/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:39:28,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:39:28,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:39:28,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:39:28,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:39:28,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:39:28,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:39:28,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:39:28,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:39:28,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:39:28,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:39:28,373 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:39:28,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:39:28,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:39:28,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:39:28,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:39:28,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:39:28,376 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:39:28,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:39:28,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:39:28,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:39:28,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:39:28,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:39:28,664 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:39:28,666 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:39:28,666 INFO L432 ainManager$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 [2021-06-05 05:39:28,667 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-06-05 05:39:28,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:39:28,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:39:28,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:39:28,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:39:28,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:39:28,710 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 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,715 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 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:39:28,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:39:28,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:39:28,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:39:28,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... [2021-06-05 05:39:28,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:39:28,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:39:28,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:39:28,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:39:28,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:39:28,801 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:39:28,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:39:28,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:39:28,802 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:39:28,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:39:28,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:39:28,802 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:39:28,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:39:28,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:39:28,803 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:39:28,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:39:28,926 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:39:28,928 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:39:28 BoogieIcfgContainer [2021-06-05 05:39:28,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:39:28,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:39:28,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:39:28,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:39:28,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:39:28" (1/2) ... [2021-06-05 05:39:28,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a53a001 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:39:28, skipping insertion in model container [2021-06-05 05:39:28,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:39:28" (2/2) ... [2021-06-05 05:39:28,933 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-06-05 05:39:28,936 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:39:28,936 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:39:28,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:39:28,937 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:39:28,956 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:39:28,970 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:39:28,983 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:39:28,983 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:39:28,983 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:39:28,983 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:39:28,983 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:39:28,983 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:39:28,983 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:39:28,984 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:39:28,989 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 05:39:28,996 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) [2021-06-05 05:39:29,004 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) [2021-06-05 05:39:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:39:29,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:29,009 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:29,010 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-06-05 05:39:29,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:29,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610527999] [2021-06-05 05:39:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:29,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:29,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610527999] [2021-06-05 05:39:29,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610527999] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:39:29,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:39:29,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:39:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574964638] [2021-06-05 05:39:29,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:39:29,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:39:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:39:29,186 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) [2021-06-05 05:39:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:29,230 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-05 05:39:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:39:29,231 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 [2021-06-05 05:39:29,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:29,239 INFO L225 Difference]: With dead ends: 43 [2021-06-05 05:39:29,240 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 05:39:29,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:39:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 05:39:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-05 05:39:29,272 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) [2021-06-05 05:39:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-05 05:39:29,274 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-05 05:39:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:29,275 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-05 05:39:29,275 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) [2021-06-05 05:39:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-05 05:39:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:39:29,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:29,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:29,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:39:29,277 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:29,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-06-05 05:39:29,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:29,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801375284] [2021-06-05 05:39:29,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:39:29,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:29,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801375284] [2021-06-05 05:39:29,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801375284] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:39:29,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:39:29,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:39:29,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662286677] [2021-06-05 05:39:29,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:39:29,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:29,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:39:29,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:39:29,377 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) [2021-06-05 05:39:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:29,417 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-05 05:39:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:39:29,418 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 [2021-06-05 05:39:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:29,420 INFO L225 Difference]: With dead ends: 50 [2021-06-05 05:39:29,420 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 05:39:29,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:39:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 05:39:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-05 05:39:29,431 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) [2021-06-05 05:39:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-05 05:39:29,434 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-05 05:39:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:29,434 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-05 05:39:29,434 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) [2021-06-05 05:39:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-05 05:39:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:39:29,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:29,435 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:29,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:39:29,435 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-06-05 05:39:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:29,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749600708] [2021-06-05 05:39:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:29,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749600708] [2021-06-05 05:39:29,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749600708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:29,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794413340] [2021-06-05 05:39:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:29,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:39:29,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:29,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794413340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:29,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:29,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 05:39:29,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870175232] [2021-06-05 05:39:29,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:39:29,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:39:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:39:29,676 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) [2021-06-05 05:39:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:29,693 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-06-05 05:39:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:39:29,693 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 [2021-06-05 05:39:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:29,694 INFO L225 Difference]: With dead ends: 99 [2021-06-05 05:39:29,694 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 05:39:29,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:39:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 05:39:29,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-06-05 05:39:29,698 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) [2021-06-05 05:39:29,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-06-05 05:39:29,701 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-06-05 05:39:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:29,701 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-06-05 05:39:29,701 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) [2021-06-05 05:39:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-06-05 05:39:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:39:29,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:29,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:29,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:39:29,917 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-06-05 05:39:29,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:29,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812434566] [2021-06-05 05:39:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:29,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:29,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812434566] [2021-06-05 05:39:29,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812434566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:29,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861170152] [2021-06-05 05:39:29,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:29,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:29,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:39:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861170152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:30,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 05:39:30,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994874949] [2021-06-05 05:39:30,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:39:30,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:30,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:39:30,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:30,053 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) [2021-06-05 05:39:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:30,074 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-06-05 05:39:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:39:30,074 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 [2021-06-05 05:39:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:30,075 INFO L225 Difference]: With dead ends: 80 [2021-06-05 05:39:30,075 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 05:39:30,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 05:39:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-06-05 05:39:30,079 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) [2021-06-05 05:39:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-05 05:39:30,079 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-06-05 05:39:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:30,079 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-05 05:39:30,080 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) [2021-06-05 05:39:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-05 05:39:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:39:30,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:30,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:30,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:30,297 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:30,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-06-05 05:39:30,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:30,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837971468] [2021-06-05 05:39:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:30,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837971468] [2021-06-05 05:39:30,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837971468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332778181] [2021-06-05 05:39:30,381 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 [2021-06-05 05:39:30,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:39:30,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:39:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:30,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332778181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:30,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:30,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 05:39:30,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45787364] [2021-06-05 05:39:30,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:39:30,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:39:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:39:30,612 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) [2021-06-05 05:39:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:30,879 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-06-05 05:39:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:39:30,881 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 [2021-06-05 05:39:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:30,882 INFO L225 Difference]: With dead ends: 198 [2021-06-05 05:39:30,882 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 05:39:30,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 05:39:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-06-05 05:39:30,890 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) [2021-06-05 05:39:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-06-05 05:39:30,892 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-06-05 05:39:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:30,892 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-06-05 05:39:30,892 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) [2021-06-05 05:39:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-06-05 05:39:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:39:30,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:30,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:31,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:31,105 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-06-05 05:39:31,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:31,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513836635] [2021-06-05 05:39:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:31,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:31,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513836635] [2021-06-05 05:39:31,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513836635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:31,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796095431] [2021-06-05 05:39:31,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:31,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:31,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:39:31,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796095431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:31,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:31,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 05:39:31,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157789923] [2021-06-05 05:39:31,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:39:31,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:39:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:39:31,296 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) [2021-06-05 05:39:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:31,587 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-06-05 05:39:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:39:31,588 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 [2021-06-05 05:39:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:31,590 INFO L225 Difference]: With dead ends: 170 [2021-06-05 05:39:31,590 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 05:39:31,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:39:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 05:39:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-06-05 05:39:31,609 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) [2021-06-05 05:39:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-06-05 05:39:31,609 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-06-05 05:39:31,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:31,609 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-06-05 05:39:31,610 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) [2021-06-05 05:39:31,610 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-06-05 05:39:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:31,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:31,610 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:31,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:31,827 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-06-05 05:39:31,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:31,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930943199] [2021-06-05 05:39:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:31,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930943199] [2021-06-05 05:39:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930943199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336849092] [2021-06-05 05:39:31,891 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 [2021-06-05 05:39:31,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:39:31,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:31,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 05:39:31,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:31,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336849092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:31,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:31,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:39:31,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137116247] [2021-06-05 05:39:31,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:39:31,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:31,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:39:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:39:31,974 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) [2021-06-05 05:39:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:31,995 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-06-05 05:39:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:39:31,995 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 [2021-06-05 05:39:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:31,996 INFO L225 Difference]: With dead ends: 190 [2021-06-05 05:39:31,996 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 05:39:31,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:39:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 05:39:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-06-05 05:39:32,000 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) [2021-06-05 05:39:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-06-05 05:39:32,001 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-06-05 05:39:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:32,001 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-06-05 05:39:32,001 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) [2021-06-05 05:39:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-06-05 05:39:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:32,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:32,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:32,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:32,221 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:32,221 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-06-05 05:39:32,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:32,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253735129] [2021-06-05 05:39:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:32,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:32,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253735129] [2021-06-05 05:39:32,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253735129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:32,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075315031] [2021-06-05 05:39:32,336 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 [2021-06-05 05:39:32,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:39:32,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:32,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:39:32,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:32,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075315031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:32,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:32,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 05:39:32,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185393949] [2021-06-05 05:39:32,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:39:32,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:39:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:39:32,541 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) [2021-06-05 05:39:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:32,970 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-06-05 05:39:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:39:32,971 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 [2021-06-05 05:39:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:32,972 INFO L225 Difference]: With dead ends: 320 [2021-06-05 05:39:32,972 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 05:39:32,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:39:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 05:39:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-06-05 05:39:32,977 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) [2021-06-05 05:39:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-06-05 05:39:32,978 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-06-05 05:39:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:32,978 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-06-05 05:39:32,978 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) [2021-06-05 05:39:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-06-05 05:39:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:39:32,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:32,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:33,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:33,197 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:33,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-06-05 05:39:33,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:33,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343113730] [2021-06-05 05:39:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:33,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:33,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343113730] [2021-06-05 05:39:33,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343113730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:33,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588034963] [2021-06-05 05:39:33,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:39:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:39:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:33,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588034963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:33,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:33,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 05:39:33,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232524108] [2021-06-05 05:39:33,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:39:33,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:39:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:33,423 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) [2021-06-05 05:39:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:33,713 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-06-05 05:39:33,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:39:33,713 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 [2021-06-05 05:39:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:33,715 INFO L225 Difference]: With dead ends: 321 [2021-06-05 05:39:33,715 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 05:39:33,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:39:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 05:39:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-06-05 05:39:33,721 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) [2021-06-05 05:39:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-06-05 05:39:33,722 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-06-05 05:39:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:33,722 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-06-05 05:39:33,722 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) [2021-06-05 05:39:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-06-05 05:39:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:33,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:33,727 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:33,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:39:33,943 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-06-05 05:39:33,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:33,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838193915] [2021-06-05 05:39:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:34,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:34,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838193915] [2021-06-05 05:39:34,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838193915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:34,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502520454] [2021-06-05 05:39:34,019 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 [2021-06-05 05:39:34,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:34,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:39:34,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:34,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502520454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:34,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:34,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 05:39:34,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631149067] [2021-06-05 05:39:34,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:39:34,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:39:34,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:39:34,214 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) [2021-06-05 05:39:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:34,735 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-06-05 05:39:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:39:34,735 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 [2021-06-05 05:39:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:34,737 INFO L225 Difference]: With dead ends: 435 [2021-06-05 05:39:34,737 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 05:39:34,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:39:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 05:39:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-06-05 05:39:34,742 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) [2021-06-05 05:39:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-06-05 05:39:34,742 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-06-05 05:39:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:34,742 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-06-05 05:39:34,742 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) [2021-06-05 05:39:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-06-05 05:39:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:39:34,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:34,743 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:34,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 05:39:34,957 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-06-05 05:39:34,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:34,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603065831] [2021-06-05 05:39:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:34,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603065831] [2021-06-05 05:39:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603065831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840261876] [2021-06-05 05:39:34,998 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 [2021-06-05 05:39:35,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:39:35,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:35,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:39:35,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:35,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840261876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:35,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:35,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-05 05:39:35,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359862503] [2021-06-05 05:39:35,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:39:35,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:39:35,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:39:35,162 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) [2021-06-05 05:39:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:35,637 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-06-05 05:39:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:39:35,637 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 [2021-06-05 05:39:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:35,638 INFO L225 Difference]: With dead ends: 340 [2021-06-05 05:39:35,638 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 05:39:35,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:39:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 05:39:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-06-05 05:39:35,642 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) [2021-06-05 05:39:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-06-05 05:39:35,643 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-06-05 05:39:35,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:35,643 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-06-05 05:39:35,643 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) [2021-06-05 05:39:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-06-05 05:39:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:35,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:35,643 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:35,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:35,862 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:35,862 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-06-05 05:39:35,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:35,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758913287] [2021-06-05 05:39:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:35,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:35,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758913287] [2021-06-05 05:39:35,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758913287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:35,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537668605] [2021-06-05 05:39:35,913 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 [2021-06-05 05:39:35,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:35,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:35,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:39:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:36,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537668605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:36,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:36,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 05:39:36,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465488939] [2021-06-05 05:39:36,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:39:36,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:39:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:36,014 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) [2021-06-05 05:39:36,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:36,041 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-06-05 05:39:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:39:36,041 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 [2021-06-05 05:39:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:36,042 INFO L225 Difference]: With dead ends: 354 [2021-06-05 05:39:36,042 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:39:36,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:39:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:39:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-06-05 05:39:36,047 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) [2021-06-05 05:39:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-06-05 05:39:36,047 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-06-05 05:39:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:36,047 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-06-05 05:39:36,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:39:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-06-05 05:39:36,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:36,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:36,048 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:36,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:36,264 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:36,265 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-06-05 05:39:36,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:36,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622348788] [2021-06-05 05:39:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:36,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:36,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622348788] [2021-06-05 05:39:36,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622348788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:36,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349779526] [2021-06-05 05:39:36,377 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 [2021-06-05 05:39:36,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:39:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:36,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:36,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:36,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349779526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:36,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:36,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 05:39:36,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828886353] [2021-06-05 05:39:36,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:39:36,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:39:36,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:39:36,606 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) [2021-06-05 05:39:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:37,361 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-06-05 05:39:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:39:37,362 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 [2021-06-05 05:39:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:37,363 INFO L225 Difference]: With dead ends: 559 [2021-06-05 05:39:37,363 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 05:39:37,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:39:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 05:39:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-06-05 05:39:37,370 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) [2021-06-05 05:39:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-06-05 05:39:37,370 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-06-05 05:39:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:37,371 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-06-05 05:39:37,371 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) [2021-06-05 05:39:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-06-05 05:39:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:37,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:37,371 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:37,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:39:37,578 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-06-05 05:39:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:37,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113402724] [2021-06-05 05:39:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:37,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:37,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113402724] [2021-06-05 05:39:37,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113402724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:37,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028220701] [2021-06-05 05:39:37,690 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 [2021-06-05 05:39:37,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:39:37,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:39:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:37,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028220701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:37,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:37,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 05:39:37,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398940642] [2021-06-05 05:39:37,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:39:37,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:39:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:39:37,936 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) [2021-06-05 05:39:38,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:38,593 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-06-05 05:39:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:39:38,594 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 [2021-06-05 05:39:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:38,597 INFO L225 Difference]: With dead ends: 976 [2021-06-05 05:39:38,597 INFO L226 Difference]: Without dead ends: 940 [2021-06-05 05:39:38,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:39:38,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-05 05:39:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-06-05 05:39:38,606 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) [2021-06-05 05:39:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-06-05 05:39:38,607 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-06-05 05:39:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:38,607 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-06-05 05:39:38,607 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) [2021-06-05 05:39:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-06-05 05:39:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:39:38,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:38,608 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:38,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:39:38,808 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:38,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-06-05 05:39:38,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:38,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437255877] [2021-06-05 05:39:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:38,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:38,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437255877] [2021-06-05 05:39:38,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437255877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:38,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877838007] [2021-06-05 05:39:38,878 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 [2021-06-05 05:39:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:38,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:39:38,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:39,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877838007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:39,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:39,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 05:39:39,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079322602] [2021-06-05 05:39:39,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:39:39,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:39,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:39:39,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:39:39,083 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) [2021-06-05 05:39:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:39,791 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-06-05 05:39:39,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:39:39,791 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 [2021-06-05 05:39:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:39,794 INFO L225 Difference]: With dead ends: 802 [2021-06-05 05:39:39,794 INFO L226 Difference]: Without dead ends: 794 [2021-06-05 05:39:39,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:39:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-06-05 05:39:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-06-05 05:39:39,803 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) [2021-06-05 05:39:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-06-05 05:39:39,803 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-06-05 05:39:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:39,804 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-06-05 05:39:39,804 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) [2021-06-05 05:39:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-06-05 05:39:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:39,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:39,804 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:40,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:39:40,017 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:40,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-06-05 05:39:40,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998174314] [2021-06-05 05:39:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:40,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:40,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998174314] [2021-06-05 05:39:40,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998174314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:40,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291637141] [2021-06-05 05:39:40,122 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 [2021-06-05 05:39:40,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:40,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:40,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:39:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:40,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291637141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:40,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:40,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 05:39:40,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266305437] [2021-06-05 05:39:40,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:39:40,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:39:40,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:39:40,389 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) [2021-06-05 05:39:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:41,170 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-06-05 05:39:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:39:41,170 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 [2021-06-05 05:39:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:41,172 INFO L225 Difference]: With dead ends: 680 [2021-06-05 05:39:41,172 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 05:39:41,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 698.3ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:39:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 05:39:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-06-05 05:39:41,179 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) [2021-06-05 05:39:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-06-05 05:39:41,180 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-06-05 05:39:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:41,180 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-06-05 05:39:41,180 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) [2021-06-05 05:39:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-06-05 05:39:41,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:39:41,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:41,181 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:41,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:41,400 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-06-05 05:39:41,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:41,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886980543] [2021-06-05 05:39:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:41,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886980543] [2021-06-05 05:39:41,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886980543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875472693] [2021-06-05 05:39:41,447 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 [2021-06-05 05:39:41,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:39:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:39:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:41,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875472693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:41,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:41,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-05 05:39:41,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689307291] [2021-06-05 05:39:41,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:39:41,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:41,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:39:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:39:41,639 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) [2021-06-05 05:39:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:42,265 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-06-05 05:39:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:39:42,265 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 [2021-06-05 05:39:42,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:42,267 INFO L225 Difference]: With dead ends: 520 [2021-06-05 05:39:42,267 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 05:39:42,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 611.8ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:39:42,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 05:39:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-06-05 05:39:42,272 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) [2021-06-05 05:39:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-06-05 05:39:42,272 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-06-05 05:39:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:42,272 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-06-05 05:39:42,272 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) [2021-06-05 05:39:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-06-05 05:39:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:42,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:42,273 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:42,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:42,490 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:42,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-06-05 05:39:42,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:42,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088224261] [2021-06-05 05:39:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:42,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:42,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088224261] [2021-06-05 05:39:42,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088224261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:42,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252191292] [2021-06-05 05:39:42,551 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 [2021-06-05 05:39:42,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:42,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:42,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:42,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:42,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252191292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:42,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:42,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 05:39:42,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732410389] [2021-06-05 05:39:42,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:39:42,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:42,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:39:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:42,620 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) [2021-06-05 05:39:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:42,656 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-06-05 05:39:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:39:42,656 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 [2021-06-05 05:39:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:42,658 INFO L225 Difference]: With dead ends: 492 [2021-06-05 05:39:42,658 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 05:39:42,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:39:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 05:39:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-06-05 05:39:42,662 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) [2021-06-05 05:39:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-06-05 05:39:42,663 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-06-05 05:39:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:42,663 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-06-05 05:39:42,663 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) [2021-06-05 05:39:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-06-05 05:39:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:42,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:42,664 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:42,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:42,880 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-06-05 05:39:42,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:42,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003175814] [2021-06-05 05:39:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:43,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:43,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003175814] [2021-06-05 05:39:43,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003175814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:43,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353054290] [2021-06-05 05:39:43,030 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 [2021-06-05 05:39:43,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:39:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:39:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:43,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353054290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:43,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:43,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 05:39:43,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534915763] [2021-06-05 05:39:43,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:39:43,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:43,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:39:43,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:39:43,332 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) [2021-06-05 05:39:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:44,329 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-06-05 05:39:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:39:44,330 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 [2021-06-05 05:39:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:44,332 INFO L225 Difference]: With dead ends: 772 [2021-06-05 05:39:44,332 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 05:39:44,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 873.0ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:39:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 05:39:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-06-05 05:39:44,339 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) [2021-06-05 05:39:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-06-05 05:39:44,340 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-06-05 05:39:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:44,340 