353 INFO L93 Difference]: Finished difference Result 356 states and 736 transitions. [2021-08-12 19:31:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:31:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:31:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:46,356 INFO L225 Difference]: With dead ends: 356 [2021-08-12 19:31:46,356 INFO L226 Difference]: Without dead ends: 321 [2021-08-12 19:31:46,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:31:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-12 19:31:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-08-12 19:31:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-08-12 19:31:46,373 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-08-12 19:31:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:46,373 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-08-12 19:31:46,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:46,373 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-08-12 19:31:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:31:46,374 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:46,374 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:46,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:46,589 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-08-12 19:31:46,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:46,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844644859] [2021-08-12 19:31:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:46,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844644859] [2021-08-12 19:31:46,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844644859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625262551] [2021-08-12 19:31:46,712 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 [2021-08-12 19:31:46,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:31:46,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:31:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625262551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:46,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:46,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 19:31:46,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024295115] [2021-08-12 19:31:46,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:31:46,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:31:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:31:46,988 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:47,859 INFO L93 Difference]: Finished difference Result 578 states and 1204 transitions. [2021-08-12 19:31:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:31:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:31:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:47,863 INFO L225 Difference]: With dead ends: 578 [2021-08-12 19:31:47,863 INFO L226 Difference]: Without dead ends: 553 [2021-08-12 19:31:47,864 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 722.1ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:31:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-08-12 19:31:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-08-12 19:31:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-08-12 19:31:47,885 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-08-12 19:31:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:47,885 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-08-12 19:31:47,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-08-12 19:31:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:31:47,886 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:47,886 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:48,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:31:48,100 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:48,100 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-08-12 19:31:48,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:48,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288440843] [2021-08-12 19:31:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:48,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:48,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288440843] [2021-08-12 19:31:48,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288440843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:48,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844842974] [2021-08-12 19:31:48,202 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 [2021-08-12 19:31:48,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:31:48,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:31:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:48,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844842974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:48,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:48,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 19:31:48,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610976397] [2021-08-12 19:31:48,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:31:48,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:31:48,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:31:48,473 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:49,432 INFO L93 Difference]: Finished difference Result 993 states and 2136 transitions. [2021-08-12 19:31:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:31:49,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:31:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:49,437 INFO L225 Difference]: With dead ends: 993 [2021-08-12 19:31:49,437 INFO L226 Difference]: Without dead ends: 940 [2021-08-12 19:31:49,438 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 721.4ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 19:31:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-08-12 19:31:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-08-12 19:31:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-08-12 19:31:49,465 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-08-12 19:31:49,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:49,465 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-08-12 19:31:49,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-08-12 19:31:49,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:31:49,466 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:49,466 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:49,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:31:49,677 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-08-12 19:31:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:49,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688654709] [2021-08-12 19:31:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:49,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:49,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688654709] [2021-08-12 19:31:49,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688654709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:49,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950479005] [2021-08-12 19:31:49,775 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 [2021-08-12 19:31:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 19:31:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:50,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:50,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950479005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:50,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:50,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-12 19:31:50,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731216176] [2021-08-12 19:31:50,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:31:50,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:31:50,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:31:50,060 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:51,045 INFO L93 Difference]: Finished difference Result 815 states and 1729 transitions. [2021-08-12 19:31:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:31:51,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:31:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:51,050 INFO L225 Difference]: With dead ends: 815 [2021-08-12 19:31:51,050 INFO L226 Difference]: Without dead ends: 794 [2021-08-12 19:31:51,053 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 19:31:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-08-12 19:31:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-08-12 19:31:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-08-12 19:31:51,081 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-08-12 19:31:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:51,081 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-08-12 19:31:51,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-08-12 19:31:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:31:51,082 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:51,082 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:51,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:31:51,306 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:51,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-08-12 19:31:51,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:51,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640129127] [2021-08-12 19:31:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:51,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:51,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640129127] [2021-08-12 19:31:51,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640129127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:51,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582497673] [2021-08-12 19:31:51,392 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 [2021-08-12 19:31:51,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:31:51,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:51,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:31:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:51,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582497673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:51,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:51,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-12 19:31:51,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465306861] [2021-08-12 19:31:51,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:31:51,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:31:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:31:51,669 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:52,607 INFO L93 Difference]: Finished difference Result 695 states and 1454 transitions. [2021-08-12 19:31:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:31:52,608 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:31:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:52,610 INFO L225 Difference]: With dead ends: 695 [2021-08-12 19:31:52,611 INFO L226 Difference]: Without dead ends: 638 [2021-08-12 19:31:52,612 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:31:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-12 19:31:52,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-08-12 19:31:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-08-12 19:31:52,639 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-08-12 19:31:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:52,639 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-08-12 19:31:52,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-08-12 19:31:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:31:52,640 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:52,640 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:52,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:52,857 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:52,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-08-12 19:31:52,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:52,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80020310] [2021-08-12 19:31:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:52,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:52,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80020310] [2021-08-12 19:31:52,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80020310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:52,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017752983] [2021-08-12 19:31:52,929 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 [2021-08-12 19:31:52,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:31:52,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:52,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:31:52,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:53,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017752983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:53,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:53,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-08-12 19:31:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961880598] [2021-08-12 19:31:53,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:31:53,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:53,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:31:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:31:53,177 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:53,981 INFO L93 Difference]: Finished difference Result 533 states and 1082 transitions. [2021-08-12 19:31:53,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:31:53,981 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:31:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:53,984 INFO L225 Difference]: With dead ends: 533 [2021-08-12 19:31:53,984 INFO L226 Difference]: Without dead ends: 516 [2021-08-12 19:31:53,985 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 19:31:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-08-12 19:31:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-08-12 19:31:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-08-12 19:31:54,010 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-08-12 19:31:54,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:54,010 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-08-12 19:31:54,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-08-12 19:31:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:31:54,011 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:54,011 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:54,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:54,225 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-08-12 19:31:54,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:54,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673897858] [2021-08-12 19:31:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:54,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:54,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673897858] [2021-08-12 19:31:54,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673897858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:54,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992722910] [2021-08-12 19:31:54,312 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 [2021-08-12 19:31:54,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:31:54,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:54,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:31:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:54,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992722910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:54,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:54,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 19:31:54,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408978129] [2021-08-12 19:31:54,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:31:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:31:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:31:54,407 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:54,537 INFO L93 Difference]: Finished difference Result 494 states and 1030 transitions. [2021-08-12 19:31:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:31:54,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:31:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:54,540 INFO L225 Difference]: With dead ends: 494 [2021-08-12 19:31:54,540 INFO L226 Difference]: Without dead ends: 453 [2021-08-12 19:31:54,541 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:31:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-12 19:31:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-08-12 19:31:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-08-12 19:31:54,573 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-08-12 19:31:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:54,573 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-08-12 19:31:54,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-08-12 19:31:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:31:54,574 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:54,574 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:54,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:31:54,797 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:54,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-08-12 19:31:54,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:54,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67427125] [2021-08-12 19:31:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67427125] [2021-08-12 19:31:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67427125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997245634] [2021-08-12 19:31:54,947 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 [2021-08-12 19:31:54,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:31:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:54,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:31:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:55,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997245634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:55,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:55,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-12 19:31:55,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441199998] [2021-08-12 19:31:55,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:31:55,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:31:55,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:31:55,249 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:56,561 INFO L93 Difference]: Finished difference Result 787 states and 1626 transitions. [2021-08-12 19:31:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:31:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:31:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:56,566 INFO L225 Difference]: With dead ends: 787 [2021-08-12 19:31:56,566 INFO L226 Difference]: Without dead ends: 766 [2021-08-12 19:31:56,567 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 984.8ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-08-12 19:31:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-12 19:31:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-08-12 19:31:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-08-12 19:31:56,604 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-08-12 19:31:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:56,604 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-08-12 19:31:56,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-08-12 19:31:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:31:56,605 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:56,605 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:56,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 19:31:56,821 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-08-12 19:31:56,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:56,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448228949] [2021-08-12 19:31:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:56,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:56,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448228949] [2021-08-12 19:31:56,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448228949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:56,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964474685] [2021-08-12 19:31:56,948 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 [2021-08-12 19:31:56,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:31:56,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:31:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:31:56,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:57,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964474685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:57,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:57,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:31:57,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429923116] [2021-08-12 19:31:57,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:31:57,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:57,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:31:57,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:31:57,224 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:31:58,701 INFO L93 Difference]: Finished difference Result 1357 states and 2814 transitions. [2021-08-12 19:31:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 19:31:58,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:31:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:31:58,706 INFO L225 Difference]: With dead ends: 1357 [2021-08-12 19:31:58,706 