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-06-05 05:39:44,340 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) [2021-06-05 05:39:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-06-05 05:39:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:44,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:44,341 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:44,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:39:44,557 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-06-05 05:39:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:44,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124867320] [2021-06-05 05:39:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:44,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:44,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124867320] [2021-06-05 05:39:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124867320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:44,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579473203] [2021-06-05 05:39:44,696 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 [2021-06-05 05:39:44,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:39:44,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:44,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579473203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:44,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:44,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 05:39:44,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343319190] [2021-06-05 05:39:44,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:39:44,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:44,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:39:44,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:39:44,988 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) [2021-06-05 05:39:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:46,080 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-06-05 05:39:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:39:46,080 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 [2021-06-05 05:39:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:46,084 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 05:39:46,084 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 05:39:46,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 901.4ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:39:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 05:39:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-06-05 05:39:46,094 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) [2021-06-05 05:39:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-06-05 05:39:46,095 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-06-05 05:39:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:46,095 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-06-05 05:39:46,095 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) [2021-06-05 05:39:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-06-05 05:39:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:46,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:46,096 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:46,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:39:46,309 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-06-05 05:39:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:46,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453181945] [2021-06-05 05:39:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:46,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:46,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453181945] [2021-06-05 05:39:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453181945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:46,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431560638] [2021-06-05 05:39:46,399 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 [2021-06-05 05:39:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:46,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:46,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431560638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:46,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:46,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-05 05:39:46,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634038758] [2021-06-05 05:39:46,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:39:46,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:46,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:39:46,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:39:46,661 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) [2021-06-05 05:39:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:47,683 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-06-05 05:39:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:39:47,683 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 [2021-06-05 05:39:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:47,686 INFO L225 Difference]: With dead ends: 1094 [2021-06-05 05:39:47,686 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 05:39:47,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 869.5ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:39:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 05:39:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-06-05 05:39:47,698 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) [2021-06-05 05:39:47,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-06-05 05:39:47,699 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-06-05 05:39:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:47,699 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-06-05 05:39:47,699 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) [2021-06-05 05:39:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-06-05 05:39:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:47,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:47,701 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:47,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:39:47,917 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-06-05 05:39:47,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:47,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216697789] [2021-06-05 05:39:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:48,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216697789] [2021-06-05 05:39:48,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216697789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901957899] [2021-06-05 05:39:48,022 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 [2021-06-05 05:39:48,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:48,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:48,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:39:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901957899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:48,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:48,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 05:39:48,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320849531] [2021-06-05 05:39:48,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:39:48,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:39:48,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:39:48,275 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) [2021-06-05 05:39:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:49,121 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-06-05 05:39:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:39:49,121 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 [2021-06-05 05:39:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:49,126 INFO L225 Difference]: With dead ends: 1727 [2021-06-05 05:39:49,126 INFO L226 Difference]: Without dead ends: 1631 [2021-06-05 05:39:49,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:39:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-05 05:39:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-06-05 05:39:49,153 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) [2021-06-05 05:39:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-06-05 05:39:49,154 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-06-05 05:39:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:49,154 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-06-05 05:39:49,154 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) [2021-06-05 05:39:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-06-05 05:39:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:39:49,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:49,155 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:49,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:39:49,365 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-06-05 05:39:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:49,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372443034] [2021-06-05 05:39:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:49,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:49,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372443034] [2021-06-05 05:39:49,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372443034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:49,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336021488] [2021-06-05 05:39:49,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:49,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:39:49,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:49,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:39:49,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:49,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336021488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:49,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:49,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 05:39:49,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303369740] [2021-06-05 05:39:49,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:39:49,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:49,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:39:49,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:39:49,696 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) [2021-06-05 05:39:50,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:50,702 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-06-05 05:39:50,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:39:50,702 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 [2021-06-05 05:39:50,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:50,705 INFO L225 Difference]: With dead ends: 1314 [2021-06-05 05:39:50,706 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 05:39:50,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 934.3ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:39:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 05:39:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-06-05 05:39:50,715 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) [2021-06-05 05:39:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-06-05 05:39:50,716 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-06-05 05:39:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:50,717 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-06-05 05:39:50,718 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) [2021-06-05 05:39:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-06-05 05:39:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:39:50,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:50,719 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:50,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:50,935 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:50,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-06-05 05:39:50,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:50,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364764181] [2021-06-05 05:39:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:51,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:51,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364764181] [2021-06-05 05:39:51,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364764181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:51,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549448408] [2021-06-05 05:39:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:51,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:39:51,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 05:39:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:51,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549448408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:51,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:51,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 05:39:51,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120514658] [2021-06-05 05:39:51,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:39:51,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:51,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:39:51,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:39:51,327 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) [2021-06-05 05:39:52,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:52,331 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-06-05 05:39:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:39:52,331 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 [2021-06-05 05:39:52,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:52,334 INFO L225 Difference]: With dead ends: 1171 [2021-06-05 05:39:52,334 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 05:39:52,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 927.9ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:39:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 05:39:52,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-06-05 05:39:52,343 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) [2021-06-05 05:39:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-06-05 05:39:52,344 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-06-05 05:39:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:52,344 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-06-05 05:39:52,344 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) [2021-06-05 05:39:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-06-05 05:39:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:39:52,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:52,345 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:52,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:52,561 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-06-05 05:39:52,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:52,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945433498] [2021-06-05 05:39:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:52,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:52,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945433498] [2021-06-05 05:39:52,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945433498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:52,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37322842] [2021-06-05 05:39:52,617 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 [2021-06-05 05:39:52,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:39:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:39:52,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37322842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:52,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:52,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-05 05:39:52,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392293638] [2021-06-05 05:39:52,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:39:52,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:39:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:39:52,890 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) [2021-06-05 05:39:53,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:53,879 INFO L93 Difference]: Finished difference Result 940 states and 2022 transitions. [2021-06-05 05:39:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:39:53,880 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 [2021-06-05 05:39:53,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:53,882 INFO L225 Difference]: With dead ends: 940 [2021-06-05 05:39:53,882 INFO L226 Difference]: Without dead ends: 936 [2021-06-05 05:39:53,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 962.6ms TimeCoverageRelationStatistics Valid=1104, Invalid=3452, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:39:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-05 05:39:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 572. [2021-06-05 05:39:53,890 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) [2021-06-05 05:39:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-06-05 05:39:53,891 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-06-05 05:39:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:53,891 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-06-05 05:39:53,891 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) [2021-06-05 05:39:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-06-05 05:39:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:39:53,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:53,892 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:54,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:39:54,106 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-06-05 05:39:54,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:54,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990793390] [2021-06-05 05:39:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:54,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:54,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990793390] [2021-06-05 05:39:54,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990793390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:54,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948037051] [2021-06-05 05:39:54,187 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 [2021-06-05 05:39:54,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:39:54,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:54,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:39:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:54,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948037051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:54,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:54,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-06-05 05:39:54,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759470708] [2021-06-05 05:39:54,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:39:54,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:39:54,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:39:54,324 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) [2021-06-05 05:39:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:54,440 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-06-05 05:39:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:39:54,441 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 [2021-06-05 05:39:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:54,443 INFO L225 Difference]: With dead ends: 950 [2021-06-05 05:39:54,443 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 05:39:54,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:39:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 05:39:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-06-05 05:39:54,452 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) [2021-06-05 05:39:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-06-05 05:39:54,453 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-06-05 05:39:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:54,453 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-06-05 05:39:54,453 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) [2021-06-05 05:39:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-06-05 05:39:54,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:39:54,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:54,454 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:54,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:54,669 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 25 times [2021-06-05 05:39:54,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:54,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625246912] [2021-06-05 05:39:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:54,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:54,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625246912] [2021-06-05 05:39:54,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625246912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:54,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795424950] [2021-06-05 05:39:54,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:39:54,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:55,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795424950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:55,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:55,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 05:39:55,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958442027] [2021-06-05 05:39:55,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:39:55,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:55,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:39:55,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:39:55,138 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) [2021-06-05 05:39:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:56,686 INFO L93 Difference]: Finished difference Result 2174 states and 4585 transitions. [2021-06-05 05:39:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:39:56,686 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 [2021-06-05 05:39:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:56,692 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 05:39:56,692 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 05:39:56,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1234.8ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:39:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 05:39:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 800. [2021-06-05 05:39:56,707 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) [2021-06-05 05:39:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1887 transitions. [2021-06-05 05:39:56,708 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1887 transitions. Word has length 35 [2021-06-05 05:39:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:56,708 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1887 transitions. [2021-06-05 05:39:56,708 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) [2021-06-05 05:39:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1887 transitions. [2021-06-05 05:39:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:39:56,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:56,709 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:56,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:39:56,925 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 26 times [2021-06-05 05:39:56,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:56,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842924081] [2021-06-05 05:39:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:57,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842924081] [2021-06-05 05:39:57,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842924081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:57,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447695180] [2021-06-05 05:39:57,020 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 [2021-06-05 05:39:57,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:39:57,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:57,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:39:57,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:57,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447695180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:57,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:57,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 05:39:57,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591430638] [2021-06-05 05:39:57,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:39:57,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:57,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:39:57,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:39:57,337 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) [2021-06-05 05:39:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:39:58,754 INFO L93 Difference]: Finished difference Result 1787 states and 3872 transitions. [2021-06-05 05:39:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:39:58,757 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 [2021-06-05 05:39:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:39:58,762 INFO L225 Difference]: With dead ends: 1787 [2021-06-05 05:39:58,762 INFO L226 Difference]: Without dead ends: 1783 [2021-06-05 05:39:58,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1115.5ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:39:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-06-05 05:39:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 712. [2021-06-05 05:39:58,783 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) [2021-06-05 05:39:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-06-05 05:39:58,784 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-06-05 05:39:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:39:58,784 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-06-05 05:39:58,784 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) [2021-06-05 05:39:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-06-05 05:39:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:39:58,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:39:58,786 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:39:58,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:39:58,996 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:39:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:39:58,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 27 times [2021-06-05 05:39:58,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:39:58,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335803672] [2021-06-05 05:39:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:39:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:39:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:59,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:39:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335803672] [2021-06-05 05:39:59,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335803672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367871792] [2021-06-05 05:39:59,102 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 [2021-06-05 05:39:59,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:39:59,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:39:59,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:39:59,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:39:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:39:59,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367871792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:39:59,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:39:59,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 05:39:59,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628260444] [2021-06-05 05:39:59,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:39:59,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:39:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:39:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:39:59,403 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) [2021-06-05 05:40:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:00,851 INFO L93 Difference]: Finished difference Result 2749 states and 5737 transitions. [2021-06-05 05:40:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:40:00,852 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 [2021-06-05 05:40:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:00,858 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 05:40:00,859 INFO L226 Difference]: Without dead ends: 2653 [2021-06-05 05:40:00,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1192.6ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:40:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-06-05 05:40:00,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 712. [2021-06-05 05:40:00,873 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) [2021-06-05 05:40:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-06-05 05:40:00,874 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-06-05 05:40:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:00,874 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-06-05 05:40:00,875 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) [2021-06-05 05:40:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-06-05 05:40:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:00,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:00,876 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 05:40:01,089 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 28 times [2021-06-05 05:40:01,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:01,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358067805] [2021-06-05 05:40:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:01,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:01,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358067805] [2021-06-05 05:40:01,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358067805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:01,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800892969] [2021-06-05 05:40:01,195 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) [2021-06-05 05:40:01,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:40:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:01,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800892969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:01,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:01,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 05:40:01,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874045599] [2021-06-05 05:40:01,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:40:01,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:01,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:40:01,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:40:01,525 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) [2021-06-05 05:40:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:02,860 INFO L93 Difference]: Finished difference Result 3359 states and 7152 transitions. [2021-06-05 05:40:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:40:02,861 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 [2021-06-05 05:40:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:02,867 INFO L225 Difference]: With dead ends: 3359 [2021-06-05 05:40:02,868 INFO L226 Difference]: Without dead ends: 3170 [2021-06-05 05:40:02,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1220.7ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:40:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-06-05 05:40:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 740. [2021-06-05 05:40:02,896 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) [2021-06-05 05:40:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1675 transitions. [2021-06-05 05:40:02,897 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1675 transitions. Word has length 35 [2021-06-05 05:40:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:02,897 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1675 transitions. [2021-06-05 05:40:02,898 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) [2021-06-05 05:40:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1675 transitions. [2021-06-05 05:40:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:40:02,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:02,899 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:03,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:40:03,115 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1190311629, now seen corresponding path program 29 times [2021-06-05 05:40:03,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:03,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069790209] [2021-06-05 05:40:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:03,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:03,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069790209] [2021-06-05 05:40:03,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069790209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:03,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667443336] [2021-06-05 05:40:03,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:03,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:40:03,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 05:40:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:03,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667443336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:03,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:03,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-06-05 05:40:03,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566201928] [2021-06-05 05:40:03,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:40:03,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:40:03,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:40:03,566 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) [2021-06-05 05:40:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:05,204 INFO L93 Difference]: Finished difference Result 2167 states and 4649 transitions. [2021-06-05 05:40:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:40:05,204 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 [2021-06-05 05:40:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:05,207 INFO L225 Difference]: With dead ends: 2167 [2021-06-05 05:40:05,207 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 05:40:05,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1479.9ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:40:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 05:40:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 800. [2021-06-05 05:40:05,221 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) [2021-06-05 05:40:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1854 transitions. [2021-06-05 05:40:05,222 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1854 transitions. Word has length 35 [2021-06-05 05:40:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:05,222 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1854 transitions. [2021-06-05 05:40:05,222 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) [2021-06-05 05:40:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1854 transitions. [2021-06-05 05:40:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:40:05,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:05,223 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:05,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:40:05,437 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 30 times [2021-06-05 05:40:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:05,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742960649] [2021-06-05 05:40:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:05,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:05,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742960649] [2021-06-05 05:40:05,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742960649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:05,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527505296] [2021-06-05 05:40:05,582 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 [2021-06-05 05:40:05,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:40:05,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:05,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:40:05,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:05,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527505296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:05,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:05,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 05:40:05,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459512018] [2021-06-05 05:40:05,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:40:05,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:05,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:40:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:40:05,939 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) [2021-06-05 05:40:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:07,433 INFO L93 Difference]: Finished difference Result 1623 states and 3425 transitions. [2021-06-05 05:40:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:40:07,433 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 [2021-06-05 05:40:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:07,435 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 05:40:07,435 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 05:40:07,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 1387.7ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 05:40:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 05:40:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 807. [2021-06-05 05:40:07,446 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) [2021-06-05 05:40:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1861 transitions. [2021-06-05 05:40:07,447 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1861 transitions. Word has length 37 [2021-06-05 05:40:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:07,448 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1861 transitions. [2021-06-05 05:40:07,448 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) [2021-06-05 05:40:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1861 transitions. [2021-06-05 05:40:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:40:07,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:07,449 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:07,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:07,665 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 31 times [2021-06-05 05:40:07,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:07,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984357780] [2021-06-05 05:40:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:07,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:07,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984357780] [2021-06-05 05:40:07,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984357780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:07,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264663752] [2021-06-05 05:40:07,791 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 [2021-06-05 05:40:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:40:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:08,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264663752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:08,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:08,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-06-05 05:40:08,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295866601] [2021-06-05 05:40:08,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:40:08,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:08,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:40:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:40:08,129 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) [2021-06-05 05:40:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:09,468 INFO L93 Difference]: Finished difference Result 1315 states and 2845 transitions. [2021-06-05 05:40:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:40:09,468 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 [2021-06-05 05:40:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:09,470 INFO L225 Difference]: With dead ends: 1315 [2021-06-05 05:40:09,470 INFO L226 Difference]: Without dead ends: 1311 [2021-06-05 05:40:09,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1342.9ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 05:40:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-05 05:40:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 787. [2021-06-05 05:40:09,480 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) [2021-06-05 05:40:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1820 transitions. [2021-06-05 05:40:09,481 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1820 transitions. Word has length 37 [2021-06-05 05:40:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:09,481 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1820 transitions. [2021-06-05 05:40:09,481 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) [2021-06-05 05:40:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1820 transitions. [2021-06-05 05:40:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:40:09,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:09,482 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:09,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:40:09,706 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:09,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1424137007, now seen corresponding path program 32 times [2021-06-05 05:40:09,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:09,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026383118] [2021-06-05 05:40:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:40:09,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:09,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026383118] [2021-06-05 05:40:09,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026383118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:09,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797699436] [2021-06-05 05:40:09,793 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 [2021-06-05 05:40:09,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:09,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:40:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:10,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797699436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:10,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:10,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-06-05 05:40:10,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168132669] [2021-06-05 05:40:10,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:40:10,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:10,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:40:10,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:40:10,100 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) [2021-06-05 05:40:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:11,184 INFO L93 Difference]: Finished difference Result 2091 states and 4512 transitions. [2021-06-05 05:40:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:40:11,184 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 [2021-06-05 05:40:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:11,187 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 05:40:11,187 INFO L226 Difference]: Without dead ends: 2082 [2021-06-05 05:40:11,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 909.7ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:40:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-06-05 05:40:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1285. [2021-06-05 05:40:11,202 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) [2021-06-05 05:40:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3040 transitions. [2021-06-05 05:40:11,204 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3040 transitions. Word has length 37 [2021-06-05 05:40:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:11,204 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 3040 transitions. [2021-06-05 05:40:11,204 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) [2021-06-05 05:40:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3040 transitions. [2021-06-05 05:40:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:40:11,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:11,206 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:11,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:40:11,421 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-06-05 05:40:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:11,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530925119] [2021-06-05 05:40:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:11,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:11,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530925119] [2021-06-05 05:40:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530925119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:11,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443448999] [2021-06-05 05:40:11,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:11,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:40:11,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:11,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:40:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443448999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:11,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:11,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-06-05 05:40:11,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953449148] [2021-06-05 05:40:11,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:40:11,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:11,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:40:11,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:40:11,667 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) [2021-06-05 05:40:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:11,790 INFO L93 Difference]: Finished difference Result 1931 states and 4496 transitions. [2021-06-05 05:40:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:40:11,791 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 [2021-06-05 05:40:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:11,793 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 05:40:11,793 INFO L226 Difference]: Without dead ends: 1874 [2021-06-05 05:40:11,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:40:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-06-05 05:40:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1608. [2021-06-05 05:40:11,812 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) [2021-06-05 05:40:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 3861 transitions. [2021-06-05 05:40:11,815 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 3861 transitions. Word has length 39 [2021-06-05 05:40:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:11,815 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 3861 transitions. [2021-06-05 05:40:11,815 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) [2021-06-05 05:40:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 3861 transitions. [2021-06-05 05:40:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:40:11,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:11,817 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:12,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:40:12,033 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:12,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 34 times [2021-06-05 05:40:12,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:12,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204570216] [2021-06-05 05:40:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:12,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204570216] [2021-06-05 05:40:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204570216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87105863] [2021-06-05 05:40:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:12,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:12,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:12,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:40:12,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87105863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:12,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:12,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-06-05 05:40:12,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904163907] [2021-06-05 05:40:12,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:40:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:40:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:40:12,569 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) [2021-06-05 05:40:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:14,832 INFO L93 Difference]: Finished difference Result 3088 states and 6943 transitions. [2021-06-05 05:40:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:40:14,833 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 [2021-06-05 05:40:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:14,837 INFO L225 Difference]: With dead ends: 3088 [2021-06-05 05:40:14,837 INFO L226 Difference]: Without dead ends: 3084 [2021-06-05 05:40:14,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1655.7ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:40:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-06-05 05:40:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1766. [2021-06-05 05:40:14,859 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) [2021-06-05 05:40:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-06-05 05:40:14,862 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-06-05 05:40:14,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:14,862 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-06-05 05:40:14,862 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) [2021-06-05 05:40:14,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-06-05 05:40:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:40:14,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:14,864 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:15,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 05:40:15,081 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:15,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 35 times [2021-06-05 05:40:15,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:15,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346242726] [2021-06-05 05:40:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:15,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:15,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346242726] [2021-06-05 05:40:15,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346242726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:15,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068703117] [2021-06-05 05:40:15,374 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 [2021-06-05 05:40:15,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:40:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:40:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:15,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068703117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:15,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:15,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-05 05:40:15,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682227844] [2021-06-05 05:40:15,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:40:15,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:40:15,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:40:15,730 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) [2021-06-05 05:40:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:18,138 INFO L93 Difference]: Finished difference Result 4762 states and 10494 transitions. [2021-06-05 05:40:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 05:40:18,139 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 [2021-06-05 05:40:18,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:18,144 INFO L225 Difference]: With dead ends: 4762 [2021-06-05 05:40:18,145 INFO L226 Difference]: Without dead ends: 4714 [2021-06-05 05:40:18,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 1890.3ms TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 05:40:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-06-05 05:40:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 1566. [2021-06-05 05:40:18,172 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) [2021-06-05 05:40:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-06-05 05:40:18,175 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-06-05 05:40:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:18,175 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-06-05 05:40:18,175 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) [2021-06-05 05:40:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-06-05 05:40:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:40:18,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:18,176 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:18,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:18,392 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 36 times [2021-06-05 05:40:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:18,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406994286] [2021-06-05 05:40:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:18,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:18,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406994286] [2021-06-05 05:40:18,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406994286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:18,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207340294] [2021-06-05 05:40:18,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:18,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:40:18,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:40:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:18,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207340294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:18,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:18,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:40:18,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712768113] [2021-06-05 05:40:18,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:40:18,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:40:18,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:40:18,875 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) [2021-06-05 05:40:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:20,565 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-06-05 05:40:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:40:20,566 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 [2021-06-05 05:40:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:20,571 INFO L225 Difference]: With dead ends: 5523 [2021-06-05 05:40:20,571 INFO L226 Difference]: Without dead ends: 5397 [2021-06-05 05:40:20,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1419.9ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:40:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-06-05 05:40:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-06-05 05:40:20,600 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) [2021-06-05 05:40:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-06-05 05:40:20,602 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-06-05 05:40:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:20,602 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-06-05 05:40:20,602 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) [2021-06-05 05:40:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-06-05 05:40:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:40:20,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:20,604 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:20,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 05:40:20,820 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 37 times [2021-06-05 05:40:20,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:20,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537250997] [2021-06-05 05:40:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:20,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:20,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537250997] [2021-06-05 05:40:20,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537250997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:20,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291935606] [2021-06-05 05:40:20,943 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 [2021-06-05 