INFO L226 Difference]: Without dead ends: 1318 [2021-08-12 19:31:58,707 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 979.2ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-08-12 19:31:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-08-12 19:31:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-08-12 19:31:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-08-12 19:31:58,755 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-08-12 19:31:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:31:58,755 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-08-12 19:31:58,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:31:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-08-12 19:31:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:31:58,757 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:31:58,757 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:31:58,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:31:58,971 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:31:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:31:58,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-08-12 19:31:58,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:31:58,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109633995] [2021-08-12 19:31:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:31:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:59,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:31:59,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109633995] [2021-08-12 19:31:59,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109633995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:59,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654671671] [2021-08-12 19:31:59,081 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 [2021-08-12 19:31:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:31:59,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:31:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:31:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:31:59,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654671671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:31:59,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:31:59,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-08-12 19:31:59,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211473715] [2021-08-12 19:31:59,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:31:59,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:31:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:31:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:31:59,392 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:00,780 INFO L93 Difference]: Finished difference Result 1107 states and 2314 transitions. [2021-08-12 19:32:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:32:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:00,785 INFO L225 Difference]: With dead ends: 1107 [2021-08-12 19:32:00,785 INFO L226 Difference]: Without dead ends: 1090 [2021-08-12 19:32:00,786 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 19:32:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-08-12 19:32:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-08-12 19:32:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-08-12 19:32:00,827 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-08-12 19:32:00,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:00,827 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-08-12 19:32:00,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-08-12 19:32:00,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:32:00,828 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:00,828 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:01,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 19:32:01,043 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-08-12 19:32:01,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:01,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133553703] [2021-08-12 19:32:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:01,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133553703] [2021-08-12 19:32:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133553703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238972562] [2021-08-12 19:32:01,161 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 [2021-08-12 19:32:01,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:32:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:01,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:32:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:01,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238972562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:01,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:01,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-12 19:32:01,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526700740] [2021-08-12 19:32:01,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:32:01,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:32:01,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:32:01,441 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:02,792 INFO L93 Difference]: Finished difference Result 1742 states and 3715 transitions. [2021-08-12 19:32:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 19:32:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:02,797 INFO L225 Difference]: With dead ends: 1742 [2021-08-12 19:32:02,797 INFO L226 Difference]: Without dead ends: 1631 [2021-08-12 19:32:02,798 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 802.2ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 19:32:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-08-12 19:32:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-08-12 19:32:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-08-12 19:32:02,857 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-08-12 19:32:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:02,858 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-08-12 19:32:02,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-08-12 19:32:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:32:02,859 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:02,859 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:03,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:32:03,082 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:03,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-08-12 19:32:03,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:03,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324482463] [2021-08-12 19:32:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:03,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:03,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324482463] [2021-08-12 19:32:03,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324482463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:03,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511782998] [2021-08-12 19:32:03,165 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 [2021-08-12 19:32:03,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:32:03,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:32:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:03,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511782998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:03,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:03,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-08-12 19:32:03,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960750304] [2021-08-12 19:32:03,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:32:03,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:03,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:32:03,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:32:03,457 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:05,113 INFO L93 Difference]: Finished difference Result 1327 states and 2809 transitions. [2021-08-12 19:32:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-12 19:32:05,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:05,118 INFO L225 Difference]: With dead ends: 1327 [2021-08-12 19:32:05,119 INFO L226 Difference]: Without dead ends: 1310 [2021-08-12 19:32:05,120 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1110.1ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-08-12 19:32:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-08-12 19:32:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-08-12 19:32:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-08-12 19:32:05,173 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-08-12 19:32:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:05,174 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-08-12 19:32:05,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-08-12 19:32:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:32:05,175 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:05,175 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:05,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:05,375 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-08-12 19:32:05,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:05,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5741660] [2021-08-12 19:32:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:05,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5741660] [2021-08-12 19:32:05,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5741660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530426379] [2021-08-12 19:32:05,484 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 [2021-08-12 19:32:05,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:32:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 19:32:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:05,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530426379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:05,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:05,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-12 19:32:05,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610340693] [2021-08-12 19:32:05,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:32:05,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:32:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:32:05,800 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:07,308 INFO L93 Difference]: Finished difference Result 1186 states and 2571 transitions. [2021-08-12 19:32:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 19:32:07,309 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:32:07,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:07,313 INFO L225 Difference]: With dead ends: 1186 [2021-08-12 19:32:07,313 INFO L226 Difference]: Without dead ends: 1099 [2021-08-12 19:32:07,315 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1030.6ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-08-12 19:32:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-08-12 19:32:07,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-08-12 19:32:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-08-12 19:32:07,375 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-08-12 19:32:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:07,376 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-08-12 19:32:07,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-08-12 19:32:07,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:32:07,377 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:07,377 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:07,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:07,587 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-08-12 19:32:07,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:07,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489544260] [2021-08-12 19:32:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:07,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:07,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489544260] [2021-08-12 19:32:07,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489544260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:07,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729303700] [2021-08-12 19:32:07,652 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 [2021-08-12 19:32:07,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:32:07,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:07,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 19:32:07,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:07,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729303700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:07,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:07,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-08-12 19:32:07,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118711178] [2021-08-12 19:32:07,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:32:07,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:07,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:32:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:32:07,943 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:09,384 INFO L93 Difference]: Finished difference Result 953 states and 2046 transitions. [2021-08-12 19:32:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 19:32:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:32:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:09,387 INFO L225 Difference]: With dead ends: 953 [2021-08-12 19:32:09,388 INFO L226 Difference]: Without dead ends: 936 [2021-08-12 19:32:09,388 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1015.6ms TimeCoverageRelationStatistics Valid=1104, Invalid=3452, Unknown=0, NotChecked=0, Total=4556 [2021-08-12 19:32:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-08-12 19:32:09,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 572. [2021-08-12 19:32:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-08-12 19:32:09,446 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-08-12 19:32:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:09,446 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-08-12 19:32:09,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-08-12 19:32:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:32:09,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:09,447 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:09,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:32:09,654 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-08-12 19:32:09,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:09,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724047971] [2021-08-12 19:32:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:09,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:09,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724047971] [2021-08-12 19:32:09,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724047971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:09,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338619683] [2021-08-12 19:32:09,738 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 [2021-08-12 19:32:09,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:32:09,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:09,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:32:09,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:09,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338619683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:09,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:09,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-08-12 19:32:09,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067998397] [2021-08-12 19:32:09,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:32:09,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:32:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:32:09,912 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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) [2021-08-12 19:32:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:10,316 INFO L93 Difference]: Finished difference Result 965 states and 2138 transitions. [2021-08-12 19:32:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:32:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 35 [2021-08-12 19:32:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:10,320 INFO L225 Difference]: With dead ends: 965 [2021-08-12 19:32:10,321 INFO L226 Difference]: Without dead ends: 896 [2021-08-12 19:32:10,321 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:32:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-08-12 19:32:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-08-12 19:32:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:10,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-08-12 19:32:10,420 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-08-12 19:32:10,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:10,420 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-08-12 19:32:10,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) 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) [2021-08-12 19:32:10,421 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-08-12 19:32:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:32:10,422 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:10,422 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:10,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:10,646 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:10,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 25 times [2021-08-12 19:32:10,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:10,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027676226] [2021-08-12 19:32:10,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:10,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:10,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027676226] [2021-08-12 19:32:10,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027676226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:10,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811769243] [2021-08-12 19:32:10,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:32:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:32:10,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:11,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811769243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:11,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:11,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-12 19:32:11,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211742896] [2021-08-12 19:32:11,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:32:11,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:32:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:32:11,146 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:13,772 INFO L93 Difference]: Finished difference Result 2191 states and 4726 transitions. [2021-08-12 19:32:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-12 19:32:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:32:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:13,779 INFO L225 Difference]: With dead ends: 2191 [2021-08-12 19:32:13,779 INFO L226 Difference]: Without dead ends: 2150 [2021-08-12 19:32:13,781 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1357.8ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-08-12 19:32:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-08-12 19:32:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 800. [2021-08-12 19:32:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3617021276595747) internal successors, (1887), 799 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1887 transitions. [2021-08-12 19:32:13,897 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1887 transitions. Word has length 35 [2021-08-12 19:32:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:13,897 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1887 transitions. [2021-08-12 19:32:13,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1887 transitions. [2021-08-12 19:32:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:32:13,899 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:13,899 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:14,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 19:32:14,111 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 26 times [2021-08-12 19:32:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:14,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289760807] [2021-08-12 19:32:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:14,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:14,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289760807] [2021-08-12 19:32:14,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289760807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:14,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167839181] [2021-08-12 19:32:14,250 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 [2021-08-12 19:32:14,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:32:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:32:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:14,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167839181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:14,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:14,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-12 19:32:14,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016198754] [2021-08-12 