05:40:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:40:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:21,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291935606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:21,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:21,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 05:40:21,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758270301] [2021-06-05 05:40:21,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:40:21,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:21,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:40:21,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:40:21,319 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) [2021-06-05 05:40:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:22,964 INFO L93 Difference]: Finished difference Result 5929 states and 13118 transitions. [2021-06-05 05:40:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 05:40:22,965 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 [2021-06-05 05:40:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:22,969 INFO L225 Difference]: With dead ends: 5929 [2021-06-05 05:40:22,969 INFO L226 Difference]: Without dead ends: 5656 [2021-06-05 05:40:22,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1454.3ms TimeCoverageRelationStatistics Valid=1779, Invalid=7533, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:40:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-06-05 05:40:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 1758. [2021-06-05 05:40:22,998 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) [2021-06-05 05:40:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-06-05 05:40:23,000 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-06-05 05:40:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:23,000 INFO L482 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-06-05 05:40:23,000 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) [2021-06-05 05:40:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-06-05 05:40:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:40:23,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:23,002 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:23,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 05:40:23,218 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 38 times [2021-06-05 05:40:23,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:23,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386724386] [2021-06-05 05:40:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:23,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:23,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386724386] [2021-06-05 05:40:23,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386724386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:23,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796631191] [2021-06-05 05:40:23,293 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) [2021-06-05 05:40:23,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:23,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:40:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:23,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796631191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:23,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:23,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-06-05 05:40:23,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77676884] [2021-06-05 05:40:23,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:40:23,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:23,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:40:23,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:40:23,635 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) [2021-06-05 05:40:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:25,990 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-06-05 05:40:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:40:25,990 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 [2021-06-05 05:40:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:25,994 INFO L225 Difference]: With dead ends: 3958 [2021-06-05 05:40:25,994 INFO L226 Difference]: Without dead ends: 3954 [2021-06-05 05:40:25,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2123.8ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 05:40:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-06-05 05:40:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-06-05 05:40:26,020 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) [2021-06-05 05:40:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-06-05 05:40:26,022 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-06-05 05:40:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:26,022 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-06-05 05:40:26,022 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) [2021-06-05 05:40:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-06-05 05:40:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:40:26,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:26,024 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:26,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:26,241 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 39 times [2021-06-05 05:40:26,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:26,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827713061] [2021-06-05 05:40:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:26,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:26,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827713061] [2021-06-05 05:40:26,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827713061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:26,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784087546] [2021-06-05 05:40:26,396 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 [2021-06-05 05:40:26,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:40:26,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:40:26,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784087546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:26,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:26,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 05:40:26,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759011816] [2021-06-05 05:40:26,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:40:26,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:40:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:40:26,834 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) [2021-06-05 05:40:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:28,727 INFO L93 Difference]: Finished difference Result 3268 states and 7276 transitions. [2021-06-05 05:40:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:40:28,728 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 [2021-06-05 05:40:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:28,730 INFO L225 Difference]: With dead ends: 3268 [2021-06-05 05:40:28,730 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 05:40:28,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1776.9ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 05:40:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 05:40:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1787. [2021-06-05 05:40:28,751 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) [2021-06-05 05:40:28,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-06-05 05:40:28,753 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-06-05 05:40:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:28,754 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-06-05 05:40:28,754 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) [2021-06-05 05:40:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-06-05 05:40:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:40:28,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:28,756 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:28,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:40:28,969 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:28,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:28,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 40 times [2021-06-05 05:40:28,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:28,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25151715] [2021-06-05 05:40:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:29,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:29,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25151715] [2021-06-05 05:40:29,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25151715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:29,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053895073] [2021-06-05 05:40:29,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:29,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:40:29,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:29,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053895073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:29,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:29,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-06-05 05:40:29,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324870813] [2021-06-05 05:40:29,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:40:29,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:29,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:40:29,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:40:29,443 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) [2021-06-05 05:40:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:31,263 INFO L93 Difference]: Finished difference Result 2437 states and 5514 transitions. [2021-06-05 05:40:31,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:40:31,263 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 [2021-06-05 05:40:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:31,265 INFO L225 Difference]: With dead ends: 2437 [2021-06-05 05:40:31,265 INFO L226 Difference]: Without dead ends: 2433 [2021-06-05 05:40:31,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1752.7ms TimeCoverageRelationStatistics Valid=2626, Invalid=8504, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 05:40:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-05 05:40:31,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1763. [2021-06-05 05:40:31,283 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) [2021-06-05 05:40:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-06-05 05:40:31,285 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-06-05 05:40:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:31,285 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-06-05 05:40:31,285 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) [2021-06-05 05:40:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-06-05 05:40:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:31,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:31,287 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:31,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:31,503 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 41 times [2021-06-05 05:40:31,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:31,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419130604] [2021-06-05 05:40:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:31,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:31,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419130604] [2021-06-05 05:40:31,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419130604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:31,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949610826] [2021-06-05 05:40:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:31,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:40:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:31,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:40:31,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:31,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949610826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:31,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:31,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 05:40:31,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885745397] [2021-06-05 05:40:31,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:40:31,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:31,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:40:31,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:40:31,724 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) [2021-06-05 05:40:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:31,818 INFO L93 Difference]: Finished difference Result 2486 states and 5827 transitions. [2021-06-05 05:40:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:40:31,818 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 [2021-06-05 05:40:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:31,820 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 05:40:31,820 INFO L226 Difference]: Without dead ends: 2429 [2021-06-05 05:40:31,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:40:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-05 05:40:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2196. [2021-06-05 05:40:31,840 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) [2021-06-05 05:40:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5337 transitions. [2021-06-05 05:40:31,842 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5337 transitions. Word has length 43 [2021-06-05 05:40:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:31,842 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 5337 transitions. [2021-06-05 05:40:31,842 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) [2021-06-05 05:40:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5337 transitions. [2021-06-05 05:40:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:31,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:31,845 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:32,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:40:32,061 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 42 times [2021-06-05 05:40:32,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:32,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463531624] [2021-06-05 05:40:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:32,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463531624] [2021-06-05 05:40:32,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463531624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777075107] [2021-06-05 05:40:32,190 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 [2021-06-05 05:40:32,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:40:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:32,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 05:40:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777075107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:32,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:32,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-05 05:40:32,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943764843] [2021-06-05 05:40:32,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:40:32,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:32,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:40:32,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:40:32,610 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) [2021-06-05 05:40:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:35,480 INFO L93 Difference]: Finished difference Result 5082 states and 11297 transitions. [2021-06-05 05:40:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 05:40:35,480 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 [2021-06-05 05:40:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:35,485 INFO L225 Difference]: With dead ends: 5082 [2021-06-05 05:40:35,485 INFO L226 Difference]: Without dead ends: 5049 [2021-06-05 05:40:35,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 1999.3ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 05:40:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-06-05 05:40:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2469. [2021-06-05 05:40:35,529 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) [2021-06-05 05:40:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 6001 transitions. [2021-06-05 05:40:35,540 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 6001 transitions. Word has length 43 [2021-06-05 05:40:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:35,540 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 6001 transitions. [2021-06-05 05:40:35,540 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) [2021-06-05 05:40:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 6001 transitions. [2021-06-05 05:40:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:35,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:35,543 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:35,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:40:35,745 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 43 times [2021-06-05 05:40:35,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:35,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168943703] [2021-06-05 05:40:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:35,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:35,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168943703] [2021-06-05 05:40:35,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168943703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:35,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075829680] [2021-06-05 05:40:35,870 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 [2021-06-05 05:40:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:35,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 05:40:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:36,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075829680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:36,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:36,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-06-05 05:40:36,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957956077] [2021-06-05 05:40:36,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:40:36,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:40:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:40:36,318 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) [2021-06-05 05:40:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:38,863 INFO L93 Difference]: Finished difference Result 4063 states and 9266 transitions. [2021-06-05 05:40:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:40:38,863 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 [2021-06-05 05:40:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:38,867 INFO L225 Difference]: With dead ends: 4063 [2021-06-05 05:40:38,867 INFO L226 Difference]: Without dead ends: 4059 [2021-06-05 05:40:38,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1894.1ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:40:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-06-05 05:40:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 2259. [2021-06-05 05:40:38,890 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) [2021-06-05 05:40:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5477 transitions. [2021-06-05 05:40:38,893 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5477 transitions. Word has length 43 [2021-06-05 05:40:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:38,893 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5477 transitions. [2021-06-05 05:40:38,893 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) [2021-06-05 05:40:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5477 transitions. [2021-06-05 05:40:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:38,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:38,896 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:39,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:39,110 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 44 times [2021-06-05 05:40:39,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:39,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819583497] [2021-06-05 05:40:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:39,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:39,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819583497] [2021-06-05 05:40:39,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819583497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:39,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139847396] [2021-06-05 05:40:39,248 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 [2021-06-05 05:40:39,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:40:39,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:40:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:39,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139847396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:39,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:39,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-06-05 05:40:39,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262533352] [2021-06-05 05:40:39,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:40:39,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:39,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:40:39,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:40:39,676 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) [2021-06-05 05:40:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:42,966 INFO L93 Difference]: Finished difference Result 5894 states and 13012 transitions. [2021-06-05 05:40:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 05:40:42,967 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 [2021-06-05 05:40:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:42,971 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 05:40:42,972 INFO L226 Difference]: Without dead ends: 5846 [2021-06-05 05:40:42,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 2272.5ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 05:40:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-05 05:40:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2347. [2021-06-05 05:40:43,001 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) [2021-06-05 05:40:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 5658 transitions. [2021-06-05 05:40:43,004 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 5658 transitions. Word has length 43 [2021-06-05 05:40:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:43,004 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 5658 transitions. [2021-06-05 05:40:43,004 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) [2021-06-05 05:40:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 5658 transitions. [2021-06-05 05:40:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:43,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:43,006 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:43,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 05:40:43,207 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 45 times [2021-06-05 05:40:43,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:43,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629109695] [2021-06-05 05:40:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:43,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:43,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629109695] [2021-06-05 05:40:43,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629109695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:43,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779215668] [2021-06-05 05:40:43,356 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 [2021-06-05 05:40:43,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 05:40:43,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:40:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779215668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:43,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:43,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-05 05:40:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654709132] [2021-06-05 05:40:43,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:40:43,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:40:43,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:40:43,790 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) [2021-06-05 05:40:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:46,447 INFO L93 Difference]: Finished difference Result 7652 states and 16783 transitions. [2021-06-05 05:40:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 05:40:46,448 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 [2021-06-05 05:40:46,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:46,455 INFO L225 Difference]: With dead ends: 7652 [2021-06-05 05:40:46,455 INFO L226 Difference]: Without dead ends: 7478 [2021-06-05 05:40:46,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 2152.1ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 05:40:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-05 05:40:46,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 2225. [2021-06-05 05:40:46,496 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) [2021-06-05 05:40:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 5402 transitions. [2021-06-05 05:40:46,498 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 5402 transitions. Word has length 43 [2021-06-05 05:40:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:46,498 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 5402 transitions. [2021-06-05 05:40:46,498 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) [2021-06-05 05:40:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 5402 transitions. [2021-06-05 05:40:46,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:46,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:46,500 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:46,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:46,716 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:46,718 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 46 times [2021-06-05 05:40:46,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:46,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798888702] [2021-06-05 05:40:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:46,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798888702] [2021-06-05 05:40:46,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798888702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581903784] [2021-06-05 05:40:46,861 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 [2021-06-05 05:40:46,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:40:46,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:40:46,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:47,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581903784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:47,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:47,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-05 05:40:47,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183001589] [2021-06-05 05:40:47,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:40:47,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:47,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:40:47,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:40:47,255 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) [2021-06-05 05:40:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:49,502 INFO L93 Difference]: Finished difference Result 8464 states and 18466 transitions. [2021-06-05 05:40:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 05:40:49,502 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 [2021-06-05 05:40:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:49,511 INFO L225 Difference]: With dead ends: 8464 [2021-06-05 05:40:49,511 INFO L226 Difference]: Without dead ends: 8230 [2021-06-05 05:40:49,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 1838.0ms TimeCoverageRelationStatistics Valid=2344, Invalid=10996, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 05:40:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-06-05 05:40:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 2241. [2021-06-05 05:40:49,556 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) [2021-06-05 05:40:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 5434 transitions. [2021-06-05 05:40:49,559 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 5434 transitions. Word has length 43 [2021-06-05 05:40:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:49,559 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 5434 transitions. [2021-06-05 05:40:49,559 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) [2021-06-05 05:40:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 5434 transitions. [2021-06-05 05:40:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:49,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:49,561 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:49,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:40:49,773 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 47 times [2021-06-05 05:40:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:49,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582097924] [2021-06-05 05:40:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:49,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:49,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582097924] [2021-06-05 05:40:49,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582097924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:49,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863893900] [2021-06-05 05:40:49,921 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 [2021-06-05 05:40:49,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:40:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:49,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:40:49,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:50,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863893900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:50,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:50,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-05 05:40:50,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355325059] [2021-06-05 05:40:50,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:40:50,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:40:50,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:40:50,311 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) [2021-06-05 05:40:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:52,755 INFO L93 Difference]: Finished difference Result 7868 states and 17355 transitions. [2021-06-05 05:40:52,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:40:52,756 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 [2021-06-05 05:40:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:52,763 INFO L225 Difference]: With dead ends: 7868 [2021-06-05 05:40:52,763 INFO L226 Difference]: Without dead ends: 7508 [2021-06-05 05:40:52,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 2216.1ms TimeCoverageRelationStatistics Valid=3415, Invalid=13615, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 05:40:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-05 05:40:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 2254. [2021-06-05 05:40:52,805 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) [2021-06-05 05:40:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5321 transitions. [2021-06-05 05:40:52,807 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5321 transitions. Word has length 43 [2021-06-05 05:40:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:52,807 INFO L482 AbstractCegarLoop]: Abstraction has 2254 states and 5321 transitions. [2021-06-05 05:40:52,807 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) [2021-06-05 05:40:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5321 transitions. [2021-06-05 05:40:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:40:52,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:52,809 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:53,018 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 48 times [2021-06-05 05:40:53,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:53,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439759448] [2021-06-05 05:40:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:53,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:53,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439759448] [2021-06-05 05:40:53,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439759448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:53,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105435620] [2021-06-05 05:40:53,114 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 [2021-06-05 05:40:53,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:40:53,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:40:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:40:53,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:53,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105435620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:53,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:53,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-06-05 05:40:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195101739] [2021-06-05 05:40:53,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:40:53,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:40:53,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:40:53,476 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) [2021-06-05 05:40:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:40:56,884 INFO L93 Difference]: Finished difference Result 5015 states and 11067 transitions. [2021-06-05 05:40:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 05:40:56,885 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 [2021-06-05 05:40:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:40:56,889 INFO L225 Difference]: With dead ends: 5015 [2021-06-05 05:40:56,889 INFO L226 Difference]: Without dead ends: 5011 [2021-06-05 05:40:56,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3042.0ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-06-05 05:40:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-05 05:40:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2303. [2021-06-05 05:40:56,917 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) [2021-06-05 05:40:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5491 transitions. [2021-06-05 05:40:56,920 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5491 transitions. Word has length 43 [2021-06-05 05:40:56,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:40:56,920 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 5491 transitions. [2021-06-05 05:40:56,920 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) [2021-06-05 05:40:56,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5491 transitions. [2021-06-05 05:40:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:40:56,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:40:56,922 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:40:57,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:40:57,123 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:40:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:40:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 49 times [2021-06-05 05:40:57,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:40:57,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446351086] [2021-06-05 05:40:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:40:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:57,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:40:57,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446351086] [2021-06-05 05:40:57,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446351086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:57,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414355662] [2021-06-05 05:40:57,270 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 [2021-06-05 05:40:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:40:57,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 05:40:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:40:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:40:57,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414355662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:40:57,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:40:57,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-06-05 05:40:57,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606725002] [2021-06-05 05:40:57,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:40:57,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:40:57,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:40:57,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:40:57,681 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) [2021-06-05 05:41:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:00,235 INFO L93 Difference]: Finished difference Result 3620 states and 8022 transitions. [2021-06-05 05:41:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 05:41:00,236 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 [2021-06-05 05:41:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:00,238 INFO L225 Difference]: With dead ends: 3620 [2021-06-05 05:41:00,238 INFO L226 Difference]: Without dead ends: 3422 [2021-06-05 05:41:00,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2291.6ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 05:41:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-05 05:41:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2306. [2021-06-05 05:41:00,260 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) [2021-06-05 05:41:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5486 transitions. [2021-06-05 05:41:00,263 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5486 transitions. Word has length 45 [2021-06-05 05:41:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:00,263 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5486 transitions. [2021-06-05 05:41:00,263 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) [2021-06-05 05:41:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5486 transitions. [2021-06-05 05:41:00,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:41:00,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:00,265 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:00,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:00,481 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 50 times [2021-06-05 05:41:00,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:00,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577138869] [2021-06-05 05:41:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:00,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:00,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577138869] [2021-06-05 05:41:00,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577138869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:00,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354757680] [2021-06-05 05:41:00,561 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 [2021-06-05 05:41:00,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:41:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:00,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354757680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:00,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:00,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-06-05 05:41:00,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374752581] [2021-06-05 05:41:00,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:41:00,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:00,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:41:00,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:41:00,929 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) [2021-06-05 05:41:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:03,249 INFO L93 Difference]: Finished difference Result 3140 states and 7114 transitions. [2021-06-05 05:41:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 05:41:03,249 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 [2021-06-05 05:41:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:03,252 INFO L225 Difference]: With dead ends: 3140 [2021-06-05 05:41:03,252 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 05:41:03,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2153.8ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 05:41:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 05:41:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2306. [2021-06-05 05:41:03,273 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) [2021-06-05 05:41:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5485 transitions. [2021-06-05 05:41:03,275 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5485 transitions. Word has length 45 [2021-06-05 05:41:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:03,276 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5485 transitions. [2021-06-05 05:41:03,276 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) [2021-06-05 05:41:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5485 transitions. [2021-06-05 05:41:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:41:03,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:03,278 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:03,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:03,479 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1657156185, now seen corresponding path program 51 times [2021-06-05 05:41:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:03,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179667980] [2021-06-05 05:41:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:41:03,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179667980] [2021-06-05 05:41:03,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179667980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298991041] [2021-06-05 05:41:03,583 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 [2021-06-05 05:41:03,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 05:41:03,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:03,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:41:03,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:04,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298991041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:04,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:04,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-05 05:41:04,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122817477] [2021-06-05 05:41:04,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:41:04,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:41:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:41:04,010 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) [2021-06-05 05:41:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:06,298 INFO L93 Difference]: Finished difference Result 6205 states and 13891 transitions. [2021-06-05 05:41:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 05:41:06,299 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 [2021-06-05 05:41:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:06,305 INFO L225 Difference]: With dead ends: 6205 [2021-06-05 05:41:06,305 INFO L226 Difference]: Without dead ends: 6205 [2021-06-05 05:41:06,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2172.0ms TimeCoverageRelationStatistics Valid=3242, Invalid=10098, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 05:41:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-06-05 05:41:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3688. [2021-06-05 05:41:06,348 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) [2021-06-05 05:41:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 8902 transitions. [2021-06-05 05:41:06,353 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 8902 transitions. Word has length 45 [2021-06-05 05:41:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:06,353 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 8902 transitions. [2021-06-05 05:41:06,354 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) [2021-06-05 05:41:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 8902 transitions. [2021-06-05 05:41:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:06,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:06,358 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:06,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 05:41:06,570 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 52 times [2021-06-05 05:41:06,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:06,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531924976] [2021-06-05 05:41:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:06,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531924976] [2021-06-05 05:41:06,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531924976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295131101] [2021-06-05 05:41:06,671 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 [2021-06-05 05:41:06,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:06,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:06,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:41:06,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:06,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295131101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:06,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:06,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 05:41:06,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64714034] [2021-06-05 05:41:06,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:41:06,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:41:06,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:41:06,761 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) [2021-06-05 05:41:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:06,862 INFO L93 Difference]: Finished difference Result 4861 states and 11682 transitions. [2021-06-05 05:41:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:41:06,863 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 [2021-06-05 05:41:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:06,868 INFO L225 Difference]: With dead ends: 4861 [2021-06-05 05:41:06,868 INFO L226 Difference]: Without dead ends: 4798 [2021-06-05 05:41:06,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:41:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-06-05 05:41:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4433. [2021-06-05 05:41:06,922 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) [2021-06-05 05:41:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 10854 transitions. [2021-06-05 05:41:06,928 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 10854 transitions. Word has length 47 [2021-06-05 05:41:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:06,929 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 10854 transitions. [2021-06-05 05:41:06,929 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) [2021-06-05 05:41:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 10854 transitions. [2021-06-05 05:41:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:06,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:06,934 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:07,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:07,150 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 53 times [2021-06-05 05:41:07,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:07,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919370867] [2021-06-05 05:41:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:07,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:07,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919370867] [2021-06-05 05:41:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919370867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:07,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465541600] [2021-06-05 05:41:07,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:07,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 05:41:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:41:07,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:07,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465541600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:07,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:07,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-05 05:41:07,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478022248] [2021-06-05 05:41:07,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:41:07,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:41:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:41:07,979 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) [2021-06-05 05:41:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:10,927 INFO L93 Difference]: Finished difference Result 5913 states and 13861 transitions. [2021-06-05 05:41:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:41:10,927 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 [2021-06-05 05:41:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:10,933 INFO L225 Difference]: With dead ends: 5913 [2021-06-05 05:41:10,933 INFO L226 Difference]: Without dead ends: 5907 [2021-06-05 05:41:10,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2216.6ms TimeCoverageRelationStatistics Valid=978, Invalid=10152, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 05:41:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-06-05 05:41:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4386. [2021-06-05 05:41:10,982 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) [2021-06-05 05:41:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 10703 transitions. [2021-06-05 05:41:10,988 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 10703 transitions. Word has length 47 [2021-06-05 05:41:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:10,989 INFO L482 AbstractCegarLoop]: Abstraction has 4386 states and 10703 transitions. [2021-06-05 05:41:10,989 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) [2021-06-05 05:41:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 10703 transitions. [2021-06-05 05:41:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:10,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:10,994 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:11,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:11,194 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 54 times [2021-06-05 05:41:11,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:11,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817517084] [2021-06-05 05:41:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:11,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:11,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817517084] [2021-06-05 05:41:11,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817517084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:11,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581634281] [2021-06-05 05:41:11,343 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 [2021-06-05 05:41:11,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 05:41:11,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:11,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:41:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:11,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581634281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:11,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:11,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-06-05 05:41:11,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503948145] [2021-06-05 05:41:11,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:41:11,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:41:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:41:11,848 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) [2021-06-05 05:41:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:15,346 INFO L93 Difference]: Finished difference Result 8676 states and 19853 transitions. [2021-06-05 05:41:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:41:15,347 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 [2021-06-05 05:41:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:15,356 INFO L225 Difference]: With dead ends: 8676 [2021-06-05 05:41:15,356 INFO L226 Difference]: Without dead ends: 8652 [2021-06-05 05:41:15,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 2405.5ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 05:41:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-06-05 05:41:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 4780. [2021-06-05 05:41:15,417 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) [2021-06-05 05:41:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 11693 transitions. [2021-06-05 05:41:15,423 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 11693 transitions. Word has length 47 [2021-06-05 05:41:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:15,423 INFO L482 AbstractCegarLoop]: Abstraction has 4780 states and 11693 transitions. [2021-06-05 05:41:15,423 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) [2021-06-05 05:41:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 11693 transitions. [2021-06-05 05:41:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:15,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:15,428 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:15,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:15,633 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 55 times [2021-06-05 05:41:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:15,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938111521] [2021-06-05 05:41:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:15,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:15,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938111521] [2021-06-05 05:41:15,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938111521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:15,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202254858] [2021-06-05 05:41:15,797 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 [2021-06-05 05:41:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:41:15,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:16,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202254858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:16,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:16,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-06-05 05:41:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344083398] [2021-06-05 05:41:16,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:41:16,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:16,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:41:16,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:41:16,344 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) [2021-06-05 05:41:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:19,268 INFO L93 Difference]: Finished difference Result 6903 states and 16158 transitions. [2021-06-05 05:41:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:41:19,269 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 [2021-06-05 05:41:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:19,276 INFO L225 Difference]: With dead ends: 6903 [2021-06-05 05:41:19,276 INFO L226 Difference]: Without dead ends: 6899 [2021-06-05 05:41:19,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2085.4ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 05:41:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-05 05:41:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4480. [2021-06-05 05:41:19,329 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) [2021-06-05 05:41:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 10951 transitions. [2021-06-05 05:41:19,335 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 10951 transitions. Word has length 47 [2021-06-05 05:41:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:19,335 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 10951 transitions. [2021-06-05 05:41:19,335 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) [2021-06-05 05:41:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 10951 transitions. [2021-06-05 05:41:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:19,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:19,340 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:19,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:41:19,546 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:19,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 56 times [2021-06-05 05:41:19,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:19,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121874246] [2021-06-05 05:41:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:19,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121874246] [2021-06-05 05:41:19,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121874246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:19,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160789499] [2021-06-05 05:41:19,708 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 [2021-06-05 05:41:19,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:19,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:41:19,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:20,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160789499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:20,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:20,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-05 05:41:20,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584616183] [2021-06-05 05:41:20,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:41:20,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:20,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:41:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:41:20,227 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) [2021-06-05 05:41:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:24,542 INFO L93 Difference]: Finished difference Result 10549 states and 24047 transitions. [2021-06-05 05:41:24,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 05:41:24,542 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 [2021-06-05 05:41:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:24,553 INFO L225 Difference]: With dead ends: 10549 [2021-06-05 05:41:24,553 INFO L226 Difference]: Without dead ends: 10501 [2021-06-05 05:41:24,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 2931.5ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 05:41:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-05 05:41:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 4420. [2021-06-05 05:41:24,644 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) [2021-06-05 05:41:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 10797 transitions. [2021-06-05 05:41:24,650 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 10797 transitions. Word has length 47 [2021-06-05 05:41:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:24,650 INFO L482 AbstractCegarLoop]: Abstraction has 4420 states and 10797 transitions. [2021-06-05 05:41:24,650 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) [2021-06-05 05:41:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 10797 transitions. [2021-06-05 05:41:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:24,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:24,654 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:24,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:41:24,855 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 57 times [2021-06-05 05:41:24,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:24,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353468197] [2021-06-05 05:41:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:25,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:25,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353468197] [2021-06-05 05:41:25,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353468197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:25,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278392228] [2021-06-05 05:41:25,002 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 [2021-06-05 05:41:25,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 05:41:25,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:41:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:25,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278392228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:25,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:25,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-06-05 05:41:25,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830995225] [2021-06-05 05:41:25,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:41:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:41:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:41:25,477 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) [2021-06-05 05:41:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:29,563 INFO L93 Difference]: Finished difference Result 12102 states and 27344 transitions. [2021-06-05 05:41:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 05:41:29,563 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 [2021-06-05 05:41:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:29,576 INFO L225 Difference]: With dead ends: 12102 [2021-06-05 05:41:29,576 INFO L226 Difference]: Without dead ends: 12024 [2021-06-05 05:41:29,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 2845.3ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 05:41:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-06-05 05:41:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 4352. [2021-06-05 05:41:29,668 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) [2021-06-05 05:41:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 10649 transitions. [2021-06-05 05:41:29,673 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 10649 transitions. Word has length 47 [2021-06-05 05:41:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:29,673 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 10649 transitions. [2021-06-05 05:41:29,673 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) [2021-06-05 05:41:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 10649 transitions. [2021-06-05 05:41:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:29,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:29,677 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:29,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:29,877 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:29,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:29,878 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 58 times [2021-06-05 05:41:29,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:29,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255768585] [2021-06-05 05:41:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:30,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:30,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255768585] [2021-06-05 05:41:30,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255768585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:30,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899959198] [2021-06-05 05:41:30,047 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 [2021-06-05 05:41:30,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:30,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 05:41:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:30,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899959198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:30,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:30,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-06-05 05:41:30,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629449283] [2021-06-05 05:41:30,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:41:30,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:41:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:41:30,519 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) [2021-06-05 05:41:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:33,147 INFO L93 Difference]: Finished difference Result 14421 states and 32596 transitions. [2021-06-05 05:41:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 05:41:33,147 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 [2021-06-05 05:41:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:33,162 INFO L225 Difference]: With dead ends: 14421 [2021-06-05 05:41:33,162 INFO L226 Difference]: Without dead ends: 14229 [2021-06-05 05:41:33,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 2173.6ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 05:41:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14229 states. [2021-06-05 05:41:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14229 to 4384. [2021-06-05 05:41:33,239 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) [2021-06-05 05:41:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10713 transitions. [2021-06-05 05:41:33,245 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10713 transitions. Word has length 47 [2021-06-05 05:41:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:33,245 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 10713 transitions. [2021-06-05 05:41:33,245 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) [2021-06-05 05:41:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10713 transitions. [2021-06-05 05:41:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:33,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:33,249 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:33,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 05:41:33,449 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:33,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:33,449 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 59 times [2021-06-05 05:41:33,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:33,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100387134] [2021-06-05 05:41:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:33,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100387134] [2021-06-05 05:41:33,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100387134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272476943] [2021-06-05 05:41:33,631 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 [2021-06-05 05:41:33,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:41:33,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:41:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:34,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272476943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:34,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:34,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-06-05 05:41:34,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103147744] [2021-06-05 05:41:34,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:41:34,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:41:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:41:34,153 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) [2021-06-05 05:41:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:37,281 INFO L93 Difference]: Finished difference Result 14220 states and 31957 transitions. [2021-06-05 05:41:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-05 05:41:37,281 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 [2021-06-05 05:41:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:37,297 INFO L225 Difference]: With dead ends: 14220 [2021-06-05 05:41:37,297 INFO L226 Difference]: Without dead ends: 13917 [2021-06-05 05:41:37,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 2715.8ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-06-05 05:41:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2021-06-05 05:41:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 4404. [2021-06-05 05:41:37,380 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) [2021-06-05 05:41:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 10753 transitions. [2021-06-05 05:41:37,386 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 10753 transitions. Word has length 47 [2021-06-05 05:41:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:37,386 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 10753 transitions. [2021-06-05 05:41:37,386 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) [2021-06-05 05:41:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 10753 transitions. [2021-06-05 05:41:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:37,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:37,390 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:37,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:37,591 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 60 times [2021-06-05 05:41:37,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:37,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001544299] [2021-06-05 05:41:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:37,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:37,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001544299] [2021-06-05 05:41:37,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001544299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:37,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412916936] [2021-06-05 05:41:37,768 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 [2021-06-05 05:41:37,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 05:41:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:37,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:41:37,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:38,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412916936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:38,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:38,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 05:41:38,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003465156] [2021-06-05 05:41:38,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:41:38,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:38,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:41:38,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:41:38,354 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) [2021-06-05 05:41:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:41,571 INFO L93 Difference]: Finished difference Result 13609 states and 30879 transitions. [2021-06-05 05:41:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 05:41:41,571 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 [2021-06-05 05:41:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:41,584 INFO L225 Difference]: With dead ends: 13609 [2021-06-05 05:41:41,584 INFO L226 Difference]: Without dead ends: 13078 [2021-06-05 05:41:41,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8506 ImplicationChecksByTransitivity, 2906.3ms TimeCoverageRelationStatistics Valid=4891, Invalid=19289, Unknown=0, NotChecked=0, Total=24180 [2021-06-05 05:41:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-06-05 05:41:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 4605. [2021-06-05 05:41:41,655 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) [2021-06-05 05:41:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 10986 transitions. [2021-06-05 05:41:41,661 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 10986 transitions. Word has length 47 [2021-06-05 05:41:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:41,661 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 10986 transitions. [2021-06-05 05:41:41,661 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) [2021-06-05 05:41:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 10986 transitions. [2021-06-05 05:41:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:41:41,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:41,665 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:41,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 05:41:41,865 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 61 times [2021-06-05 05:41:41,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:41,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921445047] [2021-06-05 05:41:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:41,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921445047] [2021-06-05 05:41:41,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921445047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17055225] [2021-06-05 05:41:41,970 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 [2021-06-05 05:41:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 05:41:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:42,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17055225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:42,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:42,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2021-06-05 05:41:42,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078344776] [2021-06-05 05:41:42,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:41:42,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:41:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:41:42,372 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) [2021-06-05 05:41:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:44,901 INFO L93 Difference]: Finished difference Result 9014 states and 20637 transitions. [2021-06-05 05:41:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 05:41:44,902 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 [2021-06-05 05:41:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:44,908 INFO L225 Difference]: With dead ends: 9014 [2021-06-05 05:41:44,908 INFO L226 Difference]: Without dead ends: 9010 [2021-06-05 05:41:44,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6196 ImplicationChecksByTransitivity, 2262.4ms TimeCoverageRelationStatistics Valid=3809, Invalid=13221, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 05:41:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-06-05 05:41:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4724. [2021-06-05 05:41:44,950 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) [2021-06-05 05:41:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 11375 transitions. [2021-06-05 05:41:44,955 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 11375 transitions. Word has length 47 [2021-06-05 05:41:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:44,955 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 11375 transitions. [2021-06-05 05:41:44,955 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) [2021-06-05 05:41:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 11375 transitions. [2021-06-05 05:41:44,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:44,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:44,958 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:45,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:45,159 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 62 times [2021-06-05 05:41:45,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:45,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089166464] [2021-06-05 05:41:45,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:45,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:45,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089166464] [2021-06-05 05:41:45,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089166464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:45,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547068801] [2021-06-05 05:41:45,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:45,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:41:45,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 05:41:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:45,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547068801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:45,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:45,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-06-05 05:41:45,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109612417] [2021-06-05 05:41:45,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:41:45,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:45,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:41:45,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:41:45,821 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) [2021-06-05 05:41:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:49,076 INFO L93 Difference]: Finished difference Result 6691 states and 15329 transitions. [2021-06-05 05:41:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 05:41:49,077 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 [2021-06-05 05:41:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:49,083 INFO L225 Difference]: With dead ends: 6691 [2021-06-05 05:41:49,083 INFO L226 Difference]: Without dead ends: 6421 [2021-06-05 05:41:49,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 2938.5ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 05:41:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-05 05:41:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4591. [2021-06-05 05:41:49,128 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) [2021-06-05 05:41:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 11018 transitions. [2021-06-05 05:41:49,135 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 11018 transitions. Word has length 49 [2021-06-05 05:41:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:49,135 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 11018 transitions. [2021-06-05 05:41:49,135 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) [2021-06-05 05:41:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 11018 transitions. [2021-06-05 05:41:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 05:41:49,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:49,139 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:49,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 05:41:49,345 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:49,345 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 63 times [2021-06-05 05:41:49,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:49,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431892583] [2021-06-05 05:41:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:49,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:49,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431892583] [2021-06-05 05:41:49,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431892583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:49,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339291894] [2021-06-05 05:41:49,433 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 [2021-06-05 05:41:49,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 05:41:49,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:49,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 05:41:49,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 17 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:49,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339291894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:49,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:49,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2021-06-05 05:41:49,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297895315] [2021-06-05 05:41:49,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:41:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:49,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:41:49,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:41:49,912 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) [2021-06-05 05:41:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:55,290 INFO L93 Difference]: Finished difference Result 8254 states and 18601 transitions. [2021-06-05 05:41:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-06-05 05:41:55,291 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 [2021-06-05 05:41:55,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:55,297 INFO L225 Difference]: With dead ends: 8254 [2021-06-05 05:41:55,297 INFO L226 Difference]: Without dead ends: 8250 [2021-06-05 05:41:55,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19820 ImplicationChecksByTransitivity, 4716.8ms TimeCoverageRelationStatistics Valid=9481, Invalid=36529, Unknown=0, NotChecked=0, Total=46010 [2021-06-05 05:41:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-06-05 05:41:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 4599. [2021-06-05 05:41:55,344 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) [2021-06-05 05:41:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 11038 transitions. [2021-06-05 05:41:55,349 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 11038 transitions. Word has length 49 [2021-06-05 05:41:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:55,349 INFO L482 AbstractCegarLoop]: Abstraction has 4599 states and 11038 transitions. [2021-06-05 05:41:55,349 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) [2021-06-05 05:41:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 11038 transitions. [2021-06-05 05:41:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:41:55,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:55,353 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:55,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:55,553 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 64 times [2021-06-05 05:41:55,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:55,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515550180] [2021-06-05 05:41:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:55,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:55,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515550180] [2021-06-05 05:41:55,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515550180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:55,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273630347] [2021-06-05 05:41:55,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:41:55,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:41:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:55,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 05:41:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:55,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273630347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:55,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:55,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 05:41:55,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104450603] [2021-06-05 05:41:55,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:41:55,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:41:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:41:55,766 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) [2021-06-05 05:41:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:41:55,889 INFO L93 Difference]: Finished difference Result 5889 states and 14053 transitions. [2021-06-05 05:41:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:41:55,889 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 [2021-06-05 05:41:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:41:55,895 INFO L225 Difference]: With dead ends: 5889 [2021-06-05 05:41:55,895 INFO L226 Difference]: Without dead ends: 5820 [2021-06-05 05:41:55,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:41:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-06-05 05:41:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5433. [2021-06-05 05:41:55,948 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) [2021-06-05 05:41:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 13240 transitions. [2021-06-05 05:41:55,955 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 13240 transitions. Word has length 51 [2021-06-05 05:41:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:41:55,955 INFO L482 AbstractCegarLoop]: Abstraction has 5433 states and 13240 transitions. [2021-06-05 05:41:55,955 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) [2021-06-05 05:41:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 13240 transitions. [2021-06-05 05:41:55,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:41:55,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:41:55,960 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:41:56,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 05:41:56,160 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:41:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:41:56,160 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 65 times [2021-06-05 05:41:56,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:41:56,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503587622] [2021-06-05 05:41:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:41:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:41:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:56,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:41:56,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503587622] [2021-06-05 05:41:56,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503587622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:56,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604185385] [2021-06-05 05:41:56,533 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 [2021-06-05 05:41:56,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 05:41:56,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:41:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:41:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:41:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:41:57,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604185385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:41:57,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:41:57,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-05 05:41:57,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850518366] [2021-06-05 05:41:57,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:41:57,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:41:57,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:41:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:41:57,156 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) [2021-06-05 05:42:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:00,369 INFO L93 Difference]: Finished difference Result 7094 states and 16636 transitions. [2021-06-05 05:42:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:42:00,369 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 [2021-06-05 05:42:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:00,376 INFO L225 Difference]: With dead ends: 7094 [2021-06-05 05:42:00,376 INFO L226 Difference]: Without dead ends: 7088 [2021-06-05 05:42:00,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2594.3ms TimeCoverageRelationStatistics Valid=1100, Invalid=12706, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 05:42:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-06-05 05:42:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 5314. [2021-06-05 05:42:00,426 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) [2021-06-05 05:42:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 12940 transitions. [2021-06-05 05:42:00,432 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 12940 transitions. Word has length 51 [2021-06-05 05:42:00,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:00,433 INFO L482 AbstractCegarLoop]: Abstraction has 5314 states and 12940 transitions. [2021-06-05 05:42:00,433 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) [2021-06-05 05:42:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 12940 transitions. [2021-06-05 05:42:00,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:00,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:00,436 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:00,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 05:42:00,637 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 66 times [2021-06-05 05:42:00,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:00,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256481153] [2021-06-05 05:42:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:00,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256481153] [2021-06-05 05:42:00,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256481153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:00,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142706361] [2021-06-05 05:42:00,802 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 [2021-06-05 05:42:00,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 05:42:00,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:00,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:42:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:01,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142706361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:01,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:01,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-06-05 05:42:01,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225619245] [2021-06-05 05:42:01,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:42:01,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:42:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:42:01,392 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) [2021-06-05 05:42:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:05,701 INFO L93 Difference]: Finished difference Result 10585 states and 24178 transitions. [2021-06-05 05:42:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 05:42:05,701 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 [2021-06-05 05:42:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:05,710 INFO L225 Difference]: With dead ends: 10585 [2021-06-05 05:42:05,710 INFO L226 Difference]: Without dead ends: 10561 [2021-06-05 05:42:05,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 2827.6ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-06-05 05:42:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-05 05:42:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 5782. [2021-06-05 05:42:05,776 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) [2021-06-05 05:42:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 14110 transitions. [2021-06-05 05:42:05,783 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 14110 transitions. Word has length 51 [2021-06-05 05:42:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:05,783 INFO L482 AbstractCegarLoop]: Abstraction has 5782 states and 14110 transitions. [2021-06-05 05:42:05,783 INFO L483 AbstractCegarLoop]: Interpolant 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) [2021-06-05 05:42:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 14110 transitions. [2021-06-05 05:42:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:05,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:05,788 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:05,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 05:42:05,998 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:05,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:05,999 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 67 times [2021-06-05 05:42:05,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:05,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5138506] [2021-06-05 05:42:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:06,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:06,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5138506] [2021-06-05 05:42:06,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5138506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:06,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736936190] [2021-06-05 05:42:06,159 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:42:06,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:06,733 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:06,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736936190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:06,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:06,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-06-05 05:42:06,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722220712] [2021-06-05 05:42:06,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:42:06,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:06,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:42:06,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:42:06,734 INFO L87 Difference]: Start difference. First operand 5782 states and 14110 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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) [2021-06-05 05:42:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:10,284 INFO L93 Difference]: Finished difference Result 8201 states and 19178 transitions. [2021-06-05 05:42:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 05:42:10,291 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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 51 [2021-06-05 05:42:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:10,297 INFO L225 Difference]: With dead ends: 8201 [2021-06-05 05:42:10,297 INFO L226 Difference]: Without dead ends: 8197 [2021-06-05 05:42:10,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 2473.7ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 05:42:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-06-05 05:42:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 5452. [2021-06-05 05:42:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 2.439185470555861) internal successors, (13296), 5451 states have internal predecessors, (13296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 13296 transitions. [2021-06-05 05:42:10,359 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 13296 transitions. Word has length 51 [2021-06-05 05:42:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:10,359 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 13296 transitions. [2021-06-05 05:42:10,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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) [2021-06-05 05:42:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 13296 transitions. [2021-06-05 05:42:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:10,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:10,364 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:10,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:10,577 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 68 times [2021-06-05 05:42:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:10,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444178984] [2021-06-05 05:42:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:10,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:10,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444178984] [2021-06-05 05:42:10,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444178984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:10,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243431456] [2021-06-05 05:42:10,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:10,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:10,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:42:10,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:11,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243431456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:11,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:11,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-06-05 05:42:11,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468860803] [2021-06-05 05:42:11,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:42:11,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:11,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:42:11,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:42:11,275 INFO L87 Difference]: Start difference. First operand 5452 states and 13296 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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) [2021-06-05 05:42:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:16,472 INFO L93 Difference]: Finished difference Result 12411 states and 28171 transitions. [2021-06-05 05:42:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 05:42:16,472 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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 [2021-06-05 05:42:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:16,485 INFO L225 Difference]: With dead ends: 12411 [2021-06-05 05:42:16,485 INFO L226 Difference]: Without dead ends: 12363 [2021-06-05 05:42:16,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 3393.9ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 05:42:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2021-06-05 05:42:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 5448. [2021-06-05 05:42:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.4384064622728108) internal successors, (13282), 5447 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 13282 transitions. [2021-06-05 05:42:16,574 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 13282 transitions. Word has length 51 [2021-06-05 05:42:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:16,574 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 13282 transitions. [2021-06-05 05:42:16,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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) [2021-06-05 05:42:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 13282 transitions. [2021-06-05 05:42:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:16,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:16,578 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:16,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:16,779 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 69 times [2021-06-05 05:42:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:16,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464441395] [2021-06-05 05:42:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:16,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464441395] [2021-06-05 05:42:16,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464441395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622418313] [2021-06-05 05:42:16,947 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:16,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 05:42:16,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:42:16,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:17,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622418313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:17,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:17,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-06-05 05:42:17,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832015781] [2021-06-05 05:42:17,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:42:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:42:17,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:42:17,465 INFO L87 Difference]: Start difference. First operand 5448 states and 13282 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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) [2021-06-05 05:42:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:22,884 INFO L93 Difference]: Finished difference Result 15077 states and 34147 transitions. [2021-06-05 05:42:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 05:42:22,884 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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 [2021-06-05 05:42:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:22,901 INFO L225 Difference]: With dead ends: 15077 [2021-06-05 05:42:22,902 INFO L226 Difference]: Without dead ends: 14999 [2021-06-05 05:42:22,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 3714.0ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-06-05 05:42:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14999 states. [2021-06-05 05:42:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14999 to 5335. [2021-06-05 05:42:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5334 states have (on average 2.4401949756280463) internal successors, (13016), 5334 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 13016 transitions. [2021-06-05 05:42:22,993 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 13016 transitions. Word has length 51 [2021-06-05 05:42:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:22,994 INFO L482 AbstractCegarLoop]: Abstraction has 5335 states and 13016 transitions. [2021-06-05 05:42:22,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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) [2021-06-05 05:42:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 13016 transitions. [2021-06-05 05:42:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:22,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:22,997 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:23,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 05:42:23,201 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 70 times [2021-06-05 05:42:23,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:23,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759232866] [2021-06-05 05:42:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:23,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:23,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759232866] [2021-06-05 05:42:23,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759232866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:23,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87217365] [2021-06-05 05:42:23,369 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:23,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:23,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:23,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:42:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87217365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:23,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:23,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-06-05 05:42:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701315369] [2021-06-05 05:42:23,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:42:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:42:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:42:23,874 INFO L87 Difference]: Start difference. First operand 5335 states and 13016 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 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) [2021-06-05 05:42:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:28,041 INFO L93 Difference]: Finished difference Result 16843 states and 37762 transitions. [2021-06-05 05:42:28,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-05 05:42:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 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 [2021-06-05 05:42:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:28,058 INFO L225 Difference]: With dead ends: 16843 [2021-06-05 05:42:28,059 INFO L226 Difference]: Without dead ends: 16573 [2021-06-05 05:42:28,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 3209.8ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 05:42:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2021-06-05 05:42:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 5289. [2021-06-05 05:42:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 2.440998487140696) internal successors, (12908), 5288 states have internal predecessors, (12908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 12908 transitions. [2021-06-05 05:42:28,163 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 12908 transitions. Word has length 51 [2021-06-05 05:42:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:28,163 INFO L482 AbstractCegarLoop]: Abstraction has 5289 states and 12908 transitions. [2021-06-05 05:42:28,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 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) [2021-06-05 05:42:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 12908 transitions. [2021-06-05 05:42:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:28,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:28,166 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:28,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 05:42:28,367 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 71 times [2021-06-05 05:42:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:28,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144464211] [2021-06-05 05:42:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:28,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144464211] [2021-06-05 05:42:28,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144464211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94320627] [2021-06-05 05:42:28,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:28,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 05:42:28,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 05:42:28,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:29,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94320627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:29,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:29,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-06-05 05:42:29,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611478356] [2021-06-05 05:42:29,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:42:29,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:29,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:42:29,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:42:29,059 INFO L87 Difference]: Start difference. First operand 5289 states and 12908 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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) [2021-06-05 05:42:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:32,525 INFO L93 Difference]: Finished difference Result 18875 states and 42539 transitions. [2021-06-05 05:42:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 05:42:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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 [2021-06-05 05:42:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:32,543 INFO L225 Difference]: With dead ends: 18875 [2021-06-05 05:42:32,543 INFO L226 Difference]: Without dead ends: 18587 [2021-06-05 05:42:32,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9833 ImplicationChecksByTransitivity, 2888.0ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 05:42:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18587 states. [2021-06-05 05:42:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18587 to 5317. [2021-06-05 05:42:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5316 states have (on average 2.438675696012039) internal successors, (12964), 5316 states have internal predecessors, (12964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 12964 transitions. [2021-06-05 05:42:32,648 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 12964 transitions. Word has length 51 [2021-06-05 05:42:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:32,648 INFO L482 AbstractCegarLoop]: Abstraction has 5317 states and 12964 transitions. [2021-06-05 05:42:32,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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) [2021-06-05 05:42:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 12964 transitions. [2021-06-05 05:42:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:32,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:32,652 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:32,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:32,852 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:32,853 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 72 times [2021-06-05 05:42:32,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:32,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112713326] [2021-06-05 05:42:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:33,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:33,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112713326] [2021-06-05 05:42:33,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112713326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:33,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247380551] [2021-06-05 05:42:33,036 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:33,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:42:33,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:42:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:33,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247380551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:33,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:33,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-06-05 05:42:33,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455020375] [2021-06-05 05:42:33,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:42:33,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:42:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:42:33,547 INFO L87 Difference]: Start difference. First operand 5317 states and 12964 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) [2021-06-05 05:42:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:37,315 INFO L93 Difference]: Finished difference Result 16588 states and 36726 transitions. [2021-06-05 05:42:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-06-05 05:42:37,315 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 [2021-06-05 05:42:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:37,331 INFO L225 Difference]: With dead ends: 16588 [2021-06-05 05:42:37,332 INFO L226 Difference]: Without dead ends: 16174 [2021-06-05 05:42:37,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 3202.2ms TimeCoverageRelationStatistics Valid=5931, Invalid=25575, Unknown=0, NotChecked=0, Total=31506 [2021-06-05 05:42:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2021-06-05 05:42:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 5337. [2021-06-05 05:42:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 2.437031484257871) internal successors, (13004), 5336 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 13004 transitions. [2021-06-05 05:42:37,426 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 13004 transitions. Word has length 51 [2021-06-05 05:42:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:37,426 INFO L482 AbstractCegarLoop]: Abstraction has 5337 states and 13004 transitions. [2021-06-05 05:42:37,426 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) [2021-06-05 05:42:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 13004 transitions. [2021-06-05 05:42:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:42:37,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:37,429 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:37,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:37,630 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 73 times [2021-06-05 05:42:37,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:37,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800176323] [2021-06-05 05:42:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:37,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800176323] [2021-06-05 05:42:37,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800176323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:37,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205182145] [2021-06-05 05:42:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:42:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:38,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205182145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:38,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:38,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-05 05:42:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054831613] [2021-06-05 05:42:38,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:42:38,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:42:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:42:38,383 INFO L87 Difference]: Start difference. First operand 5337 states and 13004 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) [2021-06-05 05:42:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:41,929 INFO L93 Difference]: Finished difference Result 16800 states and 38164 transitions. [2021-06-05 05:42:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 05:42:41,930 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 [2021-06-05 05:42:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:41,943 INFO L225 Difference]: With dead ends: 16800 [2021-06-05 05:42:41,943 INFO L226 Difference]: Without dead ends: 16146 [2021-06-05 05:42:41,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 3086.5ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 05:42:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2021-06-05 05:42:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 4803. [2021-06-05 05:42:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 2.4123281965847565) internal successors, (11584), 4802 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 11584 transitions. [2021-06-05 05:42:42,032 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 11584 transitions. Word has length 51 [2021-06-05 05:42:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:42,032 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 11584 transitions. [2021-06-05 05:42:42,032 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) [2021-06-05 05:42:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 11584 transitions. [2021-06-05 05:42:42,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 05:42:42,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:42,035 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:42,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:42,236 