19:32:14,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:32:14,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:32:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:32:14,643 INFO L87 Difference]: Start difference. First operand 800 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:17,002 INFO L93 Difference]: Finished difference Result 1800 states and 3900 transitions. [2021-08-12 19:32:17,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-12 19:32:17,002 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:32:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:17,007 INFO L225 Difference]: With dead ends: 1800 [2021-08-12 19:32:17,008 INFO L226 Difference]: Without dead ends: 1783 [2021-08-12 19:32:17,008 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1265.0ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 19:32:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-08-12 19:32:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 712. [2021-08-12 19:32:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-08-12 19:32:17,108 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-08-12 19:32:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:17,108 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-08-12 19:32:17,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-08-12 19:32:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:32:17,110 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:17,110 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:17,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:17,310 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:17,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 27 times [2021-08-12 19:32:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:17,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541787551] [2021-08-12 19:32:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:17,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:17,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541787551] [2021-08-12 19:32:17,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541787551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:17,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171909944] [2021-08-12 19:32:17,453 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 [2021-08-12 19:32:17,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 19:32:17,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:32:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:17,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171909944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:17,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:17,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-12 19:32:17,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562638025] [2021-08-12 19:32:17,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:32:17,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:17,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:32:17,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:32:17,802 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:20,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:20,800 INFO L93 Difference]: Finished difference Result 2764 states and 5908 transitions. [2021-08-12 19:32:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-12 19:32:20,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:32:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:20,808 INFO L225 Difference]: With dead ends: 2764 [2021-08-12 19:32:20,808 INFO L226 Difference]: Without dead ends: 2653 [2021-08-12 19:32:20,809 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1358.4ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-08-12 19:32:20,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-08-12 19:32:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 712. [2021-08-12 19:32:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-08-12 19:32:20,907 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-08-12 19:32:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:20,907 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-08-12 19:32:20,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-08-12 19:32:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:32:20,908 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:20,908 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:21,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-12 19:32:21,125 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 28 times [2021-08-12 19:32:21,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:21,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485383917] [2021-08-12 19:32:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:21,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:21,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485383917] [2021-08-12 19:32:21,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485383917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:21,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075169093] [2021-08-12 19:32:21,252 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 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 [2021-08-12 19:32:21,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:32:21,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:32:21,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:21,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075169093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:21,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:21,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-12 19:32:21,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619491965] [2021-08-12 19:32:21,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:32:21,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:21,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:32:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:32:21,607 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:24,511 INFO L93 Difference]: Finished difference Result 3376 states and 7465 transitions. [2021-08-12 19:32:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-12 19:32:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:32:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:24,519 INFO L225 Difference]: With dead ends: 3376 [2021-08-12 19:32:24,519 INFO L226 Difference]: Without dead ends: 3170 [2021-08-12 19:32:24,520 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1209.4ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-08-12 19:32:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-08-12 19:32:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 740. [2021-08-12 19:32:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.266576454668471) internal successors, (1675), 739 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1675 transitions. [2021-08-12 19:32:24,668 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1675 transitions. Word has length 35 [2021-08-12 19:32:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:24,668 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1675 transitions. [2021-08-12 19:32:24,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1675 transitions. [2021-08-12 19:32:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:32:24,670 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:24,670 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:24,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:32:24,893 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1190311629, now seen corresponding path program 29 times [2021-08-12 19:32:24,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:24,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13325597] [2021-08-12 19:32:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:24,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:24,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13325597] [2021-08-12 19:32:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13325597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:24,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129451333] [2021-08-12 19:32:24,971 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 [2021-08-12 19:32:24,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:32:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 19:32:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:25,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129451333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:25,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:25,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-08-12 19:32:25,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614287034] [2021-08-12 19:32:25,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:32:25,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:32:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:32:25,297 INFO L87 Difference]: Start difference. First operand 740 states and 1675 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:28,153 INFO L93 Difference]: Finished difference Result 2180 states and 4681 transitions. [2021-08-12 19:32:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-12 19:32:28,153 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:32:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:28,157 INFO L225 Difference]: With dead ends: 2180 [2021-08-12 19:32:28,157 INFO L226 Difference]: Without dead ends: 2163 [2021-08-12 19:32:28,157 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1525.2ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-08-12 19:32:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-08-12 19:32:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 800. [2021-08-12 19:32:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3204005006257824) internal successors, (1854), 799 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1854 transitions. [2021-08-12 19:32:28,283 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1854 transitions. Word has length 35 [2021-08-12 19:32:28,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:28,283 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1854 transitions. [2021-08-12 19:32:28,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:28,284 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1854 transitions. [2021-08-12 19:32:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:32:28,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:28,285 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:28,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 19:32:28,494 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:28,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:28,495 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 30 times [2021-08-12 19:32:28,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:28,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713249796] [2021-08-12 19:32:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:28,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:28,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713249796] [2021-08-12 19:32:28,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713249796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:28,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523189223] [2021-08-12 19:32:28,622 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 [2021-08-12 19:32:28,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:32:28,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:32:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:29,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523189223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:29,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:29,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-12 19:32:29,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182589236] [2021-08-12 19:32:29,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:32:29,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:32:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:32:29,020 INFO L87 Difference]: Start difference. First operand 800 states and 1854 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:31,494 INFO L93 Difference]: Finished difference Result 1638 states and 3559 transitions. [2021-08-12 19:32:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 19:32:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-12 19:32:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:31,497 INFO L225 Difference]: With dead ends: 1638 [2021-08-12 19:32:31,498 INFO L226 Difference]: Without dead ends: 1515 [2021-08-12 19:32:31,498 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 1436.6ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-08-12 19:32:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-08-12 19:32:31,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 807. [2021-08-12 19:32:31,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3089330024813894) internal successors, (1861), 806 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1861 transitions. [2021-08-12 19:32:31,626 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1861 transitions. Word has length 37 [2021-08-12 19:32:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:31,626 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1861 transitions. [2021-08-12 19:32:31,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1861 transitions. [2021-08-12 19:32:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:32:31,627 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:31,627 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:31,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:31,828 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 31 times [2021-08-12 19:32:31,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:31,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776123230] [2021-08-12 19:32:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:31,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776123230] [2021-08-12 19:32:31,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776123230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:31,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119245244] [2021-08-12 19:32:31,912 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 [2021-08-12 19:32:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:31,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:32:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:32,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119245244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:32,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:32,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-08-12 19:32:32,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392082879] [2021-08-12 19:32:32,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:32:32,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:32:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:32:32,242 INFO L87 Difference]: Start difference. First operand 807 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:34,527 INFO L93 Difference]: Finished difference Result 1328 states and 2869 transitions. [2021-08-12 19:32:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 19:32:34,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-12 19:32:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:34,530 INFO L225 Difference]: With dead ends: 1328 [2021-08-12 19:32:34,530 INFO L226 Difference]: Without dead ends: 1311 [2021-08-12 19:32:34,531 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1337.6ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-08-12 19:32:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-08-12 19:32:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 787. [2021-08-12 19:32:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.3155216284987277) internal successors, (1820), 786 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1820 transitions. [2021-08-12 19:32:34,640 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1820 transitions. Word has length 37 [2021-08-12 19:32:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:34,640 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1820 transitions. [2021-08-12 19:32:34,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1820 transitions. [2021-08-12 19:32:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:32:34,641 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:34,641 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:34,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 19:32:34,848 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:34,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1424137007, now seen corresponding path program 32 times [2021-08-12 19:32:34,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:34,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320832148] [2021-08-12 19:32:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:32:34,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:34,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320832148] [2021-08-12 19:32:34,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320832148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:34,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783626656] [2021-08-12 19:32:34,934 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 [2021-08-12 19:32:34,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:32:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:34,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 19:32:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:35,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783626656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:35,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:35,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-08-12 19:32:35,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233337402] [2021-08-12 19:32:35,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:32:35,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:32:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:32:35,233 INFO L87 Difference]: Start difference. First operand 787 states and 1820 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:37,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:37,330 INFO L93 Difference]: Finished difference Result 2108 states and 4651 transitions. [2021-08-12 19:32:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:32:37,330 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-12 19:32:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:37,335 INFO L225 Difference]: With dead ends: 2108 [2021-08-12 19:32:37,335 INFO L226 Difference]: Without dead ends: 2082 [2021-08-12 19:32:37,336 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 926.3ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-08-12 19:32:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-08-12 19:32:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1285. [2021-08-12 19:32:37,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.367601246105919) internal successors, (3040), 1284 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3040 transitions. [2021-08-12 19:32:37,548 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3040 transitions. Word has length 37 [2021-08-12 19:32:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:37,548 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 3040 transitions. [2021-08-12 19:32:37,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3040 transitions. [2021-08-12 19:32:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:32:37,550 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:37,551 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:37,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 19:32:37,765 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-08-12 19:32:37,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:37,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789933867] [2021-08-12 19:32:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:37,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789933867] [2021-08-12 19:32:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789933867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:37,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614877559] [2021-08-12 19:32:37,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:32:37,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:32:37,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:37,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:32:37,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:38,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614877559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:38,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:38,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-08-12 19:32:38,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066900405] [2021-08-12 19:32:38,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:32:38,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:38,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:32:38,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:32:38,046 INFO L87 Difference]: Start difference. First operand 1285 states and 3040 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:38,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:38,912 INFO L93 Difference]: Finished difference Result 1944 states and 4525 transitions. [2021-08-12 19:32:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:32:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:32:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:38,916 INFO L225 Difference]: With dead ends: 