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:42,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:42,236 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 74 times [2021-06-05 05:42:42,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:42,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036027437] [2021-06-05 05:42:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:42,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:42,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036027437] [2021-06-05 05:42:42,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036027437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:42,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688395894] [2021-06-05 05:42:42,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:42,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:42:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:42:42,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:42,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688395894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:42,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:42,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-06-05 05:42:42,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441224504] [2021-06-05 05:42:42,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 05:42:42,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:42,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 05:42:42,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:42:42,988 INFO L87 Difference]: Start difference. First operand 4803 states and 11584 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:47,037 INFO L93 Difference]: Finished difference Result 6738 states and 15323 transitions. [2021-06-05 05:42:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 05:42:47,038 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 05:42:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:47,044 INFO L225 Difference]: With dead ends: 6738 [2021-06-05 05:42:47,044 INFO L226 Difference]: Without dead ends: 6426 [2021-06-05 05:42:47,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 3660.7ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-06-05 05:42:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-06-05 05:42:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 4802. [2021-06-05 05:42:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409289731305978) internal successors, (11567), 4801 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11567 transitions. [2021-06-05 05:42:47,097 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11567 transitions. Word has length 53 [2021-06-05 05:42:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:47,098 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11567 transitions. [2021-06-05 05:42:47,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11567 transitions. [2021-06-05 05:42:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 05:42:47,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:47,101 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:47,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:47,317 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:47,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 75 times [2021-06-05 05:42:47,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:47,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587932647] [2021-06-05 05:42:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:47,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587932647] [2021-06-05 05:42:47,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587932647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884249297] [2021-06-05 05:42:47,418 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:47,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 05:42:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:42:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:47,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884249297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:47,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:47,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-06-05 05:42:47,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198125504] [2021-06-05 05:42:47,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:42:47,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:48,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:42:48,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:42:48,000 INFO L87 Difference]: Start difference. First operand 4802 states and 11567 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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) [2021-06-05 05:42:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:54,829 INFO L93 Difference]: Finished difference Result 6316 states and 14547 transitions. [2021-06-05 05:42:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-05 05:42:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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 53 [2021-06-05 05:42:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:54,834 INFO L225 Difference]: With dead ends: 6316 [2021-06-05 05:42:54,834 INFO L226 Difference]: Without dead ends: 6312 [2021-06-05 05:42:54,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 6469.6ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-06-05 05:42:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-06-05 05:42:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 4802. [2021-06-05 05:42:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409081441366382) internal successors, (11566), 4801 states have internal predecessors, (11566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11566 transitions. [2021-06-05 05:42:54,884 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11566 transitions. Word has length 53 [2021-06-05 05:42:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:54,884 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11566 transitions. [2021-06-05 05:42:54,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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) [2021-06-05 05:42:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11566 transitions. [2021-06-05 05:42:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:42:54,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:54,887 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:55,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:55,087 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 76 times [2021-06-05 05:42:55,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:55,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774919689] [2021-06-05 05:42:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:55,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:55,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774919689] [2021-06-05 05:42:55,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774919689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110732620] [2021-06-05 05:42:55,197 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:55,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:42:55,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:55,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:42:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:55,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110732620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:55,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:55,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 05:42:55,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418131897] [2021-06-05 05:42:55,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:42:55,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:55,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:42:55,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:42:55,310 INFO L87 Difference]: Start difference. First operand 4802 states and 11566 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:42:55,446 INFO L93 Difference]: Finished difference Result 6109 states and 14541 transitions. [2021-06-05 05:42:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:42:55,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:42:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:42:55,452 INFO L225 Difference]: With dead ends: 6109 [2021-06-05 05:42:55,452 INFO L226 Difference]: Without dead ends: 6034 [2021-06-05 05:42:55,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:42:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2021-06-05 05:42:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5577. [2021-06-05 05:42:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5576 states have (on average 2.438307030129125) internal successors, (13596), 5576 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 13596 transitions. [2021-06-05 05:42:55,511 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 13596 transitions. Word has length 55 [2021-06-05 05:42:55,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:42:55,512 INFO L482 AbstractCegarLoop]: Abstraction has 5577 states and 13596 transitions. [2021-06-05 05:42:55,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:42:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 13596 transitions. [2021-06-05 05:42:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:42:55,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:42:55,515 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:42:55,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:55,716 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:42:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:42:55,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 77 times [2021-06-05 05:42:55,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:42:55,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618122653] [2021-06-05 05:42:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:42:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:42:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:56,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:42:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618122653] [2021-06-05 05:42:56,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618122653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:56,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398983994] [2021-06-05 05:42:56,045 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:42:56,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 05:42:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:42:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:42:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:42:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:42:56,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398983994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:42:56,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:42:56,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-05 05:42:56,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433900199] [2021-06-05 05:42:56,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 05:42:56,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:42:56,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 05:42:56,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:42:56,774 INFO L87 Difference]: Start difference. First operand 5577 states and 13596 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:00,685 INFO L93 Difference]: Finished difference Result 7325 states and 17131 transitions. [2021-06-05 05:43:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 05:43:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:00,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:00,692 INFO L225 Difference]: With dead ends: 7325 [2021-06-05 05:43:00,692 INFO L226 Difference]: Without dead ends: 7319 [2021-06-05 05:43:00,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 2981.9ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 05:43:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-06-05 05:43:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5539. [2021-06-05 05:43:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 5538 states have (on average 2.438605994944023) internal successors, (13505), 5538 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 13505 transitions. [2021-06-05 05:43:00,750 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 13505 transitions. Word has length 55 [2021-06-05 05:43:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:00,750 INFO L482 AbstractCegarLoop]: Abstraction has 5539 states and 13505 transitions. [2021-06-05 05:43:00,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 13505 transitions. [2021-06-05 05:43:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:00,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:00,754 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:00,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 05:43:00,955 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 78 times [2021-06-05 05:43:00,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:00,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334829867] [2021-06-05 05:43:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:01,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334829867] [2021-06-05 05:43:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334829867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:01,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462575128] [2021-06-05 05:43:01,133 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:01,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 05:43:01,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:43:01,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:01,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462575128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:01,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:01,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-06-05 05:43:01,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991391900] [2021-06-05 05:43:01,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:43:01,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:01,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:43:01,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:43:01,778 INFO L87 Difference]: Start difference. First operand 5539 states and 13505 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:06,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:06,781 INFO L93 Difference]: Finished difference Result 10773 states and 24488 transitions. [2021-06-05 05:43:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 05:43:06,782 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:06,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:06,792 INFO L225 Difference]: With dead ends: 10773 [2021-06-05 05:43:06,793 INFO L226 Difference]: Without dead ends: 10749 [2021-06-05 05:43:06,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 3282.8ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-06-05 05:43:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-06-05 05:43:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 5893. [2021-06-05 05:43:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 2.4414460285132384) internal successors, (14385), 5892 states have internal predecessors, (14385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 14385 transitions. [2021-06-05 05:43:06,879 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 14385 transitions. Word has length 55 [2021-06-05 05:43:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:06,879 INFO L482 AbstractCegarLoop]: Abstraction has 5893 states and 14385 transitions. [2021-06-05 05:43:06,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 14385 transitions. [2021-06-05 05:43:06,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:06,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:06,883 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:07,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:07,097 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 79 times [2021-06-05 05:43:07,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:07,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586531209] [2021-06-05 05:43:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:07,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586531209] [2021-06-05 05:43:07,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586531209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103704316] [2021-06-05 05:43:07,287 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:43:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:08,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103704316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:08,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:08,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-06-05 05:43:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860330748] [2021-06-05 05:43:08,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:43:08,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:08,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:43:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:43:08,033 INFO L87 Difference]: Start difference. First operand 5893 states and 14385 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:12,410 INFO L93 Difference]: Finished difference Result 8165 states and 19006 transitions. [2021-06-05 05:43:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:43:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:12,417 INFO L225 Difference]: With dead ends: 8165 [2021-06-05 05:43:12,418 INFO L226 Difference]: Without dead ends: 8161 [2021-06-05 05:43:12,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 2883.5ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 05:43:12,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-06-05 05:43:12,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 5628. [2021-06-05 05:43:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 2.438955038208637) internal successors, (13724), 5627 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 13724 transitions. [2021-06-05 05:43:12,477 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 13724 transitions. Word has length 55 [2021-06-05 05:43:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:12,477 INFO L482 AbstractCegarLoop]: Abstraction has 5628 states and 13724 transitions. [2021-06-05 05:43:12,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 13724 transitions. [2021-06-05 05:43:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:12,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:12,480 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:12,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:12,681 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 80 times [2021-06-05 05:43:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:12,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940101564] [2021-06-05 05:43:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:12,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:12,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940101564] [2021-06-05 05:43:12,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940101564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:12,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191779561] [2021-06-05 05:43:12,869 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:12,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:12,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:43:12,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:13,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191779561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:13,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:13,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-06-05 05:43:13,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558215392] [2021-06-05 05:43:13,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:43:13,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:43:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:43:13,484 INFO L87 Difference]: Start difference. First operand 5628 states and 13724 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:20,368 INFO L93 Difference]: Finished difference Result 12946 states and 29248 transitions. [2021-06-05 05:43:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-05 05:43:20,369 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:20,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:20,381 INFO L225 Difference]: With dead ends: 12946 [2021-06-05 05:43:20,381 INFO L226 Difference]: Without dead ends: 12898 [2021-06-05 05:43:20,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 4061.7ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-06-05 05:43:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2021-06-05 05:43:20,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 5600. [2021-06-05 05:43:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.4365065190212536) internal successors, (13642), 5599 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:20,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 13642 transitions. [2021-06-05 05:43:20,468 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 13642 transitions. Word has length 55 [2021-06-05 05:43:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:20,468 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 13642 transitions. [2021-06-05 05:43:20,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 13642 transitions. [2021-06-05 05:43:20,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:20,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:20,471 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:20,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 05:43:20,672 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:20,672 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 81 times [2021-06-05 05:43:20,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:20,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214156818] [2021-06-05 05:43:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:20,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:20,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214156818] [2021-06-05 05:43:20,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214156818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:20,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738144057] [2021-06-05 05:43:20,867 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:20,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 05:43:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:43:20,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:21,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738144057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:21,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:21,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-06-05 05:43:21,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823390002] [2021-06-05 05:43:21,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:43:21,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:21,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:43:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:43:21,462 INFO L87 Difference]: Start difference. First operand 5600 states and 13642 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:28,032 INFO L93 Difference]: Finished difference Result 14970 states and 33594 transitions. [2021-06-05 05:43:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-05 05:43:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:28,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:28,047 INFO L225 Difference]: With dead ends: 14970 [2021-06-05 05:43:28,047 INFO L226 Difference]: Without dead ends: 14892 [2021-06-05 05:43:28,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16664 ImplicationChecksByTransitivity, 4670.7ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-06-05 05:43:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-06-05 05:43:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 5524. [2021-06-05 05:43:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4349085641861308) internal successors, (13448), 5523 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13448 transitions. [2021-06-05 05:43:28,138 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13448 transitions. Word has length 55 [2021-06-05 05:43:28,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:28,138 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13448 transitions. [2021-06-05 05:43:28,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13448 transitions. [2021-06-05 05:43:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:28,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:28,142 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:28,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:28,345 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 82 times [2021-06-05 05:43:28,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:28,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226918460] [2021-06-05 05:43:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:28,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226918460] [2021-06-05 05:43:28,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226918460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637206349] [2021-06-05 05:43:28,535 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:28,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:43:28,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:43:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:29,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637206349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:29,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:29,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-06-05 05:43:29,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866779553] [2021-06-05 05:43:29,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:43:29,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:29,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:43:29,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:43:29,128 INFO L87 Difference]: Start difference. First operand 5524 states and 13448 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:35,048 INFO L93 Difference]: Finished difference Result 18186 states and 40794 transitions. [2021-06-05 05:43:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-05 05:43:35,049 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:35,066 INFO L225 Difference]: With dead ends: 18186 [2021-06-05 05:43:35,066 INFO L226 Difference]: Without dead ends: 18072 [2021-06-05 05:43:35,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15389 ImplicationChecksByTransitivity, 4242.6ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-06-05 05:43:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18072 states. [2021-06-05 05:43:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18072 to 5412. [2021-06-05 05:43:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.4405839955645905) internal successors, (13206), 5411 states have internal predecessors, (13206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 13206 transitions. [2021-06-05 05:43:35,165 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 13206 transitions. Word has length 55 [2021-06-05 05:43:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:35,165 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 13206 transitions. [2021-06-05 05:43:35,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 13206 transitions. [2021-06-05 05:43:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:35,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:35,168 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:35,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 05:43:35,369 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:35,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:35,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 83 times [2021-06-05 05:43:35,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:35,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123241618] [2021-06-05 05:43:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:35,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123241618] [2021-06-05 05:43:35,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123241618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030665146] [2021-06-05 05:43:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:35,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 05:43:35,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:43:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:36,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030665146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:36,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:36,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 47 [2021-06-05 05:43:36,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390120526] [2021-06-05 05:43:36,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 05:43:36,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:36,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 05:43:36,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:43:36,176 INFO L87 Difference]: Start difference. First operand 5412 states and 13206 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:40,155 INFO L93 Difference]: Finished difference Result 19113 states and 42468 transitions. [2021-06-05 05:43:40,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 05:43:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:40,174 INFO L225 Difference]: With dead ends: 19113 [2021-06-05 05:43:40,174 INFO L226 Difference]: Without dead ends: 18873 [2021-06-05 05:43:40,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 3254.6ms TimeCoverageRelationStatistics Valid=4545, Invalid=24867, Unknown=0, NotChecked=0, Total=29412 [2021-06-05 05:43:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2021-06-05 05:43:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 5360. [2021-06-05 05:43:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 2.4448591155066244) internal successors, (13102), 5359 states have internal predecessors, (13102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 13102 transitions. [2021-06-05 05:43:40,277 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 13102 transitions. Word has length 55 [2021-06-05 05:43:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:40,277 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 13102 transitions. [2021-06-05 05:43:40,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 13102 transitions. [2021-06-05 05:43:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:40,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:40,280 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:40,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 05:43:40,481 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:40,481 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 84 times [2021-06-05 05:43:40,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:40,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108155376] [2021-06-05 05:43:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:40,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108155376] [2021-06-05 05:43:40,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108155376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643605797] [2021-06-05 05:43:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:40,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 05:43:40,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:43:40,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:41,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643605797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:41,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:41,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-06-05 05:43:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146641898] [2021-06-05 05:43:41,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:43:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:43:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:43:41,265 INFO L87 Difference]: Start difference. First operand 5360 states and 13102 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:45,614 INFO L93 Difference]: Finished difference Result 18758 states and 41177 transitions. [2021-06-05 05:43:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 05:43:45,614 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:45,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:45,632 INFO L225 Difference]: With dead ends: 18758 [2021-06-05 05:43:45,632 INFO L226 Difference]: Without dead ends: 18353 [2021-06-05 05:43:45,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14275 ImplicationChecksByTransitivity, 3599.1ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-06-05 05:43:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-06-05 05:43:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5380. [2021-06-05 05:43:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 2.443205056701989) internal successors, (13142), 5379 states have internal predecessors, (13142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 13142 transitions. [2021-06-05 05:43:45,728 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 13142 transitions. Word has length 55 [2021-06-05 05:43:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:45,728 INFO L482 AbstractCegarLoop]: Abstraction has 5380 states and 13142 transitions. [2021-06-05 05:43:45,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 13142 transitions. [2021-06-05 05:43:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:45,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:45,731 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:45,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 05:43:45,932 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:45,932 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 85 times [2021-06-05 05:43:45,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:45,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614420222] [2021-06-05 05:43:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:46,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:46,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614420222] [2021-06-05 05:43:46,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614420222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:46,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194222757] [2021-06-05 05:43:46,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:46,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:43:46,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:46,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194222757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:46,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:46,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-06-05 05:43:46,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243415731] [2021-06-05 05:43:46,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:43:46,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:43:46,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:43:46,727 INFO L87 Difference]: Start difference. First operand 5380 states and 13142 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:50,961 INFO L93 Difference]: Finished difference Result 18854 states and 41231 transitions. [2021-06-05 05:43:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-05 05:43:50,961 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:50,978 INFO L225 Difference]: With dead ends: 18854 [2021-06-05 05:43:50,978 INFO L226 Difference]: Without dead ends: 18251 [2021-06-05 05:43:50,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 3634.2ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-06-05 05:43:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18251 states. [2021-06-05 05:43:51,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18251 to 5392. [2021-06-05 05:43:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 2.4422185123353737) internal successors, (13166), 5391 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 13166 transitions. [2021-06-05 05:43:51,078 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 13166 transitions. Word has length 55 [2021-06-05 05:43:51,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:51,079 INFO L482 AbstractCegarLoop]: Abstraction has 5392 states and 13166 transitions. [2021-06-05 05:43:51,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 13166 transitions. [2021-06-05 05:43:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:51,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:51,082 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:51,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:51,297 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 86 times [2021-06-05 05:43:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:51,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562603480] [2021-06-05 05:43:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:51,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:51,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562603480] [2021-06-05 05:43:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562603480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937976854] [2021-06-05 05:43:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:51,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:43:51,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:51,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:43:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:52,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937976854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:52,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:52,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-05 05:43:52,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718201250] [2021-06-05 05:43:52,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 05:43:52,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 05:43:52,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:43:52,161 INFO L87 Difference]: Start difference. First operand 5392 states and 13166 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:56,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:43:56,491 INFO L93 Difference]: Finished difference Result 15764 states and 34786 transitions. [2021-06-05 05:43:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 05:43:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:43:56,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:43:56,506 INFO L225 Difference]: With dead ends: 15764 [2021-06-05 05:43:56,507 INFO L226 Difference]: Without dead ends: 14963 [2021-06-05 05:43:56,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 3771.4ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-06-05 05:43:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14963 states. [2021-06-05 05:43:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14963 to 5551. [2021-06-05 05:43:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 2.4086486486486485) internal successors, (13368), 5550 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 13368 transitions. [2021-06-05 05:43:56,603 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 13368 transitions. Word has length 55 [2021-06-05 05:43:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:43:56,603 INFO L482 AbstractCegarLoop]: Abstraction has 5551 states and 13368 transitions. [2021-06-05 05:43:56,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:43:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 13368 transitions. [2021-06-05 05:43:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 05:43:56,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:43:56,606 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:43:56,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 05:43:56,807 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:43:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:43:56,807 INFO L82 PathProgramCache]: Analyzing trace with hash 335036743, now seen corresponding path program 87 times [2021-06-05 05:43:56,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:43:56,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042219217] [2021-06-05 05:43:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:43:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:43:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:56,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:43:56,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042219217] [2021-06-05 05:43:56,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042219217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:56,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227535495] [2021-06-05 05:43:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:43:56,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 05:43:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:43:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 05:43:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:43:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:43:57,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227535495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:43:57,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:43:57,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-06-05 05:43:57,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009633175] [2021-06-05 05:43:57,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:43:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:43:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:43:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:43:57,494 INFO L87 Difference]: Start difference. First operand 5551 states and 13368 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:04,586 INFO L93 Difference]: Finished difference Result 11259 states and 25238 transitions. [2021-06-05 05:44:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-05 05:44:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 05:44:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:04,596 INFO L225 Difference]: With dead ends: 11259 [2021-06-05 05:44:04,596 INFO L226 Difference]: Without dead ends: 11255 [2021-06-05 05:44:04,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32929 ImplicationChecksByTransitivity, 6388.0ms TimeCoverageRelationStatistics Valid=15649, Invalid=58063, Unknown=0, NotChecked=0, Total=73712 [2021-06-05 05:44:04,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2021-06-05 05:44:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 5626. [2021-06-05 05:44:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 2.4208) internal successors, (13617), 5625 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 13617 transitions. [2021-06-05 05:44:04,676 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 13617 transitions. Word has length 55 [2021-06-05 05:44:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:04,676 INFO L482 AbstractCegarLoop]: Abstraction has 5626 states and 13617 transitions. [2021-06-05 05:44:04,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 13617 transitions. [2021-06-05 05:44:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 05:44:04,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:04,680 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:04,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 05:44:04,880 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:04,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:04,880 INFO L82 PathProgramCache]: Analyzing trace with hash 317372549, now seen corresponding path program 88 times [2021-06-05 05:44:04,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:04,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447201094] [2021-06-05 05:44:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:05,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447201094] [2021-06-05 05:44:05,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447201094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421851958] [2021-06-05 05:44:05,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:05,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:05,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:05,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:44:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:05,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421851958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:05,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:05,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-06-05 05:44:05,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230064976] [2021-06-05 05:44:05,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 05:44:05,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:05,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 05:44:05,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:44:05,788 INFO L87 Difference]: Start difference. First operand 5626 states and 13617 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:10,870 INFO L93 Difference]: Finished difference Result 7916 states and 18052 transitions. [2021-06-05 05:44:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-06-05 05:44:10,870 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 05:44:10,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:10,876 INFO L225 Difference]: With dead ends: 7916 [2021-06-05 05:44:10,876 INFO L226 Difference]: Without dead ends: 7538 [2021-06-05 05:44:10,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 4557.9ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-06-05 05:44:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-06-05 05:44:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 5623. [2021-06-05 05:44:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.418000711490573) internal successors, (13594), 5622 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13594 transitions. [2021-06-05 05:44:10,933 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13594 transitions. Word has length 57 [2021-06-05 05:44:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:10,933 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13594 transitions. [2021-06-05 05:44:10,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13594 transitions. [2021-06-05 05:44:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 05:44:10,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:10,938 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:11,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:11,141 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1117608869, now seen corresponding path program 89 times [2021-06-05 05:44:11,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:11,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303498557] [2021-06-05 05:44:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:11,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:11,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303498557] [2021-06-05 05:44:11,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303498557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:11,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118725833] [2021-06-05 05:44:11,282 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:11,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 05:44:11,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:44:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118725833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-06-05 05:44:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144686880] [2021-06-05 05:44:11,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:44:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:44:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:44:11,889 INFO L87 Difference]: Start difference. First operand 5623 states and 13594 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:20,044 INFO L93 Difference]: Finished difference Result 7450 states and 17196 transitions. [2021-06-05 05:44:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-06-05 05:44:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 05:44:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:20,050 INFO L225 Difference]: With dead ends: 7450 [2021-06-05 05:44:20,050 INFO L226 Difference]: Without dead ends: 7446 [2021-06-05 05:44:20,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46028 ImplicationChecksByTransitivity, 7632.4ms TimeCoverageRelationStatistics Valid=21517, Invalid=78023, Unknown=0, NotChecked=0, Total=99540 [2021-06-05 05:44:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2021-06-05 05:44:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 5623. [2021-06-05 05:44:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.4178228388473855) internal successors, (13593), 5622 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13593 transitions. [2021-06-05 05:44:20,109 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13593 transitions. Word has length 57 [2021-06-05 05:44:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:20,109 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13593 transitions. [2021-06-05 05:44:20,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13593 transitions. [2021-06-05 05:44:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:44:20,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:20,112 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:20,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:20,319 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:20,320 INFO L82 PathProgramCache]: Analyzing trace with hash -870344253, now seen corresponding path program 90 times [2021-06-05 05:44:20,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:20,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624724146] [2021-06-05 05:44:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:20,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:20,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624724146] [2021-06-05 05:44:20,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624724146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:20,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746703705] [2021-06-05 05:44:20,438 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:20,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 05:44:20,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:44:20,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:20,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746703705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:20,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:20,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-06-05 05:44:20,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344478521] [2021-06-05 05:44:20,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:44:20,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:20,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:44:20,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:44:20,710 INFO L87 Difference]: Start difference. First operand 5623 states and 13593 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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) [2021-06-05 05:44:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:20,958 INFO L93 Difference]: Finished difference Result 7171 states and 17073 transitions. [2021-06-05 05:44:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:44:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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 59 [2021-06-05 05:44:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:20,965 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 05:44:20,966 INFO L226 Difference]: Without dead ends: 7081 [2021-06-05 05:44:20,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:44:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-06-05 05:44:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6483. [2021-06-05 05:44:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 2.4438444924406046) internal successors, (15841), 6482 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 15841 transitions. [2021-06-05 05:44:21,054 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 15841 transitions. Word has length 59 [2021-06-05 05:44:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:21,054 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 15841 transitions. [2021-06-05 05:44:21,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 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) [2021-06-05 05:44:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 15841 transitions. [2021-06-05 05:44:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:44:21,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:21,059 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:21,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:21,259 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1705145369, now seen corresponding path program 91 times [2021-06-05 05:44:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:21,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624293856] [2021-06-05 05:44:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:21,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624293856] [2021-06-05 05:44:21,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624293856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:21,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565735107] [2021-06-05 05:44:21,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:21,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:44:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:22,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565735107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:22,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:22,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2021-06-05 05:44:22,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971513908] [2021-06-05 05:44:22,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:44:22,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:44:22,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:44:22,197 INFO L87 Difference]: Start difference. First operand 6483 states and 15841 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:28,115 INFO L93 Difference]: Finished difference Result 12343 states and 28098 transitions. [2021-06-05 05:44:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 05:44:28,116 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:44:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:28,127 INFO L225 Difference]: With dead ends: 12343 [2021-06-05 05:44:28,127 INFO L226 Difference]: Without dead ends: 12319 [2021-06-05 05:44:28,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10309 ImplicationChecksByTransitivity, 3837.4ms TimeCoverageRelationStatistics Valid=2449, Invalid=28351, Unknown=0, NotChecked=0, Total=30800 [2021-06-05 05:44:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2021-06-05 05:44:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 6755. [2021-06-05 05:44:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.447290494521765) internal successors, (16529), 6754 states have internal predecessors, (16529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 16529 transitions. [2021-06-05 05:44:28,231 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 16529 transitions. Word has length 59 [2021-06-05 05:44:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:28,231 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 16529 transitions. [2021-06-05 05:44:28,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 16529 transitions. [2021-06-05 05:44:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:44:28,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:28,236 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:28,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 05:44:28,449 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash 974779459, now seen corresponding path program 92 times [2021-06-05 05:44:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:28,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763839899] [2021-06-05 05:44:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:28,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763839899] [2021-06-05 05:44:28,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763839899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317362152] [2021-06-05 05:44:28,626 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:28,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:44:28,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:28,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:44:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:29,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317362152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:29,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:29,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-06-05 05:44:29,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433710062] [2021-06-05 05:44:29,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:44:29,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:44:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:44:29,359 INFO L87 Difference]: Start difference. First operand 6755 states and 16529 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:34,146 INFO L93 Difference]: Finished difference Result 9269 states and 21605 transitions. [2021-06-05 05:44:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 05:44:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:44:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:34,154 INFO L225 Difference]: With dead ends: 9269 [2021-06-05 05:44:34,154 INFO L226 Difference]: Without dead ends: 9265 [2021-06-05 05:44:34,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 3155.7ms TimeCoverageRelationStatistics Valid=1733, Invalid=19147, Unknown=0, NotChecked=0, Total=20880 [2021-06-05 05:44:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-06-05 05:44:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 6473. [2021-06-05 05:44:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6473 states, 6472 states have (on average 2.4456118665018542) internal successors, (15828), 6472 states have internal predecessors, (15828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6473 states to 6473 states and 15828 transitions. [2021-06-05 05:44:34,229 INFO L78 Accepts]: Start accepts. Automaton has 6473 states and 15828 transitions. Word has length 59 [2021-06-05 05:44:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:34,229 INFO L482 AbstractCegarLoop]: Abstraction has 6473 states and 15828 transitions. [2021-06-05 05:44:34,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6473 states and 15828 transitions. [2021-06-05 05:44:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:44:34,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:34,233 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:34,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:34,434 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1018344093, now seen corresponding path program 93 times [2021-06-05 05:44:34,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:34,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329922413] [2021-06-05 05:44:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:34,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:34,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329922413] [2021-06-05 05:44:34,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329922413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:34,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663356615] [2021-06-05 05:44:34,634 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:34,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 05:44:34,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:34,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:44:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663356615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:35,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:35,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-06-05 05:44:35,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557074147] [2021-06-05 05:44:35,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:44:35,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:44:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:44:35,344 INFO L87 Difference]: Start difference. First operand 6473 states and 15828 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:43,361 INFO L93 Difference]: Finished difference Result 14464 states and 32612 transitions. [2021-06-05 05:44:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-05 05:44:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:44:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:43,375 INFO L225 Difference]: With dead ends: 14464 [2021-06-05 05:44:43,375 INFO L226 Difference]: Without dead ends: 14416 [2021-06-05 05:44:43,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17435 ImplicationChecksByTransitivity, 4889.9ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-06-05 05:44:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14416 states. [2021-06-05 05:44:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14416 to 6523. [2021-06-05 05:44:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.4449555351119288) internal successors, (15946), 6522 states have internal predecessors, (15946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 15946 transitions. [2021-06-05 05:44:43,475 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 15946 transitions. Word has length 59 [2021-06-05 05:44:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:43,475 INFO L482 AbstractCegarLoop]: Abstraction has 6523 states and 15946 transitions. [2021-06-05 05:44:43,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 15946 transitions. [2021-06-05 05:44:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:44:43,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:43,479 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:43,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:43,680 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:43,680 INFO L82 PathProgramCache]: Analyzing trace with hash -194027999, now seen corresponding path program 94 times [2021-06-05 05:44:43,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:43,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623751948] [2021-06-05 05:44:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:43,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:43,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623751948] [2021-06-05 05:44:43,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623751948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:43,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193580467] [2021-06-05 05:44:43,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:43,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:44:43,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:43,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:44:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:44,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193580467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:44,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:44,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-06-05 05:44:44,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003910400] [2021-06-05 05:44:44,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 05:44:44,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 05:44:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:44:44,566 INFO L87 Difference]: Start difference. First operand 6523 states and 15946 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:44:52,328 INFO L93 Difference]: Finished difference Result 17210 states and 38597 transitions. [2021-06-05 05:44:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-06-05 05:44:52,329 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:44:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:44:52,345 INFO L225 Difference]: With dead ends: 17210 [2021-06-05 05:44:52,345 INFO L226 Difference]: Without dead ends: 17132 [2021-06-05 05:44:52,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22220 ImplicationChecksByTransitivity, 5585.5ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-06-05 05:44:52,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2021-06-05 05:44:52,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 6424. [2021-06-05 05:44:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 6423 states have (on average 2.4406040790907677) internal successors, (15676), 6423 states have internal predecessors, (15676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 15676 transitions. [2021-06-05 05:44:52,455 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 15676 transitions. Word has length 59 [2021-06-05 05:44:52,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:44:52,455 INFO L482 AbstractCegarLoop]: Abstraction has 6424 states and 15676 transitions. [2021-06-05 05:44:52,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:44:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 15676 transitions. [2021-06-05 05:44:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:44:52,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:44:52,458 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:44:52,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:52,659 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:44:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:44:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1178744485, now seen corresponding path program 95 times [2021-06-05 05:44:52,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:44:52,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911329641] [2021-06-05 05:44:52,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:44:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:44:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:52,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:44:52,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911329641] [2021-06-05 05:44:52,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911329641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:52,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879746962] [2021-06-05 05:44:52,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:44:52,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 05:44:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:44:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:44:52,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:44:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:44:53,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879746962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:44:53,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:44:53,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2021-06-05 05:44:53,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20762975] [2021-06-05 05:44:53,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 05:44:53,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:44:53,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 05:44:53,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:44:53,580 INFO L87 Difference]: Start difference. First operand 6424 states and 15676 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:01,209 INFO L93 Difference]: Finished difference Result 19569 states and 43599 transitions. [2021-06-05 05:45:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-06-05 05:45:01,210 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:45:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:01,228 INFO L225 Difference]: With dead ends: 19569 [2021-06-05 05:45:01,228 INFO L226 Difference]: Without dead ends: 19455 [2021-06-05 05:45:01,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22978 ImplicationChecksByTransitivity, 5544.4ms TimeCoverageRelationStatistics Valid=7134, Invalid=52646, Unknown=0, NotChecked=0, Total=59780 [2021-06-05 05:45:01,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19455 states. [2021-06-05 05:45:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19455 to 6298. [2021-06-05 05:45:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6298 states, 6297 states have (on average 2.4427505161187866) internal successors, (15382), 6297 states have internal predecessors, (15382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 15382 transitions. [2021-06-05 05:45:01,348 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 15382 transitions. Word has length 59 [2021-06-05 05:45:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:01,348 INFO L482 AbstractCegarLoop]: Abstraction has 6298 states and 15382 transitions. [2021-06-05 05:45:01,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 15382 transitions. [2021-06-05 05:45:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:45:01,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:01,352 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:01,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:01,552 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1738865705, now seen corresponding path program 96 times [2021-06-05 05:45:01,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:01,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912633317] [2021-06-05 05:45:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:01,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:01,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912633317] [2021-06-05 05:45:01,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912633317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:01,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269729907] [2021-06-05 05:45:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:01,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 05:45:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:45:01,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:02,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269729907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:02,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:02,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-06-05 05:45:02,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518131171] [2021-06-05 05:45:02,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:45:02,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:02,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:45:02,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:45:02,479 INFO L87 Difference]: Start difference. First operand 6298 states and 15382 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:08,545 INFO L93 Difference]: Finished difference Result 22986 states and 51049 transitions. [2021-06-05 05:45:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 05:45:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:45:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:08,568 INFO L225 Difference]: With dead ends: 22986 [2021-06-05 05:45:08,569 INFO L226 Difference]: Without dead ends: 22683 [2021-06-05 05:45:08,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 4689.6ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-06-05 05:45:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22683 states. [2021-06-05 05:45:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22683 to 5441. [2021-06-05 05:45:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 2.4193014705882354) internal successors, (13161), 5440 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 13161 transitions. [2021-06-05 05:45:08,710 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 13161 transitions. Word has length 59 [2021-06-05 05:45:08,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:08,710 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 13161 transitions. [2021-06-05 05:45:08,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 13161 transitions. [2021-06-05 05:45:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:45:08,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:08,714 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:08,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-05 05:45:08,915 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2044629331, now seen corresponding path program 97 times [2021-06-05 05:45:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:08,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000813877] [2021-06-05 05:45:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:09,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000813877] [2021-06-05 05:45:09,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000813877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:09,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627335607] [2021-06-05 05:45:09,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:45:09,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:09,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627335607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:09,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:09,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-06-05 05:45:09,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860047735] [2021-06-05 05:45:09,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:45:09,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:45:09,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:45:09,878 INFO L87 Difference]: Start difference. First operand 5441 states and 13161 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:14,784 INFO L93 Difference]: Finished difference Result 22758 states and 49665 transitions. [2021-06-05 05:45:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-05 05:45:14,784 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:45:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:14,808 INFO L225 Difference]: With dead ends: 22758 [2021-06-05 05:45:14,808 INFO L226 Difference]: Without dead ends: 22332 [2021-06-05 05:45:14,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14328 ImplicationChecksByTransitivity, 3979.3ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-06-05 05:45:14,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2021-06-05 05:45:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 5465. [2021-06-05 05:45:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5464 states have (on average 2.417459736456808) internal successors, (13209), 5464 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 13209 transitions. [2021-06-05 05:45:14,956 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 13209 transitions. Word has length 59 [2021-06-05 05:45:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:14,956 INFO L482 AbstractCegarLoop]: Abstraction has 5465 states and 13209 transitions. [2021-06-05 05:45:14,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 13209 transitions. [2021-06-05 05:45:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:45:14,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:14,960 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:15,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:15,160 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:15,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1129401905, now seen corresponding path program 98 times [2021-06-05 05:45:15,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:15,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165345890] [2021-06-05 05:45:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:15,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:15,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165345890] [2021-06-05 05:45:15,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165345890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:15,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593282586] [2021-06-05 05:45:15,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:15,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:45:15,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:45:15,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:16,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593282586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:16,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:16,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-06-05 05:45:16,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652912544] [2021-06-05 05:45:16,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:45:16,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:16,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:45:16,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:45:16,164 INFO L87 Difference]: Start difference. First operand 5465 states and 13209 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:21,460 INFO L93 Difference]: Finished difference Result 22040 states and 47868 transitions. [2021-06-05 05:45:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-06-05 05:45:21,461 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:45:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:21,480 INFO L225 Difference]: With dead ends: 22040 [2021-06-05 05:45:21,480 INFO L226 Difference]: Without dead ends: 21506 [2021-06-05 05:45:21,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19899 ImplicationChecksByTransitivity, 4576.6ms TimeCoverageRelationStatistics Valid=8757, Invalid=41195, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 05:45:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21506 states. [2021-06-05 05:45:21,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21506 to 5481. [2021-06-05 05:45:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.4162408759124085) internal successors, (13241), 5480 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 13241 transitions. [2021-06-05 05:45:21,598 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 13241 transitions. Word has length 59 [2021-06-05 05:45:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:21,598 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 13241 transitions. [2021-06-05 05:45:21,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 13241 transitions. [2021-06-05 05:45:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:45:21,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:21,602 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:21,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:21,802 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 819878581, now seen corresponding path program 99 times [2021-06-05 05:45:21,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:21,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461740344] [2021-06-05 05:45:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:22,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461740344] [2021-06-05 05:45:22,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461740344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:22,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227808866] [2021-06-05 05:45:22,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:22,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 05:45:22,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:45:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:22,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227808866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:22,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:22,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-06-05 05:45:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493385349] [2021-06-05 05:45:22,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 05:45:22,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:22,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 05:45:22,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:45:22,771 INFO L87 Difference]: Start difference. First operand 5481 states and 13241 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:28,715 INFO L93 Difference]: Finished difference Result 19025 states and 40337 transitions. [2021-06-05 05:45:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-06-05 05:45:28,715 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:45:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:28,733 INFO L225 Difference]: With dead ends: 19025 [2021-06-05 05:45:28,733 INFO L226 Difference]: Without dead ends: 18353 [2021-06-05 05:45:28,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23147 ImplicationChecksByTransitivity, 5081.1ms TimeCoverageRelationStatistics Valid=11132, Invalid=46228, Unknown=0, NotChecked=0, Total=57360 [2021-06-05 05:45:28,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-06-05 05:45:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5493. [2021-06-05 05:45:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.415331391114348) internal successors, (13265), 5492 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 13265 transitions. [2021-06-05 05:45:28,843 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 13265 transitions. Word has length 59 [2021-06-05 05:45:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:28,843 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 13265 transitions. [2021-06-05 05:45:28,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 13265 transitions. [2021-06-05 05:45:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:45:28,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:28,847 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:29,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 05:45:29,047 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:29,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:29,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1283609657, now seen corresponding path program 100 times [2021-06-05 05:45:29,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:29,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453790479] [2021-06-05 05:45:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:29,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:29,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453790479] [2021-06-05 05:45:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453790479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:29,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617206663] [2021-06-05 05:45:29,427 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:29,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:45:29,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:29,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 05:45:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:30,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617206663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:30,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:30,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-05 05:45:30,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616460445] [2021-06-05 05:45:30,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 05:45:30,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 05:45:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:45:30,089 INFO L87 Difference]: Start difference. First operand 5493 states and 13265 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:35,465 INFO L93 Difference]: Finished difference Result 17796 states and 38889 transitions. [2021-06-05 05:45:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-05 05:45:35,465 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:45:35,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:35,482 INFO L225 Difference]: With dead ends: 17796 [2021-06-05 05:45:35,482 INFO L226 Difference]: Without dead ends: 16833 [2021-06-05 05:45:35,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18178 ImplicationChecksByTransitivity, 4878.2ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-06-05 05:45:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-06-05 05:45:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 5659. [2021-06-05 05:45:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.376458112407211) internal successors, (13446), 5658 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 13446 transitions. [2021-06-05 05:45:35,597 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 13446 transitions. Word has length 59 [2021-06-05 05:45:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:35,597 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 13446 transitions. [2021-06-05 05:45:35,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 13446 transitions. [2021-06-05 05:45:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 05:45:35,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:35,601 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:35,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 05:45:35,802 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash -994946229, now seen corresponding path program 101 times [2021-06-05 05:45:35,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:35,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363470691] [2021-06-05 05:45:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:35,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:35,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363470691] [2021-06-05 05:45:35,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363470691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:35,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760623051] [2021-06-05 05:45:35,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:35,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 05:45:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:35,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:45:35,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:36,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760623051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:36,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:36,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-06-05 05:45:36,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000536241] [2021-06-05 05:45:36,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:45:36,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:45:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:45:36,615 INFO L87 Difference]: Start difference. First operand 5659 states and 13446 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:45,569 INFO L93 Difference]: Finished difference Result 12575 states and 27866 transitions. [2021-06-05 05:45:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-06-05 05:45:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 05:45:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:45,581 INFO L225 Difference]: With dead ends: 12575 [2021-06-05 05:45:45,581 INFO L226 Difference]: Without dead ends: 12571 [2021-06-05 05:45:45,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 8234.2ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-06-05 05:45:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12571 states. [2021-06-05 05:45:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12571 to 5767. [2021-06-05 05:45:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 2.392126257370794) internal successors, (13793), 5766 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 13793 transitions. [2021-06-05 05:45:45,686 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 13793 transitions. Word has length 59 [2021-06-05 05:45:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:45,686 INFO L482 AbstractCegarLoop]: Abstraction has 5767 states and 13793 transitions. [2021-06-05 05:45:45,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 13793 transitions. [2021-06-05 05:45:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 05:45:45,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:45,690 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:45,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:45,906 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash -192628671, now seen corresponding path program 102 times [2021-06-05 05:45:45,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:45,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462267249] [2021-06-05 05:45:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:46,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:46,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462267249] [2021-06-05 05:45:46,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462267249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:46,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543824876] [2021-06-05 05:45:46,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:46,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 05:45:46,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:45:46,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:45:46,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:46,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543824876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:46,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:46,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-06-05 05:45:46,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381065338] [2021-06-05 05:45:46,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-06-05 05:45:46,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:46,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-06-05 05:45:46,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:45:46,965 INFO L87 Difference]: Start difference. First operand 5767 states and 13793 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:53,100 INFO L93 Difference]: Finished difference Result 8440 states and 18980 transitions. [2021-06-05 05:45:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 05:45:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 05:45:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:53,106 INFO L225 Difference]: With dead ends: 8440 [2021-06-05 05:45:53,107 INFO L226 Difference]: Without dead ends: 7990 [2021-06-05 05:45:53,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24730 ImplicationChecksByTransitivity, 5543.0ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-06-05 05:45:53,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-05 05:45:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5762. [2021-06-05 05:45:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.389168547127235) internal successors, (13764), 5761 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13764 transitions. [2021-06-05 05:45:53,165 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13764 transitions. Word has length 61 [2021-06-05 05:45:53,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:53,166 INFO L482 AbstractCegarLoop]: Abstraction has 5762 states and 13764 transitions. [2021-06-05 05:45:53,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13764 transitions. [2021-06-05 05:45:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 05:45:53,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:53,169 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:53,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:53,370 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash 559420251, now seen corresponding path program 103 times [2021-06-05 05:45:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:53,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458708094] [2021-06-05 05:45:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:53,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:45:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458708094] [2021-06-05 05:45:53,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458708094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13441426] [2021-06-05 05:45:53,501 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:45:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:45:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:45:53,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:45:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:45:54,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13441426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:45:54,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:45:54,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28] total 42 [2021-06-05 05:45:54,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486254642] [2021-06-05 05:45:54,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:45:54,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:45:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:45:54,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:45:54,154 INFO L87 Difference]: Start difference. First operand 5762 states and 13764 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:59,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:45:59,583 INFO L93 Difference]: Finished difference Result 7544 states and 17272 transitions. [2021-06-05 05:45:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 05:45:59,584 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 05:45:59,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:45:59,590 INFO L225 Difference]: With dead ends: 7544 [2021-06-05 05:45:59,590 INFO L226 Difference]: Without dead ends: 7540 [2021-06-05 05:45:59,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23464 ImplicationChecksByTransitivity, 5159.8ms TimeCoverageRelationStatistics Valid=12941, Invalid=42519, Unknown=0, NotChecked=0, Total=55460 [2021-06-05 05:45:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2021-06-05 05:45:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 5718. [2021-06-05 05:45:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.391988805317474) internal successors, (13675), 5717 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 13675 transitions. [2021-06-05 05:45:59,659 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 13675 transitions. Word has length 61 [2021-06-05 05:45:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:45:59,659 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 13675 transitions. [2021-06-05 05:45:59,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:45:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 13675 transitions. [2021-06-05 05:45:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 05:45:59,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:45:59,662 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:45:59,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 05:45:59,863 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:45:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:45:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1867745943, now seen corresponding path program 104 times [2021-06-05 05:45:59,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:45:59,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878592398] [2021-06-05 05:45:59,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:45:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:46:00,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:00,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878592398] [2021-06-05 05:46:00,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878592398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:00,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460904184] [2021-06-05 05:46:00,056 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:00,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:00,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:00,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 05:46:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460904184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-06-05 05:46:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833186401] [2021-06-05 05:46:00,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 05:46:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 05:46:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:46:00,666 INFO L87 Difference]: Start difference. First operand 5718 states and 13675 transitions. Second operand has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:03,678 INFO L93 Difference]: Finished difference Result 12090 states and 27556 transitions. [2021-06-05 05:46:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 05:46:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 05:46:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:03,691 INFO L225 Difference]: With dead ends: 12090 [2021-06-05 05:46:03,691 INFO L226 Difference]: Without dead ends: 12081 [2021-06-05 05:46:03,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5212 ImplicationChecksByTransitivity, 2485.0ms TimeCoverageRelationStatistics Valid=2862, Invalid=14694, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 05:46:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-06-05 05:46:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 7235. [2021-06-05 05:46:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 2.380702239424938) internal successors, (17222), 7234 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 17222 transitions. [2021-06-05 05:46:03,789 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 17222 transitions. Word has length 61 [2021-06-05 05:46:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:03,789 INFO L482 AbstractCegarLoop]: Abstraction has 7235 states and 17222 transitions. [2021-06-05 05:46:03,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 17222 transitions. [2021-06-05 05:46:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:46:03,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:03,795 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:03,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 05:46:03,995 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1355244929, now seen corresponding path program 105 times [2021-06-05 05:46:03,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:03,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285526838] [2021-06-05 05:46:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:04,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:04,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285526838] [2021-06-05 05:46:04,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285526838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:04,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251876506] [2021-06-05 05:46:04,123 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:04,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 05:46:04,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:46:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 25 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:04,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251876506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:04,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:04,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 23 [2021-06-05 05:46:04,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051437609] [2021-06-05 05:46:04,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:46:04,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:04,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:46:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:46:04,347 INFO L87 Difference]: Start difference. First operand 7235 states and 17222 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:04,675 INFO L93 Difference]: Finished difference Result 9195 states and 21714 transitions. [2021-06-05 05:46:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:46:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:46:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:04,685 INFO L225 Difference]: With dead ends: 9195 [2021-06-05 05:46:04,685 INFO L226 Difference]: Without dead ends: 9102 [2021-06-05 05:46:04,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:46:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9102 states. [2021-06-05 05:46:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9102 to 8338. [2021-06-05 05:46:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 2.408900083963056) internal successors, (20083), 8337 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 20083 transitions. [2021-06-05 05:46:04,785 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 20083 transitions. Word has length 63 [2021-06-05 05:46:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:04,785 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 20083 transitions. [2021-06-05 05:46:04,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:04,785 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 20083 transitions. [2021-06-05 05:46:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:46:04,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:04,791 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:04,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:04,992 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:04,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2045530241, now seen corresponding path program 106 times [2021-06-05 05:46:04,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:04,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075944836] [2021-06-05 05:46:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:05,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:05,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075944836] [2021-06-05 05:46:05,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075944836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:05,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309288463] [2021-06-05 05:46:05,200 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:05,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:46:05,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:05,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-05 05:46:05,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:06,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309288463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:06,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:06,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30] total 47 [2021-06-05 05:46:06,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424533672] [2021-06-05 05:46:06,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 05:46:06,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:06,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 05:46:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:46:06,059 INFO L87 Difference]: Start difference. First operand 8338 states and 20083 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:12,835 INFO L93 Difference]: Finished difference Result 11486 states and 26531 transitions. [2021-06-05 05:46:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 05:46:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:46:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:12,844 INFO L225 Difference]: With dead ends: 11486 [2021-06-05 05:46:12,844 INFO L226 Difference]: Without dead ends: 11482 [2021-06-05 05:46:12,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8732 ImplicationChecksByTransitivity, 4009.2ms TimeCoverageRelationStatistics Valid=2129, Invalid=25593, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 05:46:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-06-05 05:46:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 8616. [2021-06-05 05:46:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8615 states have (on average 2.4174114915844456) internal successors, (20826), 8615 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 20826 transitions. [2021-06-05 05:46:12,940 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 20826 transitions. Word has length 63 [2021-06-05 05:46:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:12,940 INFO L482 AbstractCegarLoop]: Abstraction has 8616 states and 20826 transitions. [2021-06-05 05:46:12,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 20826 transitions. [2021-06-05 05:46:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:46:12,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:12,946 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:13,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:13,147 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2113535449, now seen corresponding path program 107 times [2021-06-05 05:46:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:13,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740744358] [2021-06-05 05:46:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:13,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:13,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740744358] [2021-06-05 05:46:13,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740744358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:13,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669549841] [2021-06-05 05:46:13,368 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:13,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 05:46:13,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 05:46:13,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:14,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669549841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:14,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:14,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 50 [2021-06-05 05:46:14,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892481926] [2021-06-05 05:46:14,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:46:14,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:46:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:46:14,152 INFO L87 Difference]: Start difference. First operand 8616 states and 20826 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:23,526 INFO L93 Difference]: Finished difference Result 18453 states and 41420 transitions. [2021-06-05 05:46:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-06-05 05:46:23,527 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:46:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:23,545 INFO L225 Difference]: With dead ends: 18453 [2021-06-05 05:46:23,545 INFO L226 Difference]: Without dead ends: 18405 [2021-06-05 05:46:23,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22263 ImplicationChecksByTransitivity, 5817.1ms TimeCoverageRelationStatistics Valid=5109, Invalid=55161, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 05:46:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-06-05 05:46:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 8296. [2021-06-05 05:46:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8296 states, 8295 states have (on average 2.4176009644364074) internal successors, (20054), 8295 states have internal predecessors, (20054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8296 states to 8296 states and 20054 transitions. [2021-06-05 05:46:23,672 INFO L78 Accepts]: Start accepts. Automaton has 8296 states and 20054 transitions. Word has length 63 [2021-06-05 05:46:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:23,672 INFO L482 AbstractCegarLoop]: Abstraction has 8296 states and 20054 transitions. [2021-06-05 05:46:23,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8296 states and 20054 transitions. [2021-06-05 05:46:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:46:23,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:23,678 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:23,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 05:46:23,879 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:23,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:23,879 INFO L82 PathProgramCache]: Analyzing trace with hash 232798557, now seen corresponding path program 108 times [2021-06-05 05:46:23,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:23,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170201912] [2021-06-05 05:46:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:24,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170201912] [2021-06-05 05:46:24,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170201912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:24,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748406634] [2021-06-05 05:46:24,159 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:24,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 05:46:24,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:24,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:46:24,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:24,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748406634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:24,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:24,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2021-06-05 05:46:24,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322971943] [2021-06-05 05:46:24,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:46:24,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:24,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:46:24,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2297, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:46:24,923 INFO L87 Difference]: Start difference. First operand 8296 states and 20054 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:34,477 INFO L93 Difference]: Finished difference Result 20814 states and 46375 transitions. [2021-06-05 05:46:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 05:46:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:46:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:34,498 INFO L225 Difference]: With dead ends: 20814 [2021-06-05 05:46:34,498 INFO L226 Difference]: Without dead ends: 20736 [2021-06-05 05:46:34,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28610 ImplicationChecksByTransitivity, 6708.0ms TimeCoverageRelationStatistics Valid=6992, Invalid=68358, Unknown=0, NotChecked=0, Total=75350 [2021-06-05 05:46:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20736 states. [2021-06-05 05:46:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20736 to 8280. [2021-06-05 05:46:34,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 2.4179248701534) internal successors, (20018), 8279 states have internal predecessors, (20018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 20018 transitions. [2021-06-05 05:46:34,636 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 20018 transitions. Word has length 63 [2021-06-05 05:46:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:34,636 INFO L482 AbstractCegarLoop]: Abstraction has 8280 states and 20018 transitions. [2021-06-05 05:46:34,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 20018 transitions. [2021-06-05 05:46:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:46:34,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:34,642 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:34,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:34,843 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -742874655, now seen corresponding path program 109 times [2021-06-05 05:46:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:34,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399972542] [2021-06-05 05:46:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:35,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:35,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399972542] [2021-06-05 05:46:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399972542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:35,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015688615] [2021-06-05 05:46:35,099 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:35,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:46:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:35,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015688615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:35,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:35,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-06-05 05:46:35,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951371106] [2021-06-05 05:46:35,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 05:46:35,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 05:46:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:46:35,891 INFO L87 Difference]: Start difference. First operand 8280 states and 20018 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:44,958 INFO L93 Difference]: Finished difference Result 23395 states and 51906 transitions. [2021-06-05 05:46:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-06-05 05:46:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:46:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:44,981 INFO L225 Difference]: With dead ends: 23395 [2021-06-05 05:46:44,981 INFO L226 Difference]: Without dead ends: 23281 [2021-06-05 05:46:44,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31036 ImplicationChecksByTransitivity, 6781.7ms TimeCoverageRelationStatistics Valid=8486, Invalid=71886, Unknown=0, NotChecked=0, Total=80372 [2021-06-05 05:46:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23281 states. [2021-06-05 05:46:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23281 to 8204. [2021-06-05 05:46:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 2.4183835182250397) internal successors, (19838), 8203 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 19838 transitions. [2021-06-05 05:46:45,142 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 19838 transitions. Word has length 63 [2021-06-05 05:46:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:45,142 INFO L482 AbstractCegarLoop]: Abstraction has 8204 states and 19838 transitions. [2021-06-05 05:46:45,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 19838 transitions. [2021-06-05 05:46:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:46:45,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:45,148 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:45,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 05:46:45,349 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2113730405, now seen corresponding path program 110 times [2021-06-05 05:46:45,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:45,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803159814] [2021-06-05 05:46:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:45,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803159814] [2021-06-05 05:46:45,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803159814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115101851] [2021-06-05 05:46:45,577 