1944 [2021-08-12 19:32:38,917 INFO L226 Difference]: Without dead ends: 1874 [2021-08-12 19:32:38,917 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:32:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-08-12 19:32:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1608. [2021-08-12 19:32:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.40261356565028) internal successors, (3861), 1607 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 3861 transitions. [2021-08-12 19:32:39,150 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 3861 transitions. Word has length 39 [2021-08-12 19:32:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:39,150 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 3861 transitions. [2021-08-12 19:32:39,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 3861 transitions. [2021-08-12 19:32:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:32:39,152 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:39,152 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:39,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-12 19:32:39,362 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 34 times [2021-08-12 19:32:39,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:39,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408088227] [2021-08-12 19:32:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:39,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:39,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408088227] [2021-08-12 19:32:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408088227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:39,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426086904] [2021-08-12 19:32:39,491 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 [2021-08-12 19:32:39,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:32:39,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:39,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:32:39,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:39,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426086904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:39,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:39,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-08-12 19:32:39,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671010497] [2021-08-12 19:32:39,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:32:39,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:39,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:32:39,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:32:39,942 INFO L87 Difference]: Start difference. First operand 1608 states and 3861 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:44,095 INFO L93 Difference]: Finished difference Result 3101 states and 6985 transitions. [2021-08-12 19:32:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-12 19:32:44,095 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:32:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:44,102 INFO L225 Difference]: With dead ends: 3101 [2021-08-12 19:32:44,102 INFO L226 Difference]: Without dead ends: 3084 [2021-08-12 19:32:44,103 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1693.0ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-08-12 19:32:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-08-12 19:32:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1766. [2021-08-12 19:32:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-08-12 19:32:44,431 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-08-12 19:32:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:44,431 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-08-12 19:32:44,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-08-12 19:32:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:32:44,433 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:44,433 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:44,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-08-12 19:32:44,638 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 35 times [2021-08-12 19:32:44,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:44,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699185848] [2021-08-12 19:32:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:44,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699185848] [2021-08-12 19:32:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699185848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256636292] [2021-08-12 19:32:44,772 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 [2021-08-12 19:32:44,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-12 19:32:44,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:44,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:32:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:45,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256636292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:45,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:45,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-08-12 19:32:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136722660] [2021-08-12 19:32:45,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 19:32:45,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 19:32:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:32:45,144 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:50,790 INFO L93 Difference]: Finished difference Result 4779 states and 10785 transitions. [2021-08-12 19:32:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-12 19:32:50,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:32:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:50,798 INFO L225 Difference]: With dead ends: 4779 [2021-08-12 19:32:50,798 INFO L226 Difference]: Without dead ends: 4714 [2021-08-12 19:32:50,800 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 1916.3ms TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-08-12 19:32:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-08-12 19:32:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 1566. [2021-08-12 19:32:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-08-12 19:32:51,061 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-08-12 19:32:51,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:51,061 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-08-12 19:32:51,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-08-12 19:32:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:32:51,063 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:51,063 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:51,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:51,265 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 36 times [2021-08-12 19:32:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:51,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799561110] [2021-08-12 19:32:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:51,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799561110] [2021-08-12 19:32:51,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799561110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173818756] [2021-08-12 19:32:51,425 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 [2021-08-12 19:32:51,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:32:51,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:51,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:32:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:51,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173818756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:51,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:51,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-12 19:32:51,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694715028] [2021-08-12 19:32:51,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 19:32:51,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:51,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 19:32:51,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:32:51,813 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:57,943 INFO L93 Difference]: Finished difference Result 5540 states and 12367 transitions. [2021-08-12 19:32:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 19:32:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:32:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:57,950 INFO L225 Difference]: With dead ends: 5540 [2021-08-12 19:32:57,950 INFO L226 Difference]: Without dead ends: 5397 [2021-08-12 19:32:57,951 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1569.6ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-08-12 19:32:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-08-12 19:32:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-08-12 19:32:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-08-12 19:32:58,215 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-08-12 19:32:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:58,215 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-08-12 19:32:58,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-08-12 19:32:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:32:58,217 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:58,217 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:58,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-12 19:32:58,418 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:58,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 37 times [2021-08-12 19:32:58,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:58,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969165579] [2021-08-12 19:32:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:58,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:58,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969165579] [2021-08-12 19:32:58,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969165579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:58,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128501166] [2021-08-12 19:32:58,595 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 [2021-08-12 19:32:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:58,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:32:58,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:59,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128501166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:59,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:59,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-08-12 19:32:59,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833894467] [2021-08-12 19:32:59,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-08-12 19:32:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-12 19:32:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:32:59,052 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:05,421 INFO L93 Difference]: Finished difference Result 5946 states and 13577 transitions. [2021-08-12 19:33:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-12 19:33:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:33:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:05,428 INFO L225 Difference]: With dead ends: 5946 [2021-08-12 19:33:05,428 INFO L226 Difference]: Without dead ends: 5656 [2021-08-12 19:33:05,429 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1656.2ms TimeCoverageRelationStatistics Valid=1779, Invalid=7533, Unknown=0, NotChecked=0, Total=9312 [2021-08-12 19:33:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-08-12 19:33:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 1758. [2021-08-12 19:33:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:05,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-08-12 19:33:05,737 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-08-12 19:33:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:05,737 INFO L482 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-08-12 19:33:05,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-08-12 19:33:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:33:05,740 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:05,740 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:05,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-12 19:33:05,964 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:05,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:05,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 38 times [2021-08-12 19:33:05,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:05,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024325777] [2021-08-12 19:33:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:06,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:06,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024325777] [2021-08-12 19:33:06,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024325777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:06,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282996525] [2021-08-12 19:33:06,062 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 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 [2021-08-12 19:33:06,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:06,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:06,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:33:06,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:06,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282996525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:06,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:06,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-08-12 19:33:06,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589616038] [2021-08-12 19:33:06,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:33:06,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:06,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:33:06,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:33:06,499 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:12,371 INFO L93 Difference]: Finished difference Result 3971 states and 8795 transitions. [2021-08-12 19:33:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-12 19:33:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:33:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:12,376 INFO L225 Difference]: With dead ends: 3971 [2021-08-12 19:33:12,376 INFO L226 Difference]: Without dead ends: 3954 [2021-08-12 19:33:12,377 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2298.3ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-08-12 19:33:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-08-12 19:33:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-08-12 19:33:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-08-12 19:33:12,674 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-08-12 19:33:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:12,675 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-08-12 19:33:12,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-08-12 19:33:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:33:12,677 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:12,677 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:12,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:12,901 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 39 times [2021-08-12 19:33:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:12,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641138441] [2021-08-12 19:33:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:13,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:13,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641138441] [2021-08-12 19:33:13,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641138441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:13,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186303886] [2021-08-12 19:33:13,095 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 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 [2021-08-12 19:33:13,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 19:33:13,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:13,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 19:33:13,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:13,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186303886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:13,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:13,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-12 19:33:13,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825072790] [2021-08-12 19:33:13,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-08-12 19:33:13,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-12 19:33:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:33:13,572 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:18,114 INFO L93 Difference]: Finished difference Result 3283 states and 7456 transitions. [2021-08-12 19:33:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-12 19:33:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:33:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:18,118 INFO L225 Difference]: With dead ends: 3283 [2021-08-12 19:33:18,119 INFO L226 Difference]: Without dead ends: 3049 [2021-08-12 19:33:18,120 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1970.6ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-08-12 19:33:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-08-12 19:33:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1787. [2021-08-12 19:33:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-08-12 19:33:18,442 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-08-12 19:33:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:18,442 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-08-12 19:33:18,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-08-12 19:33:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-12 19:33:18,444 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:18,444 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:18,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-12 19:33:18,645 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 40 times [2021-08-12 19:33:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:18,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523118682] [2021-08-12 19:33:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:18,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:18,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523118682] [2021-08-12 19:33:18,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523118682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:18,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873659396] [2021-08-12 19:33:18,739 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 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 [2021-08-12 19:33:18,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:18,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:18,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:33:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:19,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873659396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:19,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:19,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-08-12 19:33:19,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602898101] [2021-08-12 19:33:19,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:33:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:33:19,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:33:19,165 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:23,241 INFO L93 Difference]: Finished difference Result 2450 states and 5538 transitions. [2021-08-12 19:33:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-12 19:33:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-12 19:33:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:23,245 INFO L225 Difference]: With dead ends: 2450 [2021-08-12 19:33:23,245 INFO L226 Difference]: Without dead ends: 2433 [2021-08-12 19:33:23,246 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1890.0ms TimeCoverageRelationStatistics Valid=2626, Invalid=8504, Unknown=0, NotChecked=0, Total=11130 [2021-08-12 19:33:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-08-12 19:33:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1763. [2021-08-12 19:33:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-08-12 19:33:23,580 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-08-12 19:33:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:23,580 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-08-12 19:33:23,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-08-12 19:33:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:33:23,582 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:23,582 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:23,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:23,783 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 41 times [2021-08-12 19:33:23,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:23,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699834717] [2021-08-12 19:33:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:23,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:23,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699834717] [2021-08-12 19:33:23,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699834717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:23,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401883639] [2021-08-12 19:33:23,890 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 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 [2021-08-12 19:33:23,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:33:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:33:23,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:24,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401883639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:24,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:24,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-12 19:33:24,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370854547] [2021-08-12 19:33:24,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:33:24,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:33:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:33:24,006 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:25,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:25,586 INFO L93 Difference]: Finished difference Result 2488 states and 5829 transitions. [2021-08-12 19:33:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:33:25,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:33:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:25,591 INFO L225 Difference]: With dead ends: 2488 [2021-08-12 19:33:25,591 INFO L226 Difference]: Without dead ends: 2429 [2021-08-12 19:33:25,591 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:33:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-08-12 19:33:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2196. [2021-08-12 19:33:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.4314350797266515) internal successors, (5337), 2195 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) [2021-08-12 19:33:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5337 transitions. [2021-08-12 19:33:25,983 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5337 transitions. Word has length 43 [2021-08-12 19:33:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:25,983 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 5337 transitions. [2021-08-12 19:33:25,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5337 transitions. [2021-08-12 19:33:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:33:25,986 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:25,986 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:26,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 19:33:26,187 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:26,187 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 42 times [2021-08-12 19:33:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:26,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29361064] [2021-08-12 19:33:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:26,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:26,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29361064] [2021-08-12 19:33:26,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29361064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:26,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776756407] [2021-08-12 19:33:26,348 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 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 [2021-08-12 19:33:26,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-12 19:33:26,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:26,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 19:33:26,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:26,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776756407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:26,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:26,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-08-12 19:33:26,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281785066] [2021-08-12 19:33:26,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-08-12 19:33:26,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-12 19:33:26,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:33:26,854 INFO L87 Difference]: Start difference. First operand 2196 states and 5337 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:34,126 INFO L93 Difference]: Finished difference Result 5099 states and 11670 transitions. [2021-08-12 19:33:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-12 19:33:34,126 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:33:34,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:34,132 INFO L225 Difference]: With dead ends: 5099 [2021-08-12 19:33:34,132 INFO L226 Difference]: Without dead ends: 5049 [2021-08-12 19:33:34,134 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 2147.3ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-08-12 19:33:34,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-08-12 19:33:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2469. [2021-08-12 19:33:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.4315235008103726) internal successors, (6001), 2468 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) [2021-08-12 19:33:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 6001 transitions. [2021-08-12 19:33:34,548 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 6001 transitions. Word has length 43 [2021-08-12 19:33:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:34,549 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 6001 transitions. [2021-08-12 19:33:34,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:34,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 6001 transitions. [2021-08-12 19:33:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:33:34,551 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:34,551 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:34,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-12 19:33:34,765 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 43 times [2021-08-12 19:33:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:34,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077315323] [2021-08-12 19:33:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:34,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077315323] [2021-08-12 19:33:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077315323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439405658] [2021-08-12 19:33:34,920 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 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 [2021-08-12 19:33:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:34,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 19:33:34,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:35,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439405658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:35,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:35,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-08-12 19:33:35,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242813546] [2021-08-12 19:33:35,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 19:33:35,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 19:33:35,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:33:35,424 INFO L87 Difference]: Start difference. First operand 2469 states and 6001 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:41,286 INFO L93 Difference]: Finished difference Result 4076 states and 9298 transitions. [2021-08-12 19:33:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-12 19:33:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:33:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:41,291 INFO L225 Difference]: With dead ends: 4076 [2021-08-12 19:33:41,292 INFO L226 Difference]: Without dead ends: 4059 [2021-08-12 19:33:41,292 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1954.4ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-08-12 19:33:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-08-12 19:33:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 2259. [2021-08-12 19:33:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.425597874224978) internal successors, (5477), 2258 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) [2021-08-12 19:33:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5477 transitions. [2021-08-12 19:33:41,682 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5477 transitions. Word has length 43 [2021-08-12 19:33:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:41,682 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5477 transitions. [2021-08-12 19:33:41,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5477 transitions. [2021-08-12 19:33:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:33:41,685 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:41,685 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:41,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:41,897 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:41,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 44 times [2021-08-12 19:33:41,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:41,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576732859] [2021-08-12 19:33:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:42,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:42,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576732859] [2021-08-12 19:33:42,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576732859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:42,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085027734] [2021-08-12 19:33:42,079 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 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 [2021-08-12 19:33:42,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:42,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:42,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:33:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:42,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085027734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:42,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:42,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-08-12 19:33:42,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995820130] [2021-08-12 19:33:42,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-08-12 19:33:42,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-12 19:33:42,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:33:42,569 INFO L87 Difference]: Start difference. First operand 2259 states and 5477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:52,079 INFO L93 Difference]: Finished difference Result 5911 states and 13223 transitions. [2021-08-12 19:33:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-12 19:33:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:33:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:52,087 INFO L225 Difference]: With dead ends: 5911 [2021-08-12 19:33:52,087 INFO L226 Difference]: Without dead ends: 5846 [2021-08-12 19:33:52,088 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 2471.3ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-08-12 19:33:52,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-08-12 19:33:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2347. [2021-08-12 19:33:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.411764705882353) internal successors, (5658), 2346 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 5658 transitions. [2021-08-12 19:33:52,548 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 5658 transitions. Word has length 43 [2021-08-12 19:33:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:52,548 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 5658 transitions. [2021-08-12 19:33:52,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 5658 transitions. [2021-08-12 19:33:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:33:52,551 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:52,551 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:52,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 19:33:52,751 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 45 times [2021-08-12 19:33:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:52,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394394283] [2021-08-12 19:33:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:52,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394394283] [2021-08-12 19:33:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394394283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:52,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273494487] [2021-08-12 19:33:52,909 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 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 [2021-08-12 19:33:52,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-12 19:33:52,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:52,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-12 19:33:52,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:53,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273494487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:53,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:53,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-08-12 19:33:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126287727] [2021-08-12 19:33:53,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-08-12 19:33:53,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-12 19:33:53,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:33:53,446 INFO L87 Difference]: Start difference. First operand 2347 states and 5658 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:05,037 INFO L93 Difference]: Finished difference Result 7669 states and 17091 transitions. [2021-08-12 19:34:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-12 19:34:05,037 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:34:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:05,046 INFO L225 Difference]: With dead ends: 7669 [2021-08-12 19:34:05,046 INFO L226 Difference]: Without dead ends: 7478 [2021-08-12 19:34:05,047 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 2376.8ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-08-12 19:34:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-08-12 19:34:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 2225. [2021-08-12 19:34:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 2.428956834532374) internal successors, (5402), 2224 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 5402 transitions. [2021-08-12 19:34:05,491 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 5402 transitions. Word has length 43 [2021-08-12 19:34:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:05,491 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 5402 transitions. [2021-08-12 19:34:05,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 5402 transitions. [2021-08-12 19:34:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:34:05,493 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:05,493 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:05,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:05,694 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:05,694 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 46 times [2021-08-12 19:34:05,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:05,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670794425] [2021-08-12 19:34:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:05,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:05,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670794425] [2021-08-12 19:34:05,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670794425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:05,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160451241] [2021-08-12 19:34:05,876 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 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 [2021-08-12 19:34:05,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:34:05,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:05,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:34:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:06,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160451241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:06,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:06,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-08-12 19:34:06,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704872281] [2021-08-12 19:34:06,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-08-12 19:34:06,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:06,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-12 19:34:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:34:06,327 INFO L87 Difference]: Start difference. First operand 2225 states and 5402 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:20,140 INFO L93 Difference]: Finished difference Result 8481 states and 18830 transitions. [2021-08-12 19:34:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-12 19:34:20,141 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:34:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:20,150 INFO L225 Difference]: With dead ends: 8481 [2021-08-12 19:34:20,150 INFO L226 Difference]: Without dead ends: 8230 [2021-08-12 19:34:20,152 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 2073.9ms TimeCoverageRelationStatistics Valid=2344, Invalid=10996, Unknown=0, NotChecked=0, Total=13340 [2021-08-12 19:34:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-08-12 19:34:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 2241. [2021-08-12 19:34:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.4258928571428573) internal successors, (5434), 2240 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 5434 transitions. [2021-08-12 19:34:20,633 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 5434 transitions. Word has length 43 [2021-08-12 19:34:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:20,633 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 5434 transitions. [2021-08-12 19:34:20,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 5434 transitions. [2021-08-12 19:34:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:34:20,636 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:20,636 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:20,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-12 19:34:20,847 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:20,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 47 times [2021-08-12 19:34:20,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:20,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412732839] [2021-08-12 19:34:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:21,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:21,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412732839] [2021-08-12 19:34:21,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412732839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:21,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622611960] [2021-08-12 19:34:21,041 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 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 [2021-08-12 19:34:21,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:34:21,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:21,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:34:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:21,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622611960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:21,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:21,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-08-12 19:34:21,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965332856] [2021-08-12 19:34:21,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 19:34:21,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:21,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 19:34:21,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:34:21,552 INFO L87 Difference]: Start difference. First operand 2241 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:35,435 INFO L93 Difference]: Finished difference Result 7885 states and 17825 transitions. [2021-08-12 19:34:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-12 19:34:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:34:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:35,443 INFO L225 Difference]: With dead ends: 7885 [2021-08-12 19:34:35,444 INFO L226 Difference]: Without dead ends: 7508 [2021-08-12 19:34:35,445 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 2484.8ms TimeCoverageRelationStatistics Valid=3415, Invalid=13615, Unknown=0, NotChecked=0, Total=17030 [2021-08-12 19:34:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-08-12 19:34:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 2254. [2021-08-12 19:34:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.361739902352419) internal successors, (5321), 2253 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5321 transitions. [2021-08-12 19:34:36,019 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5321 transitions. Word has length 43 [2021-08-12 19:34:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:36,019 INFO L482 AbstractCegarLoop]: Abstraction has 2254 states and 5321 transitions. [2021-08-12 19:34:36,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5321 transitions. [2021-08-12 19:34:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:34:36,021 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:36,021 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:36,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:36,225 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 48 times [2021-08-12 19:34:36,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:36,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885792156] [2021-08-12 