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:45,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:46:45,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:46:45,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:46,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115101851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:46,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:46,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 52 [2021-06-05 05:46:46,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106645687] [2021-06-05 05:46:46,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:46:46,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:46:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:46:46,280 INFO L87 Difference]: Start difference. First operand 8204 states and 19838 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:46:54,730 INFO L93 Difference]: Finished difference Result 26465 states and 58445 transitions. [2021-06-05 05:46:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-06-05 05:46:54,730 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:46:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:46:54,757 INFO L225 Difference]: With dead ends: 26465 [2021-06-05 05:46:54,757 INFO L226 Difference]: Without dead ends: 26309 [2021-06-05 05:46:54,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26772 ImplicationChecksByTransitivity, 5728.6ms TimeCoverageRelationStatistics Valid=8589, Invalid=60843, Unknown=0, NotChecked=0, Total=69432 [2021-06-05 05:46:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2021-06-05 05:46:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 8152. [2021-06-05 05:46:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.4210526315789473) internal successors, (19734), 8151 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 19734 transitions. [2021-06-05 05:46:54,915 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 19734 transitions. Word has length 63 [2021-06-05 05:46:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:46:54,915 INFO L482 AbstractCegarLoop]: Abstraction has 8152 states and 19734 transitions. [2021-06-05 05:46:54,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:46:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 19734 transitions. [2021-06-05 05:46:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:46:54,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:46:54,921 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:46:55,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:55,129 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:46:55,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:46:55,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1932982761, now seen corresponding path program 111 times [2021-06-05 05:46:55,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:46:55,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853246550] [2021-06-05 05:46:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:46:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:46:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:55,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:46:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853246550] [2021-06-05 05:46:55,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853246550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170689350] [2021-06-05 05:46:55,363 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:46:55,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 05:46:55,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:46:55,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:46:55,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:46:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:46:56,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170689350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:46:56,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:46:56,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 53 [2021-06-05 05:46:56,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398502944] [2021-06-05 05:46:56,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 05:46:56,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:46:56,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 05:46:56,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:46:56,131 INFO L87 Difference]: Start difference. First operand 8152 states and 19734 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:01,595 INFO L93 Difference]: Finished difference Result 29047 states and 63963 transitions. [2021-06-05 05:47:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-05 05:47:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:47:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:01,626 INFO L225 Difference]: With dead ends: 29047 [2021-06-05 05:47:01,626 INFO L226 Difference]: Without dead ends: 28687 [2021-06-05 05:47:01,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16150 ImplicationChecksByTransitivity, 4292.6ms TimeCoverageRelationStatistics Valid=6194, Invalid=36862, Unknown=0, NotChecked=0, Total=43056 [2021-06-05 05:47:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-06-05 05:47:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 8192. [2021-06-05 05:47:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8191 states have (on average 2.418996459528751) internal successors, (19814), 8191 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 19814 transitions. [2021-06-05 05:47:01,804 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 19814 transitions. Word has length 63 [2021-06-05 05:47:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:01,804 INFO L482 AbstractCegarLoop]: Abstraction has 8192 states and 19814 transitions. [2021-06-05 05:47:01,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 19814 transitions. [2021-06-05 05:47:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:47:01,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:01,809 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:02,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-05 05:47:02,010 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1308649837, now seen corresponding path program 112 times [2021-06-05 05:47:02,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:02,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082255563] [2021-06-05 05:47:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:02,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:02,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082255563] [2021-06-05 05:47:02,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082255563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:02,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215432288] [2021-06-05 05:47:02,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:02,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:02,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:02,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:47:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:02,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215432288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:02,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:02,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2021-06-05 05:47:02,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911246799] [2021-06-05 05:47:02,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:47:02,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:47:02,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:47:02,987 INFO L87 Difference]: Start difference. First operand 8192 states and 19814 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:08,619 INFO L93 Difference]: Finished difference Result 29747 states and 65287 transitions. [2021-06-05 05:47:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-05 05:47:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:47:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:08,650 INFO L225 Difference]: With dead ends: 29747 [2021-06-05 05:47:08,651 INFO L226 Difference]: Without dead ends: 29174 [2021-06-05 05:47:08,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19920 ImplicationChecksByTransitivity, 4785.5ms TimeCoverageRelationStatistics Valid=8171, Invalid=43585, Unknown=0, NotChecked=0, Total=51756 [2021-06-05 05:47:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29174 states. [2021-06-05 05:47:08,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29174 to 8224. [2021-06-05 05:47:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8224 states, 8223 states have (on average 2.417365924844947) internal successors, (19878), 8223 states have internal predecessors, (19878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 19878 transitions. [2021-06-05 05:47:08,834 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 19878 transitions. Word has length 63 [2021-06-05 05:47:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:08,834 INFO L482 AbstractCegarLoop]: Abstraction has 8224 states and 19878 transitions. [2021-06-05 05:47:08,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:08,834 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 19878 transitions. [2021-06-05 05:47:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:47:08,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:08,840 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:09,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 05:47:09,041 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1493370353, now seen corresponding path program 113 times [2021-06-05 05:47:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:09,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494454777] [2021-06-05 05:47:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:09,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:09,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494454777] [2021-06-05 05:47:09,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494454777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:09,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488681360] [2021-06-05 05:47:09,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:09,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 05:47:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:47:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:10,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488681360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:10,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:10,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2021-06-05 05:47:10,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689422036] [2021-06-05 05:47:10,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 05:47:10,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 05:47:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:47:10,107 INFO L87 Difference]: Start difference. First operand 8224 states and 19878 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:16,892 INFO L93 Difference]: Finished difference Result 28419 states and 62099 transitions. [2021-06-05 05:47:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-06-05 05:47:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:47:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:16,921 INFO L225 Difference]: With dead ends: 28419 [2021-06-05 05:47:16,921 INFO L226 Difference]: Without dead ends: 27744 [2021-06-05 05:47:16,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26898 ImplicationChecksByTransitivity, 5565.3ms TimeCoverageRelationStatistics Valid=11861, Invalid=54445, Unknown=0, NotChecked=0, Total=66306 [2021-06-05 05:47:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2021-06-05 05:47:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 8248. [2021-06-05 05:47:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8248 states, 8247 states have (on average 2.4161513277555473) internal successors, (19926), 8247 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8248 states to 8248 states and 19926 transitions. [2021-06-05 05:47:17,089 INFO L78 Accepts]: Start accepts. Automaton has 8248 states and 19926 transitions. Word has length 63 [2021-06-05 05:47:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:17,089 INFO L482 AbstractCegarLoop]: Abstraction has 8248 states and 19926 transitions. [2021-06-05 05:47:17,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 8248 states and 19926 transitions. [2021-06-05 05:47:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:47:17,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:17,095 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:17,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:17,295 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 184061813, now seen corresponding path program 114 times [2021-06-05 05:47:17,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:17,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462304989] [2021-06-05 05:47:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:17,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:17,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462304989] [2021-06-05 05:47:17,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462304989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:17,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248853055] [2021-06-05 05:47:17,564 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:17,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 05:47:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:47:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:18,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248853055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:18,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:18,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-06-05 05:47:18,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987976024] [2021-06-05 05:47:18,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 05:47:18,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:18,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 05:47:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:47:18,307 INFO L87 Difference]: Start difference. First operand 8248 states and 19926 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:24,559 INFO L93 Difference]: Finished difference Result 27835 states and 60645 transitions. [2021-06-05 05:47:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 05:47:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:47:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:24,591 INFO L225 Difference]: With dead ends: 27835 [2021-06-05 05:47:24,591 INFO L226 Difference]: Without dead ends: 26926 [2021-06-05 05:47:24,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 5382.1ms TimeCoverageRelationStatistics Valid=12784, Invalid=52496, Unknown=0, NotChecked=0, Total=65280 [2021-06-05 05:47:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-06-05 05:47:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 8264. [2021-06-05 05:47:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8264 states, 8263 states have (on average 2.4153455161563597) internal successors, (19958), 8263 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8264 states to 8264 states and 19958 transitions. [2021-06-05 05:47:24,758 INFO L78 Accepts]: Start accepts. Automaton has 8264 states and 19958 transitions. Word has length 63 [2021-06-05 05:47:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:24,758 INFO L482 AbstractCegarLoop]: Abstraction has 8264 states and 19958 transitions. [2021-06-05 05:47:24,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 8264 states and 19958 transitions. [2021-06-05 05:47:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:47:24,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:24,764 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:24,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:24,969 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2102737415, now seen corresponding path program 115 times [2021-06-05 05:47:24,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:24,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472099848] [2021-06-05 05:47:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:25,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:25,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472099848] [2021-06-05 05:47:25,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472099848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:25,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311453947] [2021-06-05 05:47:25,274 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:47:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:26,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311453947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:26,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:26,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-06-05 05:47:26,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77764204] [2021-06-05 05:47:26,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-06-05 05:47:26,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-06-05 05:47:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:47:26,047 INFO L87 Difference]: Start difference. First operand 8264 states and 19958 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:33,373 INFO L93 Difference]: Finished difference Result 25077 states and 55934 transitions. [2021-06-05 05:47:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-06-05 05:47:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:47:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:33,394 INFO L225 Difference]: With dead ends: 25077 [2021-06-05 05:47:33,394 INFO L226 Difference]: Without dead ends: 24000 [2021-06-05 05:47:33,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29595 ImplicationChecksByTransitivity, 6499.9ms TimeCoverageRelationStatistics Valid=15969, Invalid=59931, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 05:47:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24000 states. [2021-06-05 05:47:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24000 to 8860. [2021-06-05 05:47:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.3754374082853595) internal successors, (21044), 8859 states have internal predecessors, (21044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 21044 transitions. [2021-06-05 05:47:33,541 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 21044 transitions. Word has length 63 [2021-06-05 05:47:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:33,541 INFO L482 AbstractCegarLoop]: Abstraction has 8860 states and 21044 transitions. [2021-06-05 05:47:33,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:33,541 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 21044 transitions. [2021-06-05 05:47:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 05:47:33,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:33,547 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:33,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 05:47:33,748 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash 248636239, now seen corresponding path program 116 times [2021-06-05 05:47:33,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:33,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883371732] [2021-06-05 05:47:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:33,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:33,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883371732] [2021-06-05 05:47:33,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883371732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:33,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916076670] [2021-06-05 05:47:33,906 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:33,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:47:33,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:33,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:47:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:34,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916076670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:34,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:34,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 46 [2021-06-05 05:47:34,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091286354] [2021-06-05 05:47:34,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 05:47:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 05:47:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:47:34,604 INFO L87 Difference]: Start difference. First operand 8860 states and 21044 transitions. Second operand has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:45,399 INFO L93 Difference]: Finished difference Result 18047 states and 40389 transitions. [2021-06-05 05:47:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-06-05 05:47:45,399 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 05:47:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:45,413 INFO L225 Difference]: With dead ends: 18047 [2021-06-05 05:47:45,413 INFO L226 Difference]: Without dead ends: 18043 [2021-06-05 05:47:45,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65131 ImplicationChecksByTransitivity, 9752.9ms TimeCoverageRelationStatistics Valid=28937, Invalid=109075, Unknown=0, NotChecked=0, Total=138012 [2021-06-05 05:47:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18043 states. [2021-06-05 05:47:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18043 to 9034. [2021-06-05 05:47:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9034 states, 9033 states have (on average 2.3871360566810584) internal successors, (21563), 9033 states have internal predecessors, (21563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9034 states to 9034 states and 21563 transitions. [2021-06-05 05:47:45,536 INFO L78 Accepts]: Start accepts. Automaton has 9034 states and 21563 transitions. Word has length 63 [2021-06-05 05:47:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:45,536 INFO L482 AbstractCegarLoop]: Abstraction has 9034 states and 21563 transitions. [2021-06-05 05:47:45,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 9034 states and 21563 transitions. [2021-06-05 05:47:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 05:47:45,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:45,543 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:45,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:45,757 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash -892450307, now seen corresponding path program 117 times [2021-06-05 05:47:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:45,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718817014] [2021-06-05 05:47:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:46,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:46,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718817014] [2021-06-05 05:47:46,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718817014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:46,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874153583] [2021-06-05 05:47:46,053 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:46,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 05:47:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 05:47:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:46,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874153583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:46,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:46,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-06-05 05:47:46,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446312371] [2021-06-05 05:47:46,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 05:47:46,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:46,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 05:47:46,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:47:46,903 INFO L87 Difference]: Start difference. First operand 9034 states and 21563 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:47:54,327 INFO L93 Difference]: Finished difference Result 12913 states and 29503 transitions. [2021-06-05 05:47:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-06-05 05:47:54,327 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 05:47:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:47:54,341 INFO L225 Difference]: With dead ends: 12913 [2021-06-05 05:47:54,341 INFO L226 Difference]: Without dead ends: 12355 [2021-06-05 05:47:54,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32726 ImplicationChecksByTransitivity, 6688.5ms TimeCoverageRelationStatistics Valid=21240, Invalid=58002, Unknown=0, NotChecked=0, Total=79242 [2021-06-05 05:47:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2021-06-05 05:47:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 8889. [2021-06-05 05:47:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8889 states, 8888 states have (on average 2.3834383438343836) internal successors, (21184), 8888 states have internal predecessors, (21184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 21184 transitions. [2021-06-05 05:47:54,443 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 21184 transitions. Word has length 65 [2021-06-05 05:47:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:47:54,443 INFO L482 AbstractCegarLoop]: Abstraction has 8889 states and 21184 transitions. [2021-06-05 05:47:54,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:47:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 21184 transitions. [2021-06-05 05:47:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 05:47:54,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:47:54,449 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:47:54,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:54,650 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:47:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:47:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1356747611, now seen corresponding path program 118 times [2021-06-05 05:47:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:47:54,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759480346] [2021-06-05 05:47:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:47:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:47:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:54,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:47:54,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759480346] [2021-06-05 05:47:54,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759480346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:54,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962635806] [2021-06-05 05:47:54,810 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:47:54,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:47:54,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:47:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 05:47:54,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:47:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:47:55,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962635806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:47:55,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:47:55,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 45 [2021-06-05 05:47:55,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388582063] [2021-06-05 05:47:55,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 05:47:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:47:55,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 05:47:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:47:55,556 INFO L87 Difference]: Start difference. First operand 8889 states and 21184 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:02,235 INFO L93 Difference]: Finished difference Result 10949 states and 25244 transitions. [2021-06-05 05:48:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-06-05 05:48:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 05:48:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:02,243 INFO L225 Difference]: With dead ends: 10949 [2021-06-05 05:48:02,243 INFO L226 Difference]: Without dead ends: 10945 [2021-06-05 05:48:02,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31134 ImplicationChecksByTransitivity, 6279.6ms TimeCoverageRelationStatistics Valid=16708, Invalid=54848, Unknown=0, NotChecked=0, Total=71556 [2021-06-05 05:48:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10945 states. [2021-06-05 05:48:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10945 to 8841. [2021-06-05 05:48:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3854072398190045) internal successors, (21087), 8840 states have internal predecessors, (21087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 21087 transitions. [2021-06-05 05:48:02,328 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 21087 transitions. Word has length 65 [2021-06-05 05:48:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:02,328 INFO L482 AbstractCegarLoop]: Abstraction has 8841 states and 21087 transitions. [2021-06-05 05:48:02,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 21087 transitions. [2021-06-05 05:48:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:48:02,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:02,335 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:02,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-05 05:48:02,535 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:02,536 INFO L82 PathProgramCache]: Analyzing trace with hash 426028347, now seen corresponding path program 119 times [2021-06-05 05:48:02,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:02,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262209513] [2021-06-05 05:48:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:02,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262209513] [2021-06-05 05:48:02,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262209513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454419179] [2021-06-05 05:48:02,691 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:02,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 05:48:02,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:48:02,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:02,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454419179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:02,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:02,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 05:48:02,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882691692] [2021-06-05 05:48:02,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:48:02,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:02,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:48:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:02,858 INFO L87 Difference]: Start difference. First operand 8841 states and 21087 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:03,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:03,092 INFO L93 Difference]: Finished difference Result 10902 states and 25809 transitions. [2021-06-05 05:48:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:48:03,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:48:03,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:03,102 INFO L225 Difference]: With dead ends: 10902 [2021-06-05 05:48:03,102 INFO L226 Difference]: Without dead ends: 10809 [2021-06-05 05:48:03,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2021-06-05 05:48:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10150. [2021-06-05 05:48:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 2.4184648733865406) internal successors, (24545), 10149 states have internal predecessors, (24545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:03,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 24545 transitions. [2021-06-05 05:48:03,206 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 24545 transitions. Word has length 67 [2021-06-05 05:48:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:03,206 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 24545 transitions. [2021-06-05 05:48:03,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 24545 transitions. [2021-06-05 05:48:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:48:03,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:03,213 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:03,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:03,414 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:03,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:03,414 INFO L82 PathProgramCache]: Analyzing trace with hash -815506287, now seen corresponding path program 120 times [2021-06-05 05:48:03,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:03,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357382922] [2021-06-05 05:48:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:03,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357382922] [2021-06-05 05:48:03,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357382922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:03,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775159957] [2021-06-05 05:48:03,720 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:03,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 05:48:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 05:48:03,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:04,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775159957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:04,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:04,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2021-06-05 05:48:04,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872640626] [2021-06-05 05:48:04,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 05:48:04,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:04,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 05:48:04,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:48:04,654 INFO L87 Difference]: Start difference. First operand 10150 states and 24545 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:13,419 INFO L93 Difference]: Finished difference Result 19443 states and 44030 transitions. [2021-06-05 05:48:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-05 05:48:13,419 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:48:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:13,437 INFO L225 Difference]: With dead ends: 19443 [2021-06-05 05:48:13,437 INFO L226 Difference]: Without dead ends: 19410 [2021-06-05 05:48:13,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14672 ImplicationChecksByTransitivity, 5083.0ms TimeCoverageRelationStatistics Valid=2943, Invalid=40113, Unknown=0, NotChecked=0, Total=43056 [2021-06-05 05:48:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19410 states. [2021-06-05 05:48:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19410 to 10699. [2021-06-05 05:48:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 10698 states have (on average 2.419798093101514) internal successors, (25887), 10698 states have internal predecessors, (25887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 25887 transitions. [2021-06-05 05:48:13,593 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 25887 transitions. Word has length 67 [2021-06-05 05:48:13,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:13,594 INFO L482 AbstractCegarLoop]: Abstraction has 10699 states and 25887 transitions. [2021-06-05 05:48:13,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 25887 transitions. [2021-06-05 05:48:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:48:13,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:13,601 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:13,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:13,802 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1545872197, now seen corresponding path program 121 times [2021-06-05 05:48:13,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:13,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757142309] [2021-06-05 05:48:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:14,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:14,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757142309] [2021-06-05 05:48:14,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757142309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:14,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542114738] [2021-06-05 05:48:14,026 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 05:48:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:14,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542114738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:14,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:14,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32] total 50 [2021-06-05 05:48:14,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999021311] [2021-06-05 05:48:14,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:48:14,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:48:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:48:14,973 INFO L87 Difference]: Start difference. First operand 10699 states and 25887 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:21,609 INFO L93 Difference]: Finished difference Result 13973 states and 32494 transitions. [2021-06-05 05:48:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 05:48:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:48:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:21,620 INFO L225 Difference]: With dead ends: 13973 [2021-06-05 05:48:21,620 INFO L226 Difference]: Without dead ends: 13969 [2021-06-05 05:48:21,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8803 ImplicationChecksByTransitivity, 4115.2ms TimeCoverageRelationStatistics Valid=2057, Invalid=26335, Unknown=0, NotChecked=0, Total=28392 [2021-06-05 05:48:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-06-05 05:48:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10321. [2021-06-05 05:48:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 2.4169573643410853) internal successors, (24943), 10320 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 24943 transitions. [2021-06-05 05:48:21,738 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 24943 transitions. Word has length 67 [2021-06-05 05:48:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:21,738 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 24943 transitions. [2021-06-05 05:48:21,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 24943 transitions. [2021-06-05 05:48:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:48:21,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:21,746 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:21,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:21,947 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1944828693, now seen corresponding path program 122 times [2021-06-05 05:48:21,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:21,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640944381] [2021-06-05 05:48:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:22,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:22,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640944381] [2021-06-05 05:48:22,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640944381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:22,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618629964] [2021-06-05 05:48:22,213 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:22,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:22,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:22,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:23,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618629964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:23,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:23,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31] total 52 [2021-06-05 05:48:23,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296030419] [2021-06-05 05:48:23,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 05:48:23,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:23,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 05:48:23,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:48:23,128 INFO L87 Difference]: Start difference. First operand 10321 states and 24943 transitions. Second operand has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:34,368 INFO L93 Difference]: Finished difference Result 22051 states and 49545 transitions. [2021-06-05 05:48:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-06-05 05:48:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:48:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:34,388 INFO L225 Difference]: With dead ends: 22051 [2021-06-05 05:48:34,389 INFO L226 Difference]: Without dead ends: 22003 [2021-06-05 05:48:34,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26033 ImplicationChecksByTransitivity, 6484.7ms TimeCoverageRelationStatistics Valid=5439, Invalid=65051, Unknown=0, NotChecked=0, Total=70490 [2021-06-05 05:48:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22003 states. [2021-06-05 05:48:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22003 to 10745. [2021-06-05 05:48:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.415860014892033) internal successors, (25956), 10744 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:34,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 25956 transitions. [2021-06-05 05:48:34,557 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 25956 transitions. Word has length 67 [2021-06-05 05:48:34,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:34,557 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 25956 transitions. [2021-06-05 05:48:34,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 25956 transitions. [2021-06-05 05:48:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:48:34,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:34,565 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:34,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:34,765 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2010613401, now seen corresponding path program 123 times [2021-06-05 05:48:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:34,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839344416] [2021-06-05 05:48:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:35,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839344416] [2021-06-05 05:48:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839344416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092846732] [2021-06-05 05:48:35,050 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:35,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-05 05:48:35,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:48:35,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:35,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092846732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:35,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:35,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 53 [2021-06-05 05:48:35,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568976160] [2021-06-05 05:48:35,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 05:48:35,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:35,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 05:48:35,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2592, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:48:35,938 INFO L87 Difference]: Start difference. First operand 10745 states and 25956 transitions. Second operand has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:49,145 INFO L93 Difference]: Finished difference Result 25316 states and 56566 transitions. [2021-06-05 05:48:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 05:48:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:48:49,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:49,170 INFO L225 Difference]: With dead ends: 25316 [2021-06-05 05:48:49,170 INFO L226 Difference]: Without dead ends: 25238 [2021-06-05 05:48:49,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35837 ImplicationChecksByTransitivity, 7877.4ms TimeCoverageRelationStatistics Valid=7939, Invalid=85391, Unknown=0, NotChecked=0, Total=93330 [2021-06-05 05:48:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25238 states. [2021-06-05 05:48:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25238 to 10379. [2021-06-05 05:48:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 2.4208903449604935) internal successors, (25124), 10378 states have internal predecessors, (25124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 25124 transitions. [2021-06-05 05:48:49,376 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 25124 transitions. Word has length 67 [2021-06-05 05:48:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:49,376 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 25124 transitions. [2021-06-05 05:48:49,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 25124 transitions. [2021-06-05 05:48:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:48:49,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:49,384 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:49,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 05:48:49,584 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash -963543267, now seen corresponding path program 124 times [2021-06-05 05:48:49,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:49,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983949219] [2021-06-05 05:48:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:49,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:49,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983949219] [2021-06-05 05:48:49,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983949219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:49,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720180713] [2021-06-05 05:48:49,835 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:49,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:49,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-05 05:48:49,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:50,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720180713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:50,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:50,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 54 [2021-06-05 05:48:50,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942896434] [2021-06-05 05:48:50,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:48:50,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:48:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:48:50,667 INFO L87 Difference]: Start difference. First operand 10379 states and 25124 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:03,610 INFO L93 Difference]: Finished difference Result 28045 states and 62416 transitions. [2021-06-05 05:49:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-06-05 05:49:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:49:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:03,638 INFO L225 Difference]: With dead ends: 28045 [2021-06-05 05:49:03,639 INFO L226 Difference]: Without dead ends: 27931 [2021-06-05 05:49:03,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40964 ImplicationChecksByTransitivity, 8042.9ms TimeCoverageRelationStatistics Valid=10037, Invalid=94615, Unknown=0, NotChecked=0, Total=104652 [2021-06-05 05:49:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27931 states. [2021-06-05 05:49:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27931 to 10315. [2021-06-05 05:49:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10315 states, 10314 states have (on average 2.4203994570486715) internal successors, (24964), 10314 states have internal predecessors, (24964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 24964 transitions. [2021-06-05 05:49:03,845 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 24964 transitions. Word has length 67 [2021-06-05 05:49:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:03,845 INFO L482 AbstractCegarLoop]: Abstraction has 10315 states and 24964 transitions. [2021-06-05 05:49:03,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 24964 transitions. [2021-06-05 05:49:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:49:03,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:03,852 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:04,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:04,053 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1200841889, now seen corresponding path program 125 times [2021-06-05 05:49:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:04,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988770570] [2021-06-05 05:49:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:04,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:04,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988770570] [2021-06-05 05:49:04,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988770570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:04,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855340913] [2021-06-05 05:49:04,304 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:04,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-05 05:49:04,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:04,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 05:49:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:05,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855340913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:05,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:05,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 56 [2021-06-05 05:49:05,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596957469] [2021-06-05 05:49:05,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 05:49:05,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 05:49:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:49:05,123 INFO L87 Difference]: Start difference. First operand 10315 states and 24964 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:15,450 INFO L93 Difference]: Finished difference Result 31079 states and 68899 transitions. [2021-06-05 05:49:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-06-05 05:49:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:49:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:15,482 INFO L225 Difference]: With dead ends: 31079 [2021-06-05 05:49:15,483 INFO L226 Difference]: Without dead ends: 30923 [2021-06-05 05:49:15,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39065 ImplicationChecksByTransitivity, 7624.0ms TimeCoverageRelationStatistics Valid=11051, Invalid=87231, Unknown=0, NotChecked=0, Total=98282 [2021-06-05 05:49:15,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30923 states. [2021-06-05 05:49:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30923 to 10231. [2021-06-05 05:49:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10231 states, 10230 states have (on average 2.4218963831867057) internal successors, (24776), 10230 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10231 states to 10231 states and 24776 transitions. [2021-06-05 05:49:15,670 INFO L78 Accepts]: Start accepts. Automaton has 10231 states and 24776 transitions. Word has length 67 [2021-06-05 05:49:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:15,670 INFO L482 AbstractCegarLoop]: Abstraction has 10231 states and 24776 transitions. [2021-06-05 05:49:15,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 10231 states and 24776 transitions. [2021-06-05 05:49:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:49:15,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:15,678 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:15,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-05 05:49:15,881 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1516697381, now seen corresponding path program 126 times [2021-06-05 05:49:15,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:15,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451881160] [2021-06-05 05:49:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:16,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451881160] [2021-06-05 05:49:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451881160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863086712] [2021-06-05 05:49:16,134 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:16,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-05 05:49:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:16,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:49:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:16,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863086712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:16,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:16,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 56 [2021-06-05 05:49:16,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383921253] [2021-06-05 05:49:16,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 05:49:16,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:16,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 05:49:16,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:49:16,931 INFO L87 Difference]: Start difference. First operand 10231 states and 24776 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:25,933 INFO L93 Difference]: Finished difference Result 35057 states and 77375 transitions. [2021-06-05 05:49:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-06-05 05:49:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:49:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:25,971 INFO L225 Difference]: With dead ends: 35057 [2021-06-05 05:49:25,971 INFO L226 Difference]: Without dead ends: 34541 [2021-06-05 05:49:25,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29483 ImplicationChecksByTransitivity, 6321.6ms TimeCoverageRelationStatistics Valid=9853, Invalid=66047, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 05:49:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34541 states. [2021-06-05 05:49:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34541 to 10223. [2021-06-05 05:49:26,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10223 states, 10222 states have (on average 2.422226570142829) internal successors, (24760), 10222 states have internal predecessors, (24760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10223 states to 10223 states and 24760 transitions. [2021-06-05 05:49:26,228 INFO L78 Accepts]: Start accepts. Automaton has 10223 states and 24760 transitions. Word has length 67 [2021-06-05 05:49:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:26,228 INFO L482 AbstractCegarLoop]: Abstraction has 10223 states and 24760 transitions. [2021-06-05 05:49:26,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 10223 states and 24760 transitions. [2021-06-05 05:49:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:49:26,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:26,236 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:26,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 05:49:26,439 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1386608297, now seen corresponding path program 127 times [2021-06-05 05:49:26,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:26,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566462178] [2021-06-05 05:49:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:26,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566462178] [2021-06-05 05:49:26,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566462178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:26,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416791674] [2021-06-05 05:49:26,708 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:26,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 05:49:26,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:27,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416791674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:27,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:27,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 57 [2021-06-05 05:49:27,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071719562] [2021-06-05 05:49:27,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-05 05:49:27,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-05 05:49:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:49:27,522 INFO L87 Difference]: Start difference. First operand 10223 states and 24760 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:34,465 INFO L93 Difference]: Finished difference Result 37059 states and 81726 transitions. [2021-06-05 05:49:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-05 05:49:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:49:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:34,504 INFO L225 Difference]: With dead ends: 37059 [2021-06-05 05:49:34,504 INFO L226 Difference]: Without dead ends: 36519 [2021-06-05 05:49:34,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22513 ImplicationChecksByTransitivity, 5215.6ms TimeCoverageRelationStatistics Valid=8563, Invalid=49759, Unknown=0, NotChecked=0, Total=58322 [2021-06-05 05:49:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36519 states. [2021-06-05 05:49:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36519 