19:34:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:36,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:36,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885792156] [2021-08-12 19:34:36,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885792156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:36,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766654867] [2021-08-12 19:34:36,340 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 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 [2021-08-12 19:34:36,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 19:34:36,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:36,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 19:34:36,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:36,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766654867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:36,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:36,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-08-12 19:34:36,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416333776] [2021-08-12 19:34:36,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:34:36,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:36,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:34:36,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:34:36,845 INFO L87 Difference]: Start difference. First operand 2254 states and 5321 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:48,358 INFO L93 Difference]: Finished difference Result 5028 states and 11103 transitions. [2021-08-12 19:34:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-08-12 19:34:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:34:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:48,364 INFO L225 Difference]: With dead ends: 5028 [2021-08-12 19:34:48,364 INFO L226 Difference]: Without dead ends: 5011 [2021-08-12 19:34:48,365 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3380.2ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-08-12 19:34:48,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-08-12 19:34:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2303. [2021-08-12 19:34:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.385317115551694) internal successors, (5491), 2302 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:48,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5491 transitions. [2021-08-12 19:34:48,926 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5491 transitions. Word has length 43 [2021-08-12 19:34:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:48,926 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 5491 transitions. [2021-08-12 19:34:48,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5491 transitions. [2021-08-12 19:34:48,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 19:34:48,928 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:48,928 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:49,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:49,129 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:49,129 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 49 times [2021-08-12 19:34:49,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:49,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865437268] [2021-08-12 19:34:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:49,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:49,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865437268] [2021-08-12 19:34:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865437268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:49,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069836175] [2021-08-12 19:34:49,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:34:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:34:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069836175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:49,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:49,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-12 19:34:49,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231439386] [2021-08-12 19:34:49,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:34:49,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:49,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:34:49,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:34:49,822 INFO L87 Difference]: Start difference. First operand 2303 states and 5491 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:57,539 INFO L93 Difference]: Finished difference Result 3635 states and 8194 transitions. [2021-08-12 19:34:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-12 19:34:57,540 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 19:34:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:57,545 INFO L225 Difference]: With dead ends: 3635 [2021-08-12 19:34:57,545 INFO L226 Difference]: Without dead ends: 3422 [2021-08-12 19:34:57,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2498.7ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-08-12 19:34:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-08-12 19:34:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2306. [2021-08-12 19:34:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3800433839479394) internal successors, (5486), 2305 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5486 transitions. [2021-08-12 19:34:58,126 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5486 transitions. Word has length 45 [2021-08-12 19:34:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:58,126 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5486 transitions. [2021-08-12 19:34:58,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5486 transitions. [2021-08-12 19:34:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 19:34:58,130 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:58,130 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:58,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:58,345 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 50 times [2021-08-12 19:34:58,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:58,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653964278] [2021-08-12 19:34:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:58,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:58,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653964278] [2021-08-12 19:34:58,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653964278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:58,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899463017] [2021-08-12 19:34:58,482 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 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 [2021-08-12 19:34:58,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:58,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:58,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:34:58,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:58,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899463017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:58,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:58,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-08-12 19:34:58,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183257393] [2021-08-12 19:34:58,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:34:58,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:34:58,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:34:58,916 INFO L87 Difference]: Start difference. First operand 2306 states and 5486 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:06,268 INFO L93 Difference]: Finished difference Result 3153 states and 7138 transitions. [2021-08-12 19:35:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-12 19:35:06,268 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 19:35:06,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:06,273 INFO L225 Difference]: With dead ends: 3153 [2021-08-12 19:35:06,273 INFO L226 Difference]: Without dead ends: 3136 [2021-08-12 19:35:06,274 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2522.3ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-08-12 19:35:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-08-12 19:35:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2306. [2021-08-12 19:35:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3796095444685466) internal successors, (5485), 2305 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5485 transitions. [2021-08-12 19:35:06,838 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5485 transitions. Word has length 45 [2021-08-12 19:35:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:06,838 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5485 transitions. [2021-08-12 19:35:06,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5485 transitions. [2021-08-12 19:35:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 19:35:06,841 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:06,841 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:07,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:07,041 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1657156185, now seen corresponding path program 51 times [2021-08-12 19:35:07,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:07,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426323094] [2021-08-12 19:35:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:35:07,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:07,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426323094] [2021-08-12 19:35:07,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426323094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:07,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030888553] [2021-08-12 19:35:07,152 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 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 [2021-08-12 19:35:07,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-12 19:35:07,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 19:35:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:07,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030888553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:07,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:07,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-08-12 19:35:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829927084] [2021-08-12 19:35:07,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 19:35:07,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 19:35:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:35:07,648 INFO L87 Difference]: Start difference. First operand 2306 states and 5485 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:18,420 INFO L93 Difference]: Finished difference Result 6222 states and 14066 transitions. [2021-08-12 19:35:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-12 19:35:18,420 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 19:35:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:18,428 INFO L225 Difference]: With dead ends: 6222 [2021-08-12 19:35:18,429 INFO L226 Difference]: Without dead ends: 6205 [2021-08-12 19:35:18,430 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2427.2ms TimeCoverageRelationStatistics Valid=3242, Invalid=10098, Unknown=0, NotChecked=0, Total=13340 [2021-08-12 19:35:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-08-12 19:35:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3688. [2021-08-12 19:35:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.414429075128831) internal successors, (8902), 3687 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:19,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 8902 transitions. [2021-08-12 19:35:19,256 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 8902 transitions. Word has length 45 [2021-08-12 19:35:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:19,256 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 8902 transitions. [2021-08-12 19:35:19,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:19,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 8902 transitions. [2021-08-12 19:35:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:35:19,260 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:19,260 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:19,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-12 19:35:19,461 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 52 times [2021-08-12 19:35:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:19,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491392716] [2021-08-12 19:35:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:19,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:19,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491392716] [2021-08-12 19:35:19,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491392716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:19,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766536052] [2021-08-12 19:35:19,572 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 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 [2021-08-12 19:35:19,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:35:19,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:35:19,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:19,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766536052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:19,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:19,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-12 19:35:19,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719716773] [2021-08-12 19:35:19,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:35:19,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:35:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:35:19,690 INFO L87 Difference]: Start difference. First operand 3688 states and 8902 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:23,491 INFO L93 Difference]: Finished difference Result 4863 states and 11684 transitions. [2021-08-12 19:35:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:35:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:35:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:23,499 INFO L225 Difference]: With dead ends: 4863 [2021-08-12 19:35:23,499 INFO L226 Difference]: Without dead ends: 4798 [2021-08-12 19:35:23,499 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:35:23,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-08-12 19:35:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4433. [2021-08-12 19:35:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 2.4490072202166067) internal successors, (10854), 4432 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:24,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 10854 transitions. [2021-08-12 19:35:24,484 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 10854 transitions. Word has length 47 [2021-08-12 19:35:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:24,485 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 10854 transitions. [2021-08-12 19:35:24,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 10854 transitions. [2021-08-12 19:35:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:35:24,489 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:24,489 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:24,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:24,690 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:24,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:24,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 53 times [2021-08-12 19:35:24,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:24,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79263106] [2021-08-12 19:35:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:25,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:25,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79263106] [2021-08-12 19:35:25,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79263106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:25,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723542405] [2021-08-12 19:35:25,005 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 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 [2021-08-12 19:35:25,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-12 19:35:25,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:25,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:35:25,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:25,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723542405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:25,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:25,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-08-12 19:35:25,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243338762] [2021-08-12 19:35:25,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 19:35:25,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 19:35:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:35:25,610 INFO L87 Difference]: Start difference. First operand 4433 states and 10854 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:33,824 INFO L93 Difference]: Finished difference Result 5932 states and 14141 transitions. [2021-08-12 19:35:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-12 19:35:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:35:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:33,836 INFO L225 Difference]: With dead ends: 5932 [2021-08-12 19:35:33,836 INFO L226 Difference]: Without dead ends: 5907 [2021-08-12 19:35:33,838 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2371.7ms TimeCoverageRelationStatistics Valid=978, Invalid=10152, Unknown=0, NotChecked=0, Total=11130 [2021-08-12 19:35:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-08-12 19:35:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4386. [2021-08-12 19:35:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 2.4408209806157353) internal successors, (10703), 4385 states have internal predecessors, (10703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 10703 transitions. [2021-08-12 19:35:34,888 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 10703 transitions. Word has length 47 [2021-08-12 19:35:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:34,889 INFO L482 AbstractCegarLoop]: Abstraction has 4386 states and 10703 transitions. [2021-08-12 19:35:34,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 10703 transitions. [2021-08-12 19:35:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:35:34,894 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:34,894 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:35,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:35,101 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 54 times [2021-08-12 19:35:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:35,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243269705] [2021-08-12 19:35:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:35,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:35,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243269705] [2021-08-12 19:35:35,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243269705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:35,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536979174] [2021-08-12 19:35:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:35:35,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-12 19:35:35,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:35,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-12 19:35:35,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536979174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:35,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:35,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-08-12 19:35:35,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122503268] [2021-08-12 19:35:35,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-08-12 19:35:35,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:35,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-12 19:35:35,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:35:35,902 INFO L87 Difference]: Start difference. First operand 4386 states and 10703 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:49,871 INFO L93 Difference]: Finished difference Result 8693 states and 20064 transitions. [2021-08-12 19:35:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-12 19:35:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:35:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:49,883 INFO L225 Difference]: With dead ends: 8693 [2021-08-12 19:35:49,883 INFO L226 Difference]: Without dead ends: 8652 [2021-08-12 19:35:49,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 2716.6ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-08-12 19:35:49,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-08-12 19:35:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 4780. [2021-08-12 19:35:50,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 2.446746181209458) internal successors, (11693), 4779 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 11693 transitions. [2021-08-12 19:35:50,938 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 11693 transitions. Word has length 47 [2021-08-12 19:35:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:50,938 INFO L482 AbstractCegarLoop]: Abstraction has 4780 states and 11693 transitions. [2021-08-12 19:35:50,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 11693 transitions. [2021-08-12 19:35:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:35:50,943 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:50,943 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:51,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:51,145 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 55 times [2021-08-12 19:35:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:51,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298558003] [2021-08-12 19:35:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:51,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298558003] [2021-08-12 19:35:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298558003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256698403] [2021-08-12 19:35:51,318 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 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 [2021-08-12 19:35:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-12 19:35:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:51,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256698403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:51,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:51,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-08-12 19:35:51,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726902423] [2021-08-12 19:35:51,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-08-12 19:35:51,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:51,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-12 19:35:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:35:51,857 INFO L87 Difference]: Start difference. First operand 4780 states and 11693 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:02,471 INFO L93 Difference]: Finished difference Result 6916 states and 16192 transitions. [2021-08-12 19:36:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-12 19:36:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:36:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:02,480 INFO L225 Difference]: With dead ends: 6916 [2021-08-12 19:36:02,480 INFO L226 Difference]: Without dead ends: 6899 [2021-08-12 19:36:02,481 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2300.8ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-08-12 19:36:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-08-12 19:36:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4480. [2021-08-12 19:36:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 2.444965394061174) internal successors, (10951), 4479 states have internal predecessors, (10951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 10951 transitions. [2021-08-12 19:36:03,481 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 10951 transitions. Word has length 47 [2021-08-12 19:36:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:03,481 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 10951 transitions. [2021-08-12 19:36:03,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 10951 transitions. [2021-08-12 19:36:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:36:03,487 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:03,487 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:03,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-12 19:36:03,689 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:03,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 56 times [2021-08-12 19:36:03,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:03,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880941112] [2021-08-12 19:36:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:03,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:03,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880941112] [2021-08-12 19:36:03,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880941112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:03,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95059146] [2021-08-12 19:36:03,944 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 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 [2021-08-12 19:36:03,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:36:03,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:03,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:36:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:04,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95059146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:04,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:04,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-08-12 19:36:04,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220368583] [2021-08-12 19:36:04,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-08-12 19:36:04,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-12 19:36:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:36:04,438 INFO L87 Difference]: Start difference. First operand 4480 states and 10951 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:22,338 INFO L93 Difference]: Finished difference Result 10564 states and 24309 transitions. [2021-08-12 19:36:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-12 19:36:22,338 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:36:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:22,350 INFO L225 Difference]: With dead ends: 10564 [2021-08-12 19:36:22,351 INFO L226 Difference]: Without dead ends: 10501 [2021-08-12 19:36:22,352 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 3131.4ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-08-12 19:36:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-08-12 19:36:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 4420. [2021-08-12 19:36:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 2.4433129667345552) internal successors, (10797), 4419 states have internal predecessors, (10797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 10797 transitions. [2021-08-12 19:36:23,468 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 10797 transitions. Word has length 47 [2021-08-12 19:36:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:23,469 INFO L482 AbstractCegarLoop]: Abstraction has 4420 states and 10797 transitions. [2021-08-12 19:36:23,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 10797 transitions. [2021-08-12 19:36:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:36:23,472 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:23,473 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:23,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-12 19:36:23,674 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 57 times [2021-08-12 19:36:23,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:23,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320150491] [2021-08-12 19:36:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:23,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:23,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320150491] [2021-08-12 19:36:23,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320150491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:23,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951447774] [2021-08-12 19:36:23,850 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 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 [2021-08-12 19:36:23,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-12 19:36:23,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:36:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:24,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951447774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:24,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:24,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-08-12 19:36:24,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712412821] [2021-08-12 19:36:24,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 19:36:24,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 19:36:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:36:24,353 INFO L87 Difference]: Start difference. First operand 4420 states and 10797 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:47,556 INFO L93 Difference]: Finished difference Result 12117 states and 27632 transitions. [2021-08-12 19:36:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-08-12 19:36:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:36:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:47,571 INFO L225 Difference]: With dead ends: 12117 [2021-08-12 19:36:47,571 INFO L226 Difference]: Without dead ends: 12024 [2021-08-12 19:36:47,573 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 3102.2ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-08-12 19:36:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-08-12 19:36:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 4352. [2021-08-12 19:36:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 2.4474833371638702) internal successors, (10649), 4351 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 10649 transitions. [2021-08-12 19:36:48,793 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 10649 transitions. Word has length 47 [2021-08-12 19:36:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:48,793 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 10649 transitions. [2021-08-12 19:36:48,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 10649 transitions. [2021-08-12 19:36:48,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:36:48,797 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:48,797 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:49,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:49,000 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 58 times [2021-08-12 19:36:49,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:49,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010176362] [2021-08-12 19:36:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:49,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:49,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010176362] [2021-08-12 19:36:49,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010176362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:49,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45083665] [2021-08-12 19:36:49,214 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 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 [2021-08-12 19:36:49,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:36:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:49,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-12 19:36:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:49,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45083665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:49,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:49,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-08-12 19:36:49,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433970244] [2021-08-12 19:36:49,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:36:49,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:49,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:36:49,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:36:49,717 INFO L87 Difference]: Start difference. First operand 4352 states and 10649 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:19,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:19,414 INFO L93 Difference]: Finished difference Result 14436 states and 32986 transitions. [2021-08-12 19:37:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-12 19:37:19,415 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:37:19,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:19,433 INFO L225 Difference]: With dead ends: 14436 [2021-08-12 19:37:19,433 INFO L226 Difference]: Without dead ends: 14229 [2021-08-12 19:37:19,436 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 2425.2ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-08-12 19:37:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14229 states. [2021-08-12 19:37:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14229 to 4384. [2021-08-12 19:37:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4442162902121836) internal successors, (10713), 4383 states have internal predecessors, (10713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10713 transitions. [2021-08-12 19:37:20,778 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10713 transitions. Word has length 47 [2021-08-12 19:37:20,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:20,779 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 10713 transitions. [2021-08-12 19:37:20,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10713 transitions. [2021-08-12 19:37:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:37:20,782 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:20,782 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:20,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-08-12 19:37:20,983 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 59 times [2021-08-12 19:37:20,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:20,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108424061] [2021-08-12 19:37:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:21,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:21,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108424061] [2021-08-12 19:37:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108424061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:21,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707415620] [2021-08-12 19:37:21,176 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 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 [2021-08-12 19:37:21,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 19:37:21,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:37:21,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:37:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707415620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:21,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:21,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-08-12 19:37:21,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006694477] [2021-08-12 19:37:21,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-08-12 19:37:21,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:21,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-12 19:37:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:37:21,664 INFO L87 Difference]: Start difference. First operand 4384 states and 10713 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:56,533 INFO L93 Difference]: Finished difference Result 14235 states and 32390 transitions. [2021-08-12 19:37:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-08-12 19:37:56,540 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:37:56,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:56,559 INFO L225 Difference]: With dead ends: 14235 [2021-08-12 19:37:56,559 INFO L226 Difference]: Without dead ends: 13917 [2021-08-12 19:37:56,563 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 2863.0ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-08-12 19:37:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2021-08-12 19:37:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 4404. [2021-08-12 19:37:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.4421985010220304) internal successors, (10753), 4403 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 10753 transitions. [2021-08-12 19:37:58,040 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 10753 transitions. Word has length 47 [2021-08-12 19:37:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:58,041 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 10753 transitions. [2021-08-12 19:37:58,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 10753 transitions. [2021-08-12 19:37:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:37:58,044 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:58,044 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:58,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:37:58,244 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 60 times [2021-08-12 19:37:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:58,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585042688] [2021-08-12 19:37:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:58,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:58,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585042688] [2021-08-12 19:37:58,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585042688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:58,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809623979] [2021-08-12 19:37:58,451 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 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 [2021-08-12 19:37:58,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 19:37:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:37:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-12 19:37:58,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:58,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809623979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:58,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:58,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-12 19:37:58,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311060650] [2021-08-12 19:37:58,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-08-12 19:37:58,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:58,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-12 19:37:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:37:58,979 INFO L87 Difference]: Start difference. First operand 4404 states and 10753 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:31,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:38:31,919 INFO L93 Difference]: Finished difference Result 13626 states and 31518 transitions. [2021-08-12 19:38:31,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-12 19:38:31,920 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:38:31,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:38:31,938 INFO L225 Difference]: With dead ends: 13626 [2021-08-12 19:38:31,938 INFO L226 Difference]: Without dead ends: 13078 [2021-08-12 19:38:31,942 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8506 ImplicationChecksByTransitivity, 3118.3ms TimeCoverageRelationStatistics Valid=4891, Invalid=19289, Unknown=0, NotChecked=0, Total=24180 [2021-08-12 19:38:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-08-12 19:38:33,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 4605. [2021-08-12 19:38:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.386185925282363) internal successors, (10986), 4604 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 10986 transitions. [2021-08-12 19:38:33,675 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 10986 transitions. Word has length 47 [2021-08-12 19:38:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:38:33,675 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 10986 transitions. [2021-08-12 19:38:33,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 10986 transitions. [2021-08-12 19:38:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-12 19:38:33,679 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:38:33,679 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:38:33,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-08-12 19:38:33,879 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:38:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:38:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 61 times [2021-08-12 19:38:33,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:38:33,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702622022] [2021-08-12 19:38:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:38:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:34,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:38:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702622022] [2021-08-12 19:38:34,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702622022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893202063] [2021-08-12 19:38:34,001 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 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 [2021-08-12 19:38:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:34,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 19:38:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:38:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:34,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893202063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:34,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:38:34,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2021-08-12 19:38:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385415867] [2021-08-12 19:38:34,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-08-12 19:38:34,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:38:34,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-12 19:38:34,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:38:34,485 INFO L87 Difference]: Start difference. First operand 4605 states and 10986 transitions. Second operand has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:38:55,312 INFO L93 Difference]: Finished difference Result 9027 states and 20675 transitions. [2021-08-12 19:38:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-12 19:38:55,312 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-12 19:38:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:38:55,324 INFO L225 Difference]: With dead ends: 9027 [2021-08-12 19:38:55,325 INFO L226 Difference]: Without dead ends: 9010 [2021-08-12 19:38:55,326 