to 10263. [2021-06-05 05:49:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.420580783473007) internal successors, (24840), 10262 states have internal predecessors, (24840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 24840 transitions. [2021-06-05 05:49:34,753 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 24840 transitions. Word has length 67 [2021-06-05 05:49:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:34,753 INFO L482 AbstractCegarLoop]: Abstraction has 10263 states and 24840 transitions. [2021-06-05 05:49:34,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 24840 transitions. [2021-06-05 05:49:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:49:34,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:34,760 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:34,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 05:49:34,969 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash -201710803, now seen corresponding path program 128 times [2021-06-05 05:49:34,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:34,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513366118] [2021-06-05 05:49:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:35,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513366118] [2021-06-05 05:49:35,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513366118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701120551] [2021-06-05 05:49:35,241 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:35,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:35,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:49:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:36,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701120551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:36,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:36,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 59 [2021-06-05 05:49:36,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464649300] [2021-06-05 05:49:36,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 05:49:36,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:36,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 05:49:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3118, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:49:36,073 INFO L87 Difference]: Start difference. First operand 10263 states and 24840 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:43,492 INFO L93 Difference]: Finished difference Result 36366 states and 79874 transitions. [2021-06-05 05:49:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-06-05 05:49:43,493 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:49:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:43,528 INFO L225 Difference]: With dead ends: 36366 [2021-06-05 05:49:43,528 INFO L226 Difference]: Without dead ends: 35634 [2021-06-05 05:49:43,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30002 ImplicationChecksByTransitivity, 6020.9ms TimeCoverageRelationStatistics Valid=12366, Invalid=62436, Unknown=0, NotChecked=0, Total=74802 [2021-06-05 05:49:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35634 states. [2021-06-05 05:49:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35634 to 10295. [2021-06-05 05:49:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10295 states, 10294 states have (on average 2.41927336312415) internal successors, (24904), 10294 states have internal predecessors, (24904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10295 states to 10295 states and 24904 transitions. [2021-06-05 05:49:43,751 INFO L78 Accepts]: Start accepts. Automaton has 10295 states and 24904 transitions. Word has length 67 [2021-06-05 05:49:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:43,751 INFO L482 AbstractCegarLoop]: Abstraction has 10295 states and 24904 transitions. [2021-06-05 05:49:43,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 10295 states and 24904 transitions. [2021-06-05 05:49:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:49:43,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:43,758 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:43,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:43,959 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:43,959 INFO L82 PathProgramCache]: Analyzing trace with hash -300073807, now seen corresponding path program 129 times [2021-06-05 05:49:43,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:43,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241059678] [2021-06-05 05:49:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:44,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241059678] [2021-06-05 05:49:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241059678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978742931] [2021-06-05 05:49:44,244 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:44,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 05:49:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 05:49:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:45,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978742931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:45,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:45,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-06-05 05:49:45,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016425434] [2021-06-05 05:49:45,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 05:49:45,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 05:49:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:49:45,065 INFO L87 Difference]: Start difference. First operand 10295 states and 24904 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:52,477 INFO L93 Difference]: Finished difference Result 35312 states and 77377 transitions. [2021-06-05 05:49:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-06-05 05:49:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:49:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:52,511 INFO L225 Difference]: With dead ends: 35312 [2021-06-05 05:49:52,511 INFO L226 Difference]: Without dead ends: 34400 [2021-06-05 05:49:52,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30734 ImplicationChecksByTransitivity, 6114.8ms TimeCoverageRelationStatistics Valid=13856, Invalid=63150, Unknown=0, NotChecked=0, Total=77006 [2021-06-05 05:49:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34400 states. [2021-06-05 05:49:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34400 to 10319. [2021-06-05 05:49:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 2.418298119790657) internal successors, (24952), 10318 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 24952 transitions. [2021-06-05 05:49:52,718 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 24952 transitions. Word has length 67 [2021-06-05 05:49:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:52,718 INFO L482 AbstractCegarLoop]: Abstraction has 10319 states and 24952 transitions. [2021-06-05 05:49:52,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 24952 transitions. [2021-06-05 05:49:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:49:52,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:52,725 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:52,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-05 05:49:52,925 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1490617141, now seen corresponding path program 130 times [2021-06-05 05:49:52,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:52,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473019965] [2021-06-05 05:49:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:53,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:53,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473019965] [2021-06-05 05:49:53,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473019965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:53,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357888078] [2021-06-05 05:49:53,228 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:53,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:49:53,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:54,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357888078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:54,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:54,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-06-05 05:49:54,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89671216] [2021-06-05 05:49:54,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-06-05 05:49:54,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:54,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-06-05 05:49:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:49:54,057 INFO L87 Difference]: Start difference. First operand 10319 states and 24952 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:01,441 INFO L93 Difference]: Finished difference Result 33658 states and 73530 transitions. [2021-06-05 05:50:01,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-06-05 05:50:01,441 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:50:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:01,472 INFO L225 Difference]: With dead ends: 33658 [2021-06-05 05:50:01,472 INFO L226 Difference]: Without dead ends: 32578 [2021-06-05 05:50:01,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33793 ImplicationChecksByTransitivity, 6478.6ms TimeCoverageRelationStatistics Valid=16733, Invalid=67077, Unknown=0, NotChecked=0, Total=83810 [2021-06-05 05:50:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32578 states. [2021-06-05 05:50:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32578 to 10335. [2021-06-05 05:50:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.4176504741629574) internal successors, (24984), 10334 states have internal predecessors, (24984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 24984 transitions. [2021-06-05 05:50:01,684 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 24984 transitions. Word has length 67 [2021-06-05 05:50:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:01,684 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 24984 transitions. [2021-06-05 05:50:01,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 24984 transitions. [2021-06-05 05:50:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:50:01,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:01,691 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:01,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:01,892 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash 805779129, now seen corresponding path program 131 times [2021-06-05 05:50:01,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:01,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14224042] [2021-06-05 05:50:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:02,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:02,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14224042] [2021-06-05 05:50:02,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14224042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:02,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539337676] [2021-06-05 05:50:02,311 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:02,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 05:50:02,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:50:02,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:03,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539337676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:03,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:03,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-06-05 05:50:03,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216922038] [2021-06-05 05:50:03,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-05 05:50:03,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:03,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-05 05:50:03,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3340, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:50:03,294 INFO L87 Difference]: Start difference. First operand 10335 states and 24984 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:12,477 INFO L93 Difference]: Finished difference Result 29282 states and 65375 transitions. [2021-06-05 05:50:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-06-05 05:50:12,477 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:50:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:12,505 INFO L225 Difference]: With dead ends: 29282 [2021-06-05 05:50:12,506 INFO L226 Difference]: Without dead ends: 28076 [2021-06-05 05:50:12,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39537 ImplicationChecksByTransitivity, 8231.5ms TimeCoverageRelationStatistics Valid=20497, Invalid=75913, Unknown=0, NotChecked=0, Total=96410 [2021-06-05 05:50:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28076 states. [2021-06-05 05:50:12,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28076 to 10468. [2021-06-05 05:50:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3830132798318524) internal successors, (24943), 10467 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 24943 transitions. [2021-06-05 05:50:12,688 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 24943 transitions. Word has length 67 [2021-06-05 05:50:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:12,688 INFO L482 AbstractCegarLoop]: Abstraction has 10468 states and 24943 transitions. [2021-06-05 05:50:12,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 24943 transitions. [2021-06-05 05:50:12,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 05:50:12,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:12,696 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:12,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:12,897 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1637879469, now seen corresponding path program 132 times [2021-06-05 05:50:12,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:12,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347971921] [2021-06-05 05:50:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:13,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347971921] [2021-06-05 05:50:13,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347971921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:13,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165047954] [2021-06-05 05:50:13,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:13,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 05:50:13,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:13,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:50:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:13,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165047954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:13,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:13,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 49 [2021-06-05 05:50:13,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528207110] [2021-06-05 05:50:13,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 05:50:13,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 05:50:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:50:13,930 INFO L87 Difference]: Start difference. First operand 10468 states and 24943 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:27,291 INFO L93 Difference]: Finished difference Result 20078 states and 44963 transitions. [2021-06-05 05:50:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-06-05 05:50:27,291 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 05:50:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:27,308 INFO L225 Difference]: With dead ends: 20078 [2021-06-05 05:50:27,308 INFO L226 Difference]: Without dead ends: 20074 [2021-06-05 05:50:27,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88148 ImplicationChecksByTransitivity, 12417.2ms TimeCoverageRelationStatistics Valid=38110, Invalid=144646, Unknown=0, NotChecked=0, Total=182756 [2021-06-05 05:50:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20074 states. [2021-06-05 05:50:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20074 to 10541. [2021-06-05 05:50:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10541 states, 10540 states have (on average 2.3928842504743835) internal successors, (25221), 10540 states have internal predecessors, (25221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 25221 transitions. [2021-06-05 05:50:27,471 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 25221 transitions. Word has length 67 [2021-06-05 05:50:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:27,471 INFO L482 AbstractCegarLoop]: Abstraction has 10541 states and 25221 transitions. [2021-06-05 05:50:27,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 25221 transitions. [2021-06-05 05:50:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 05:50:27,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:27,479 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:27,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-06-05 05:50:27,694 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 192572857, now seen corresponding path program 133 times [2021-06-05 05:50:27,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:27,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251260803] [2021-06-05 05:50:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:28,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:28,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251260803] [2021-06-05 05:50:28,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251260803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:28,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675175031] [2021-06-05 05:50:28,191 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:50:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:29,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675175031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:29,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:29,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2021-06-05 05:50:29,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81669749] [2021-06-05 05:50:29,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-06-05 05:50:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-06-05 05:50:29,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:50:29,281 INFO L87 Difference]: Start difference. First operand 10541 states and 25221 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:38,496 INFO L93 Difference]: Finished difference Result 14048 states and 32048 transitions. [2021-06-05 05:50:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-06-05 05:50:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 05:50:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:38,507 INFO L225 Difference]: With dead ends: 14048 [2021-06-05 05:50:38,508 INFO L226 Difference]: Without dead ends: 13436 [2021-06-05 05:50:38,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42486 ImplicationChecksByTransitivity, 8538.5ms TimeCoverageRelationStatistics Valid=27030, Invalid=73142, Unknown=0, NotChecked=0, Total=100172 [2021-06-05 05:50:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2021-06-05 05:50:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 10532. [2021-06-05 05:50:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.3910359889849016) internal successors, (25180), 10531 states have internal predecessors, (25180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25180 transitions. [2021-06-05 05:50:38,627 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25180 transitions. Word has length 69 [2021-06-05 05:50:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:38,628 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25180 transitions. [2021-06-05 05:50:38,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25180 transitions. [2021-06-05 05:50:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 05:50:38,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:38,635 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:38,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:38,836 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:38,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:38,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1907055525, now seen corresponding path program 134 times [2021-06-05 05:50:38,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:38,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81316862] [2021-06-05 05:50:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:38,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:38,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81316862] [2021-06-05 05:50:38,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81316862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:38,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909773625] [2021-06-05 05:50:38,992 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:39,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:39,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:50:39,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:39,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909773625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:39,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:39,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32] total 48 [2021-06-05 05:50:39,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811371113] [2021-06-05 05:50:39,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 05:50:39,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:39,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 05:50:39,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1881, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:50:39,802 INFO L87 Difference]: Start difference. First operand 10532 states and 25180 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:47,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:47,772 INFO L93 Difference]: Finished difference Result 12908 states and 29868 transitions. [2021-06-05 05:50:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-06-05 05:50:47,772 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 05:50:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:47,782 INFO L225 Difference]: With dead ends: 12908 [2021-06-05 05:50:47,782 INFO L226 Difference]: Without dead ends: 12904 [2021-06-05 05:50:47,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40550 ImplicationChecksByTransitivity, 7550.7ms TimeCoverageRelationStatistics Valid=21246, Invalid=69656, Unknown=0, NotChecked=0, Total=90902 [2021-06-05 05:50:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2021-06-05 05:50:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 10532. [2021-06-05 05:50:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.390941031241098) internal successors, (25179), 10531 states have internal predecessors, (25179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25179 transitions. [2021-06-05 05:50:47,895 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25179 transitions. Word has length 69 [2021-06-05 05:50:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:47,895 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25179 transitions. [2021-06-05 05:50:47,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25179 transitions. [2021-06-05 05:50:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 05:50:47,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:47,903 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:48,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:48,103 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1564076785, now seen corresponding path program 135 times [2021-06-05 05:50:48,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:48,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660072491] [2021-06-05 05:50:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:48,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:48,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660072491] [2021-06-05 05:50:48,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660072491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:48,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624463896] [2021-06-05 05:50:48,272 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:48,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 05:50:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:50:48,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624463896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:49,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:49,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-06-05 05:50:49,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714517882] [2021-06-05 05:50:49,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 05:50:49,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 05:50:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:50:49,108 INFO L87 Difference]: Start difference. First operand 10532 states and 25179 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:56,368 INFO L93 Difference]: Finished difference Result 24107 states and 54772 transitions. [2021-06-05 05:50:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-05 05:50:56,369 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 05:50:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:56,391 INFO L225 Difference]: With dead ends: 24107 [2021-06-05 05:50:56,391 INFO L226 Difference]: Without dead ends: 24107 [2021-06-05 05:50:56,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21229 ImplicationChecksByTransitivity, 6581.8ms TimeCoverageRelationStatistics Valid=13586, Invalid=43296, Unknown=0, NotChecked=0, Total=56882 [2021-06-05 05:50:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24107 states. [2021-06-05 05:50:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24107 to 16231. [2021-06-05 05:50:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16231 states, 16230 states have (on average 2.4091189155884165) internal successors, (39100), 16230 states have internal predecessors, (39100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16231 states to 16231 states and 39100 transitions. [2021-06-05 05:50:56,596 INFO L78 Accepts]: Start accepts. Automaton has 16231 states and 39100 transitions. Word has length 69 [2021-06-05 05:50:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:56,596 INFO L482 AbstractCegarLoop]: Abstraction has 16231 states and 39100 transitions. [2021-06-05 05:50:56,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 16231 states and 39100 transitions. [2021-06-05 05:50:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:50:56,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:56,609 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:56,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-05 05:50:56,810 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:56,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:56,810 INFO L82 PathProgramCache]: Analyzing trace with hash -543763977, now seen corresponding path program 136 times [2021-06-05 05:50:56,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:56,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44466210] [2021-06-05 05:50:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 1 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:56,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44466210] [2021-06-05 05:50:56,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44466210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661220756] [2021-06-05 05:50:56,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:56,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:56,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:50:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:57,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661220756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:57,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:57,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 05:50:57,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003249809] [2021-06-05 05:50:57,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:50:57,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:57,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:50:57,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:50:57,089 INFO L87 Difference]: Start difference. First operand 16231 states and 39100 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:57,340 INFO L93 Difference]: Finished difference Result 19318 states and 46494 transitions. [2021-06-05 05:50:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:50:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:50:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:57,362 INFO L225 Difference]: With dead ends: 19318 [2021-06-05 05:50:57,362 INFO L226 Difference]: Without dead ends: 19219 [2021-06-05 05:50:57,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:50:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19219 states. [2021-06-05 05:50:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19219 to 18332. [2021-06-05 05:50:57,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18332 states, 18331 states have (on average 2.4355463422617425) internal successors, (44646), 18331 states have internal predecessors, (44646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18332 states to 18332 states and 44646 transitions. [2021-06-05 05:50:57,621 INFO L78 Accepts]: Start accepts. Automaton has 18332 states and 44646 transitions. Word has length 71 [2021-06-05 05:50:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:57,621 INFO L482 AbstractCegarLoop]: Abstraction has 18332 states and 44646 transitions. [2021-06-05 05:50:57,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 18332 states and 44646 transitions. [2021-06-05 05:50:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:50:57,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:57,635 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:50:57,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-05 05:50:57,835 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:57,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:57,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1240447561, now seen corresponding path program 137 times [2021-06-05 05:50:57,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:57,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46661104] [2021-06-05 05:50:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:58,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:58,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46661104] [2021-06-05 05:50:58,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46661104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:58,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042447986] [2021-06-05 05:50:58,332 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:58,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 05:50:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:58,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 85 conjunts are in the unsatisfiable core [2021-06-05 05:50:58,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:59,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042447986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:59,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:59,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-06-05 05:50:59,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248220483] [2021-06-05 05:50:59,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-05 05:50:59,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-05 05:50:59,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4037, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:50:59,558 INFO L87 Difference]: Start difference. First operand 18332 states and 44646 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:06,655 INFO L93 Difference]: Finished difference Result 22788 states and 54409 transitions. [2021-06-05 05:51:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 05:51:06,655 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:51:06,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:06,677 INFO L225 Difference]: With dead ends: 22788 [2021-06-05 05:51:06,677 INFO L226 Difference]: Without dead ends: 22782 [2021-06-05 05:51:06,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8535 ImplicationChecksByTransitivity, 5106.5ms TimeCoverageRelationStatistics Valid=1710, Invalid=29796, Unknown=0, NotChecked=0, Total=31506 [2021-06-05 05:51:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2021-06-05 05:51:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 18201. [2021-06-05 05:51:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18201 states, 18200 states have (on average 2.431263736263736) internal successors, (44249), 18200 states have internal predecessors, (44249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:06,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18201 states to 18201 states and 44249 transitions. [2021-06-05 05:51:06,899 INFO L78 Accepts]: Start accepts. Automaton has 18201 states and 44249 transitions. Word has length 71 [2021-06-05 05:51:06,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:06,899 INFO L482 AbstractCegarLoop]: Abstraction has 18201 states and 44249 transitions. [2021-06-05 05:51:06,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 18201 states and 44249 transitions. [2021-06-05 05:51:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:51:06,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:06,913 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:07,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 05:51:07,114 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash -761922611, now seen corresponding path program 138 times [2021-06-05 05:51:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:07,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864869278] [2021-06-05 05:51:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:07,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:07,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864869278] [2021-06-05 05:51:07,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864869278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:07,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805565849] [2021-06-05 05:51:07,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:07,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 05:51:07,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-05 05:51:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:08,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805565849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:08,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:08,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 54 [2021-06-05 05:51:08,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965580051] [2021-06-05 05:51:08,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 05:51:08,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 05:51:08,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:51:08,437 INFO L87 Difference]: Start difference. First operand 18201 states and 44249 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:17,574 INFO L93 Difference]: Finished difference Result 32295 states and 74537 transitions. [2021-06-05 05:51:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-06-05 05:51:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:51:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:17,605 INFO L225 Difference]: With dead ends: 32295 [2021-06-05 05:51:17,605 INFO L226 Difference]: Without dead ends: 32271 [2021-06-05 05:51:17,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17146 ImplicationChecksByTransitivity, 5678.7ms TimeCoverageRelationStatistics Valid=3190, Invalid=46762, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 05:51:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2021-06-05 05:51:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 18835. [2021-06-05 05:51:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18835 states, 18834 states have (on average 2.43320590421578) internal successors, (45827), 18834 states have internal predecessors, (45827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:17,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18835 states to 18835 states and 45827 transitions. [2021-06-05 05:51:17,875 INFO L78 Accepts]: Start accepts. Automaton has 18835 states and 45827 transitions. Word has length 71 [2021-06-05 05:51:17,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:17,875 INFO L482 AbstractCegarLoop]: Abstraction has 18835 states and 45827 transitions. [2021-06-05 05:51:17,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 18835 states and 45827 transitions. [2021-06-05 05:51:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:51:17,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:17,891 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:18,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:18,105 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:18,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1492288521, now seen corresponding path program 139 times [2021-06-05 05:51:18,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:18,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144023973] [2021-06-05 05:51:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:18,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:18,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144023973] [2021-06-05 05:51:18,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144023973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:18,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928355961] [2021-06-05 05:51:18,347 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-05 05:51:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:19,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928355961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:19,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:19,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34] total 53 [2021-06-05 05:51:19,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035136066] [2021-06-05 05:51:19,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 05:51:19,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 05:51:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2613, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:51:19,430 INFO L87 Difference]: Start difference. First operand 18835 states and 45827 transitions. Second operand has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:27,725 INFO L93 Difference]: Finished difference Result 22962 states and 54390 transitions. [2021-06-05 05:51:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 05:51:27,725 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:51:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:27,744 INFO L225 Difference]: With dead ends: 22962 [2021-06-05 05:51:27,744 INFO L226 Difference]: Without dead ends: 22958 [2021-06-05 05:51:27,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10162 ImplicationChecksByTransitivity, 4701.4ms TimeCoverageRelationStatistics Valid=2219, Invalid=30361, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 05:51:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22958 states. [2021-06-05 05:51:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22958 to 18355. [2021-06-05 05:51:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18355 states, 18354 states have (on average 2.4328756674294434) internal successors, (44653), 18354 states have internal predecessors, (44653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18355 states to 18355 states and 44653 transitions. [2021-06-05 05:51:27,968 INFO L78 Accepts]: Start accepts. Automaton has 18355 states and 44653 transitions. Word has length 71 [2021-06-05 05:51:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:27,968 INFO L482 AbstractCegarLoop]: Abstraction has 18355 states and 44653 transitions. [2021-06-05 05:51:27,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 18355 states and 44653 transitions. [2021-06-05 05:51:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:51:27,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:27,982 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:28,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-06-05 05:51:28,197 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:28,197 INFO L82 PathProgramCache]: Analyzing trace with hash -350033327, now seen corresponding path program 140 times [2021-06-05 05:51:28,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:28,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029529521] [2021-06-05 05:51:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:28,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:28,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029529521] [2021-06-05 05:51:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029529521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:28,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055173294] [2021-06-05 05:51:28,518 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:28,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:28,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:28,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-05 05:51:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:29,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055173294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:29,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:29,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33] total 55 [2021-06-05 05:51:29,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757571466] [2021-06-05 05:51:29,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-06-05 05:51:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-06-05 05:51:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2813, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:51:29,535 INFO L87 Difference]: Start difference. First operand 18355 states and 44653 transitions. Second operand has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:42,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:42,921 INFO L93 Difference]: Finished difference Result 37702 states and 86336 transitions. [2021-06-05 05:51:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-06-05 05:51:42,922 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:51:42,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:42,952 INFO L225 Difference]: With dead ends: 37702 [2021-06-05 05:51:42,952 INFO L226 Difference]: Without dead ends: 37654 [2021-06-05 05:51:42,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30992 ImplicationChecksByTransitivity, 7671.1ms TimeCoverageRelationStatistics Valid=5971, Invalid=77261, Unknown=0, NotChecked=0, Total=83232 [2021-06-05 05:51:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37654 states. [2021-06-05 05:51:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37654 to 18337. [2021-06-05 05:51:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 18336 states have (on average 2.4334096858638743) internal successors, (44619), 18336 states have internal predecessors, (44619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 44619 transitions. [2021-06-05 05:51:43,234 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 44619 transitions. Word has length 71 [2021-06-05 05:51:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:43,234 INFO L482 AbstractCegarLoop]: Abstraction has 18337 states and 44619 transitions. [2021-06-05 05:51:43,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 44619 transitions. [2021-06-05 05:51:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:51:43,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:43,250 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:43,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:43,450 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2012235221, now seen corresponding path program 141 times [2021-06-05 05:51:43,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:43,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985588720] [2021-06-05 05:51:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:43,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:43,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985588720] [2021-06-05 05:51:43,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985588720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:43,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770983079] [2021-06-05 05:51:43,723 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:43,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-05 05:51:43,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-06-05 05:51:43,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:44,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770983079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:44,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:44,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-06-05 05:51:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198838800] [2021-06-05 05:51:44,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 05:51:44,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:44,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 05:51:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2905, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:51:44,714 INFO L87 Difference]: Start difference. First operand 18337 states and 44619 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:00,233 INFO L93 Difference]: Finished difference Result 40824 states and 93013 transitions. [2021-06-05 05:52:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2021-06-05 05:52:00,234 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:52:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:00,271 INFO L225 Difference]: With dead ends: 40824 [2021-06-05 05:52:00,271 INFO L226 Difference]: Without dead ends: 40746 [2021-06-05 05:52:00,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43904 ImplicationChecksByTransitivity, 8951.8ms TimeCoverageRelationStatistics Valid=8886, Invalid=104346, Unknown=0, NotChecked=0, Total=113232 [2021-06-05 05:52:00,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40746 states. [2021-06-05 05:52:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40746 to 18395. [2021-06-05 05:52:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18395 states, 18394 states have (on average 2.434326410786126) internal successors, (44777), 18394 states have internal predecessors, (44777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18395 states to 18395 states and 44777 transitions. [2021-06-05 05:52:00,571 INFO L78 Accepts]: Start accepts. Automaton has 18395 states and 44777 transitions. Word has length 71 [2021-06-05 05:52:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:00,572 INFO L482 AbstractCegarLoop]: Abstraction has 18395 states and 44777 transitions. [2021-06-05 05:52:00,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 18395 states and 44777 transitions. [2021-06-05 05:52:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:52:00,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:00,585 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:00,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 05:52:00,786 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1654141351, now seen corresponding path program 142 times [2021-06-05 05:52:00,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:00,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101343439] [2021-06-05 05:52:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:00,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 12 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:01,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:01,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101343439] [2021-06-05 05:52:01,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101343439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:01,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839025596] [2021-06-05 05:52:01,078 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:01,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:01,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 05:52:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 12 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:02,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839025596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:02,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:02,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 33] total 57 [2021-06-05 05:52:02,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659041385] [2021-06-05 05:52:02,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-05 05:52:02,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:02,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-05 05:52:02,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2997, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:52:02,028 INFO L87 Difference]: Start difference. First operand 18395 states and 44777 transitions. Second operand has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:16,252 INFO L93 Difference]: Finished difference Result 45054 states and 102607 transitions. [2021-06-05 05:52:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 311 states. [2021-06-05 05:52:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 05:52:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:16,297 INFO L225 Difference]: With dead ends: 45054 [2021-06-05 05:52:16,297 INFO L226 Difference]: Without dead ends: 44940 [2021-06-05 05:52:16,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52320 ImplicationChecksByTransitivity, 9610.7ms TimeCoverageRelationStatistics Valid=11585, Invalid=120547, Unknown=0, NotChecked=0, Total=132132 [2021-06-05 05:52:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44940 states. [2021-06-05 05:52:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44940 to 18331. [2021-06-05 05:52:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18331 states, 18330 states have (on average 2.4338788870703763) internal successors, (44613), 18330 states have internal predecessors, (44613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18331 states to 18331 states and 44613 transitions. [2021-06-05 05:52:16,667 INFO L78 Accepts]: Start accepts. Automaton has 18331 states and 44613 transitions. Word has length 71 [2021-06-05 05:52:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:16,667 INFO L482 AbstractCegarLoop]: Abstraction has 18331 states and 44613 transitions. [2021-06-05 05:52:16,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.3620689655172415) internal successors, (137), 57 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 18331 states and 44613 transitions. [2021-06-05 05:52:16,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 05:52:16,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:16,681 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:16,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-05 05:52:16,881 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1006846941, now seen corresponding path program 143 times [2021-06-05 05:52:16,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:16,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274758341] [2021-06-05 05:52:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 20 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:17,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:17,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274758341] [2021-06-05 05:52:17,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274758341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:17,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067438162] [2021-06-05 05:52:17,165 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:17,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-05 05:52:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-06-05 05:52:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 20 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:18,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067438162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:18,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:18,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 34] total 59 [2021-06-05 05:52:18,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841094456] [2021-06-05 05:52:18,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 05:52:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:18,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 05:52:18,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=3192, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:52:18,072 INFO L87 Difference]: Start difference. First operand 18331 states and 44613 transitions. Second operand has 60 states, 60 states have (on average 2.283333333333333) internal successors, (137), 59 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:52:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:52:19,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:19,225 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:52:19,226 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:52:19,228 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:52:19,228 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:52:19 BasicIcfg [2021-06-05 05:52:19,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:52:19,229 INFO L168 Benchmark]: Toolchain (without parser) took 770528.42 ms. Allocated memory was 400.6 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 379.7 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-05 05:52:19,229 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 400.6 MB. Free memory is still 380.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:52:19,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.50 ms. Allocated memory is still 400.6 MB. Free memory was 379.7 MB in the beginning and 378.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:52:19,229 INFO L168 Benchmark]: Boogie Preprocessor took 11.72 ms. Allocated memory is still 400.6 MB. Free memory was 378.3 MB in the beginning and 377.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:52:19,229 INFO L168 Benchmark]: RCFGBuilder took 192.91 ms. Allocated memory is still 400.6 MB. Free memory was 377.3 MB in the beginning and 366.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 05:52:19,229 INFO L168 Benchmark]: TraceAbstraction took 770299.40 ms. Allocated memory was 400.6 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 365.9 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. [2021-06-05 05:52:19,229 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 0.14 ms. Allocated memory is still 400.6 MB. Free memory is still 380.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.50 ms. Allocated memory is still 400.6 MB. Free memory was 379.7 MB in the beginning and 378.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.72 ms. Allocated memory is still 400.6 MB. Free memory was 378.3 MB in the beginning and 377.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 192.91 ms. Allocated memory is still 400.6 MB. Free memory was 377.3 MB in the beginning and 366.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 770299.40 ms. Allocated memory was 400.6 MB in the beginning and 1.6 GB in the end (delta: 1.2 GB). Free memory was 365.9 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (18331states) and FLOYD_HOARE automaton (currently 26 states, 60 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 81 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (18331states) and FLOYD_HOARE automaton (currently 26 states, 60 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 81 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (18331states) and FLOYD_HOARE automaton (currently 26 states, 60 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 81 known predicates. - 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: 770244.2ms, OverallIterations: 145, TraceHistogramMax: 14, EmptinessCheckTime: 586.3ms, AutomataDifference: 625618.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9350 SDtfs, 77472 SDslu, 169565 SDs, 0 SdLazy, 504647 SolverSat, 24017 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 156508.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27194 GetRequests, 4950 SyntacticMatches, 94 SemanticMatches, 22149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877731 ImplicationChecksByTransitivity, 481490.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18835occurred in iteration=140, InterpolantAutomatonStates: 17654, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 12154.5ms AutomataMinimizationTime, 144 MinimizatonAttempts, 930644 StatesRemovedByMinimization, 144 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 549.9ms SsaConstructionTime, 2840.3ms SatisfiabilityAnalysisTime, 95910.3ms InterpolantComputationTime, 14394 NumberOfCodeBlocks, 14394 NumberOfCodeBlocksAsserted, 1068 NumberOfCheckSat, 14106 ConstructedInterpolants, 0 QuantifiedInterpolants, 131283 SizeOfPredicates, 536 NumberOfNonLiveVariables, 16737 ConjunctsInSsa, 6319 ConjunctsInUnsatCore, 288 InterpolantComputations, 2 PerfectInterpolantSequences, 8550/51613 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