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6196 ImplicationChecksByTransitivity, 2520.2ms TimeCoverageRelationStatistics Valid=3809, Invalid=13221, Unknown=0, NotChecked=0, Total=17030 [2021-08-12 19:38:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-08-12 19:38:57,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4724. [2021-08-12 19:38:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 2.4084268473427906) internal successors, (11375), 4723 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 11375 transitions. [2021-08-12 19:38:57,130 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 11375 transitions. Word has length 47 [2021-08-12 19:38:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:38:57,130 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 11375 transitions. [2021-08-12 19:38:57,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 11375 transitions. [2021-08-12 19:38:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-12 19:38:57,134 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:38:57,134 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:38:57,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:38:57,335 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:38:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:38:57,335 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 62 times [2021-08-12 19:38:57,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:38:57,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665132378] [2021-08-12 19:38:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:38:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:57,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:38:57,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665132378] [2021-08-12 19:38:57,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665132378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:57,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500769762] [2021-08-12 19:38:57,546 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 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 [2021-08-12 19:38:57,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:38:57,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:38:57,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-12 19:38:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:38:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:58,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500769762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:58,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:38:58,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-08-12 19:38:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655271785] [2021-08-12 19:38:58,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-08-12 19:38:58,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:38:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-12 19:38:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 19:38:58,107 INFO L87 Difference]: Start difference. First operand 4724 states and 11375 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:39:13,836 INFO L93 Difference]: Finished difference Result 6706 states and 15548 transitions. [2021-08-12 19:39:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-12 19:39:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-12 19:39:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:39:13,845 INFO L225 Difference]: With dead ends: 6706 [2021-08-12 19:39:13,845 INFO L226 Difference]: Without dead ends: 6421 [2021-08-12 19:39:13,847 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 3161.9ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-08-12 19:39:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-08-12 19:39:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4591. [2021-08-12 19:39:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 2.4004357298474948) internal successors, (11018), 4590 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 11018 transitions. [2021-08-12 19:39:15,531 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 11018 transitions. Word has length 49 [2021-08-12 19:39:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:39:15,532 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 11018 transitions. [2021-08-12 19:39:15,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 11018 transitions. [2021-08-12 19:39:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-12 19:39:15,535 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:39:15,535 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:39:15,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-08-12 19:39:15,737 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:39:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:39:15,737 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 63 times [2021-08-12 19:39:15,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:39:15,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022966071] [2021-08-12 19:39:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:39:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:39:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:15,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:39:15,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022966071] [2021-08-12 19:39:15,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022966071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:15,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591274318] [2021-08-12 19:39:15,857 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 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 [2021-08-12 19:39:15,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-12 19:39:15,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:39:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-12 19:39:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:39:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 17 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:16,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591274318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:16,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:39:16,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2021-08-12 19:39:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876558159] [2021-08-12 19:39:16,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-08-12 19:39:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:39:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-12 19:39:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:39:16,446 INFO L87 Difference]: Start difference. First operand 4591 states and 11018 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:39:43,298 INFO L93 Difference]: Finished difference Result 8267 states and 18657 transitions. [2021-08-12 19:39:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-08-12 19:39:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-12 19:39:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:39:43,309 INFO L225 Difference]: With dead ends: 8267 [2021-08-12 19:39:43,309 INFO L226 Difference]: Without dead ends: 8250 [2021-08-12 19:39:43,312 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19820 ImplicationChecksByTransitivity, 5193.8ms TimeCoverageRelationStatistics Valid=9481, Invalid=36529, Unknown=0, NotChecked=0, Total=46010 [2021-08-12 19:39:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-08-12 19:39:45,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 4599. [2021-08-12 19:39:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4598 states have (on average 2.4006089604175727) internal successors, (11038), 4598 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 11038 transitions. [2021-08-12 19:39:45,032 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 11038 transitions. Word has length 49 [2021-08-12 19:39:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:39:45,032 INFO L482 AbstractCegarLoop]: Abstraction has 4599 states and 11038 transitions. [2021-08-12 19:39:45,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 11038 transitions. [2021-08-12 19:39:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-12 19:39:45,036 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:39:45,036 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:39:45,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:39:45,237 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:39:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:39:45,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 64 times [2021-08-12 19:39:45,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:39:45,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427028444] [2021-08-12 19:39:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:39:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:39:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:45,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:39:45,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427028444] [2021-08-12 19:39:45,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427028444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:45,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419302994] [2021-08-12 19:39:45,366 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 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 [2021-08-12 19:39:45,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:39:45,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:39:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-12 19:39:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:39:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:45,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419302994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:45,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:39:45,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-12 19:39:45,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087283256] [2021-08-12 19:39:45,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:39:45,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:39:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:39:45,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:39:45,472 INFO L87 Difference]: Start difference. First operand 4599 states and 11038 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:39:52,536 INFO L93 Difference]: Finished difference Result 5891 states and 14055 transitions. [2021-08-12 19:39:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:39:52,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-12 19:39:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:39:52,547 INFO L225 Difference]: With dead ends: 5891 [2021-08-12 19:39:52,548 INFO L226 Difference]: Without dead ends: 5820 [2021-08-12 19:39:52,548 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:39:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-08-12 19:39:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5433. [2021-08-12 19:39:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.43740795287187) internal successors, (13240), 5432 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 13240 transitions. [2021-08-12 19:39:54,668 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 13240 transitions. Word has length 51 [2021-08-12 19:39:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:39:54,668 INFO L482 AbstractCegarLoop]: Abstraction has 5433 states and 13240 transitions. [2021-08-12 19:39:54,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 13240 transitions. [2021-08-12 19:39:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-12 19:39:54,673 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:39:54,673 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:39:54,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-12 19:39:54,874 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:39:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:39:54,874 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 65 times [2021-08-12 19:39:54,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:39:54,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185505007] [2021-08-12 19:39:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:39:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:39:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:55,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:39:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185505007] [2021-08-12 19:39:55,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185505007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344004946] [2021-08-12 19:39:55,178 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 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 [2021-08-12 19:39:55,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-12 19:39:55,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:39:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-12 19:39:55,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:39:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:55,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344004946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:55,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:39:55,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-08-12 19:39:55,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594738424] [2021-08-12 19:39:55,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-08-12 19:39:55,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:39:55,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-12 19:39:55,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:39:55,860 INFO L87 Difference]: Start difference. First operand 5433 states and 13240 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:10,780 INFO L93 Difference]: Finished difference Result 7113 states and 16846 transitions. [2021-08-12 19:40:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-12 19:40:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-12 19:40:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:10,792 INFO L225 Difference]: With dead ends: 7113 [2021-08-12 19:40:10,792 INFO L226 Difference]: Without dead ends: 7088 [2021-08-12 19:40:10,793 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2851.4ms TimeCoverageRelationStatistics Valid=1100, Invalid=12706, Unknown=0, NotChecked=0, Total=13806 [2021-08-12 19:40:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-08-12 19:40:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 5314. [2021-08-12 19:40:13,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 5313 states have (on average 2.43553547901374) internal successors, (12940), 5313 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 12940 transitions. [2021-08-12 19:40:13,172 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 12940 transitions. Word has length 51 [2021-08-12 19:40:13,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:13,172 INFO L482 AbstractCegarLoop]: Abstraction has 5314 states and 12940 transitions. [2021-08-12 19:40:13,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 12940 transitions. [2021-08-12 19:40:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-12 19:40:13,177 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:13,177 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:13,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-12 19:40:13,378 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:13,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:13,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 66 times [2021-08-12 19:40:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:13,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952309537] [2021-08-12 19:40:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:13,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:13,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952309537] [2021-08-12 19:40:13,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952309537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:13,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169489239] [2021-08-12 19:40:13,579 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 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 [2021-08-12 19:40:13,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-12 19:40:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:40:13,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-12 19:40:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:14,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169489239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:14,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:14,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-08-12 19:40:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475875486] [2021-08-12 19:40:14,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:40:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:40:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:40:14,199 INFO L87 Difference]: Start difference. First operand 5314 states and 12940 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:38,564 INFO L93 Difference]: Finished difference Result 10602 states and 24403 transitions. [2021-08-12 19:40:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-08-12 19:40:38,565 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-12 19:40:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:38,579 INFO L225 Difference]: With dead ends: 10602 [2021-08-12 19:40:38,580 INFO L226 Difference]: Without dead ends: 10561 [2021-08-12 19:40:38,582 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 3146.6ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-08-12 19:40:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. Received shutdown request... [2021-08-12 19:40:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 5782. [2021-08-12 19:40:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5782 states, 5781 states have (on average 2.44075419477599) internal successors, (14110), 5781 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:41,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-08-12 19:40:41,073 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:40:41,076 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:40:41,077 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:40:41,078 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:40:41 BasicIcfg [2021-08-12 19:40:41,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:40:41,078 INFO L168 Benchmark]: Toolchain (without parser) took 543700.45 ms. Allocated memory was 198.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 178.0 MB in the beginning and 797.0 MB in the end (delta: -618.9 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-12 19:40:41,078 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 198.2 MB. Free memory is still 179.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:40:41,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.16 ms. Allocated memory is still 198.2 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:40:41,079 INFO L168 Benchmark]: Boogie Preprocessor took 12.25 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.6 MB in the end (delta: 995.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:40:41,079 INFO L168 Benchmark]: RCFGBuilder took 201.18 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 164.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-12 19:40:41,079 INFO L168 Benchmark]: TraceAbstraction took 543463.21 ms. Allocated memory was 198.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 163.9 MB in the beginning and 797.0 MB in the end (delta: -633.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-12 19:40:41,079 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 198.2 MB. Free memory is still 179.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.16 ms. Allocated memory is still 198.2 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.25 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.6 MB in the end (delta: 995.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 201.18 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 164.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 543463.21 ms. Allocated memory was 198.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 163.9 MB in the beginning and 797.0 MB in the end (delta: -633.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 543387.1ms, OverallIterations: 68, TraceHistogramMax: 9, EmptinessCheckTime: 145.7ms, AutomataDifference: 463075.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3055 SDtfs, 22695 SDslu, 38168 SDs, 0 SdLazy, 82907 SolverSat, 6412 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31042.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7147 GetRequests, 1755 SyntacticMatches, 40 SemanticMatches, 5352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203501 ImplicationChecksByTransitivity, 100370.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5433occurred in iteration=66, InterpolantAutomatonStates: 4056, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32694.8ms AutomataMinimizationTime, 68 MinimizatonAttempts, 128509 StatesRemovedByMinimization, 67 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 269.7ms SsaConstructionTime, 1194.0ms SatisfiabilityAnalysisTime, 30322.6ms InterpolantComputationTime, 4940 NumberOfCodeBlocks, 4940 NumberOfCodeBlocksAsserted, 377 NumberOfCheckSat, 4806 ConstructedInterpolants, 0 QuantifiedInterpolants, 40849 SizeOfPredicates, 239 NumberOfNonLiveVariables, 5574 ConjunctsInSsa, 1875 ConjunctsInUnsatCore, 134 InterpolantComputations, 2 PerfectInterpolantSequences, 1654/9449 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown